ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY
www.icc-es.org (800) 423-6587 (562) 699-0543A Subsidiary of the International Code Council ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BYSHAKE-TABLE TESTING OF NONSTRUCTURAL COMPONENTSAC156Approved October 2010Effective November 1, 2010Previously approved December 2006, June 2004, and January 2000PREFACEEvaluation reports issued by ICC Evaluation Service, LLC (ICC-ES), are based upon performance features of theInternational family of codes and other widely adopted code families, including the Uniform Codes, the BOCA NationalCodes, and the SBCCI Standard Codes. Section 104.11 of the International Building Code reads as follows:The provisions of this code are not intended to prevent the installation of any materials or to prohibitany design or method of construction not specifically prescribed by this code, provided that any suchalternative has been approved. An alternative material, design or method of construction shall beapproved where the building official finds that the proposed design is satisfactory and complies withthe intent of the provisions of this code, and that the material, method or work offered is, for thepurpose intended, at least the equivalent of that prescribed in this code in quality, strength,effectiveness, fire resistance, durability and safety.Similar provisions are contained in the Uniform Codes, the National Codes, and the Standard Codes.This acceptance criteria has been issued to provide all interested parties with guidelines for demonstrating compliancewith performance features of the applicable code(s) referenced in the acceptance criteria. The criteria was developed andadopted following public hearings conducted by the ICC-ES Evaluation Committee, and is effective on the date shownabove. All reports issued or reissued on or after the effective date must comply with this criteria, while reports issued priorto this date may be in compliance with this criteria or with the previous edition. If the criteria is an updated version from theprevious edition, a solid vertical line ( ) in the margin within the criteria indicates a technical change, addition, or deletionfrom the previous edition. A deletion indicator ( ) is provided in the margin where a paragraph has been deleted if thedeletion involved a technical change. This criteria may be further revised as the need dictates.ICC-ES may consider alternate criteria, provided the report applicant submits valid data demonstrating that thealternate criteria are at least equivalent to the criteria set forth in this document, and otherwise demonstrate compliancewith the performance features of the codes. Notwithstanding that a product, material, or type or method of constructionmeets the requirements of the criteria set forth in this document, or that it can be demonstrated that valid alternate criteriaare equivalent to the criteria in this document and otherwise demonstrate compliance with the performance features of thecodes, ICC-ES retains the right to refuse to issue or renew an evaluation report, if the product, material, or type or methodof construction is such that either unusual care with its installation or use must be exercised for satisfactory performance,or if malfunctioning is apt to cause unreasonable property damage or personal injury or sickness relative to the benefits tobe achieved by the use of the product, material, or type or method of construction.Acceptance criteria are developed for use solely by ICC-ES for purposes of issuing ICC-ES evaluation reports.Copyright 2010
ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY SHAKETABLE TESTING OF NONSTRUCTURAL COMPONENTS (AC156)1.0INTRODUCTION1.1 Purpose: The purpose of this criteria is toestablish minimum requirements for the seismiccertification by shake-table testing of nonstructuralcomponents to be recognized in ICC Evaluation Service,LLC, evaluation reports in accordance with the 2006 or2009 International Building Code (IBC). The basis ofrecognition is IBC Section 104.11.Rp Component response modification factor.Rp represents the energy absorptioncapability of the component structure andits attachments, set forth in Table 13.5-1or 13.6-1 of ASCE 7.Ip Component importance factor, as set forthin Section 13.1.3 of ASCE 7. AFLX-H Horizontal spectral acceleration calculatedfor flexible components.The reason for the development of this criteria is toprovide detailed procedures for seismic certification bytesting of nonstructural components as an alternative tocode-prescribed requirements.AFLX-V Vertical spectral acceleration calculatedfor flexible components at z/h 0.ARIG-H Horizontal spectral acceleration calculatedfor rigid components.1.2 Scope: This acceptance criteria is applicable forshake-table testing of nonstructural components that havefundamental frequencies greater than or equal to 1.3 Hz,as permitted by Section 13.2.5 of ASCE 7. This criteria isnot intended to evaluate effects of relative displacementson nonstructural components as required by Section13.3.2 of ASCE 7. Testing done in accordance with thiscriteria is intended to support data for the seismiccertification of architectural, mechanical, electrical andother nonstructural systems, components, and elementspermanently attached to structures, as specified in Section1708.4 of the 2009 IBC or Section 1708.5 of the 2006 IBC,and Section 13.2 of ASCE 7.1.3ARIG-V Vertical spectral acceleration calculatedfor rigid components at z/h 0.ap In-structurecomponentamplificationfactor. The ap represents the dynamicamplification of the component at thefundamental frequency of the buildingstructure.Fp Horizontal seismic design force centeredat the component’s center of gravity, anddistributed relative to the equipment’smass distribution (lbf or N).Wp Component operating weight (lbf or N).Codes and Referenced Standards:1.3.12009 and 2006 International Building Code (IBC), International Code Council.3.01.3.2 ASCE Standard, SEI/ASCE 7-10, MinimumDesign Loads for Buildings and Other Structures,American Society of Civil Engineers.3.1 Attachments: The means by which componentsare secured or restrained to the supporting structure orfoundation. Examples may include anchor bolting, weldedconnections, mechanical fasteners and isolators.1.3.3 ASCE Standard, SEI/ASCE 7-05, MinimumDesign Loads for Buildings and Other Structures,American Society of Civil Engineers.3.2 Biaxial Test: A dynamic test in which the testspecimen is subjected to acceleration in one principalhorizontal axis and the vertical axis simultaneously. Thehorizontal and vertical acceleration components arederived from two different input signals that are phaseincoherent.1.3.4 FEMA 461, Interim Testing Protocols forDetermining the Seismic Performance Characteristics ofStructural and Nonstructural Components, June 2007,Federal Emergency Management Agency.3.3 Build-hold-decay (BHD): The time intervalenvelope (5 0 / – 3 seconds, 20 6 / – 0 seconds and 5 0 / – 3 seconds, respectively) imposed on the drivesignal of the shake table to simulate the nonstationarynature of an earthquake event. The build time includestime necessary for acceleration ramp-up, the hold timerepresents the earthquake strong motion time duration,and the decay time includes the de-acceleration ring downtime. A straight linear approximation is acceptable.1.3.5 IEEE Standard 344-2004, IEEE Recommended Practice for Seismic Qualification of Class 1EEquipment for Nuclear Power Generating Stations, IEEE.2.0NOMENCLATURE:The following symbols and notations have the notedmeaning in this document:SDS Design spectral response acceleration atshort period, as determined in Section1613.5.4 of the IBC.z Height of structure (in feet or mm) withrespect to grade, at point of attachment ofthe component. For items at or below thebase, z shall not be taken to be less than0.0.h Average building/structure roof height (infeet or mm) relative to the base elevation.z/h Height factor ratio. For nonstructuralcomponents located at grade or below, z/h 0.DEFINITIONS:3.4 Damping: An energy dissipation mechanism thatreduces the amplification and broadens the vibratoryresponse in the region of resonance in the frequencydomain. Damping is expressed as a percentage of criticaldamping. This criteria is based on 5 percent of criticaldamping.3.5 Flexible Component: Component, including itsattachments and force-resisting structural members,having a fundamental period greater than 0.06 second(less than 16.67 Hz).2
ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY SHAKE-TABLETESTING OF NONSTRUCTURAL COMPONENTS (AC156)3.6 Component Force-resisting System: Thosemembers or assemblies of members, including braces,frames, struts and attachments that provide structuralstability for the connected components and transmit allloads and forces between the component and thesupporting structure or foundation.3.20 Zero Period Acceleration (ZPA): The peakacceleration of motion time-history that corresponds to thehigh-frequency asymptote on the response spectrum. Thisacceleration corresponds to the maximum peakacceleration of the time history used to derive thespectrum. For use in this acceptance criteria, the ZPA isassumed to be the acceleration response at 33.3 Hz orgreater.3.7 Octave: The interval between two frequencies thathave a frequency ratio of 2.4.03.8 One-third Octave: The interval between two1/3frequencies that have a frequency ratio of 2 .Sections 4.1 through 4.6 detail the necessary informationto be provided for each UUT. Section 4 shall be acomplete document, submitted by the UUT manufactureror the manufacturer’s representative and included as anappendix to the Test Plan described in Section 6.1.3.9 One-sixth Octave: The interval between two1/6frequencies that have a frequency ratio of 2 .3.10 Required Response Spectrumresponse spectrum generated using thenormalized spectra detailed in Sectionacceptance criteria. The RRS constitutes abe met.UUT REQUIRED INFORMATION(RRS): Theformulas and6.5.1 of thisrequirement to4.1 Manufacturer and Testing Laboratory ContactInformation: The following contact information shall bespecified:4.1.13.11 Ring-down Time: The time required for vibrationof the shake table to decrease to a negligible levelfollowing excitation.Manufacturer’s contact information as follows:Manufacturer: Company name.Address: Company address.3.12 Rigid Component: A component, including itsattachments and force-resisting structural members,having a fundamental period less than or equal to 0.06second (greater than or equal to 16.67 Hz).Primary contact: Representative’s 3 Subassemblies: A grouping or assemblage ofsub-components and/or structural elements that requireattachment to the component’s primary force resistingsystem to achieve structural stability.E-mail: Representative’s e-mail address.4.1.2follows:Testing laboratory’s contact information asTesting Laboratory: Laboratory name.3.14 Seismic Capacity: Seismic capacity of acomponent, for the purposes of this criteria, is defined ascapacity, associated with the component’s internalstructure and its attachments, to resist seismically inducedforces and deformations, and maintain structural integrity.Post-test functionality shall be maintained for componentswith Ip 1.5,Address: Laboratory address.Primary contact: Representative’s ail: Representative’s e-mail address.3.15 TestResponseSpectrum(TRS):Theacceleration response spectrum that is developed from theactual time history of the motion of the shake table test asmeasured by reference control accelerometers mountedon the shake table at a location near the base of the UUT.4.2 UTT Description: A description of the UTT shallbe provided, including the following items:Name: Product nameUUT designation: Short alphanumericdesignator used for plotting and test run purposes.3.16 Transmissibility: The nondimensional ratio of theresponse acceleration amplitude of a system in steadystate forced vibration to the excitation amplitude and isused to characterize resonant modes of structuralvibration. One approach to estimating this value is theratio of the Fourier Transform of the system’s accelerationto that of the excitation.UUTUUT function: A general description of the primaryfunction or end use of the product.Description: A detailed description of the UUTconfiguration. This should include a listing of majorsubassemblies and sub-components (e.g., bills ofmaterial) and any other applicable product differentiation.3.17 Triaxial Test: A dynamic test in which the testspecimen is subjected to acceleration in two principalhorizontal axes and the vertical axis simultaneously. Thetwo horizontal and the vertical acceleration componentsare derived from three different input signals that fication number or serial number.UUT’suniqueDimensions: Height xx in. (mm); Width xx in.(mm); Depth xx in. (mm).Weight: Approximately xxx lbs. (kg) and, if known,center of mass.3.18 Uniaxial Test: A dynamic test in which the testspecimen is subjected to acceleration in one principal axis.The acceleration components are derived from a singleinput signal.Restrictions: Provide any product restrictions orlimitations on use.UUT mounting: Description of mounting methodand configuration, including fastenings as applicable.3.19 Unit Under Test (UUT): The component item tobe certification-tested.Component Importance Factor for Test: Ip X.X3
ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY SHAKE-TABLETESTING OF NONSTRUCTURAL COMPONENTS (AC156)4.3Seismic Parametersmodified to account for this flexibility using a rationalanalytical method. The components from the mountingbrackets to the supporting structure shall have equivalentflexibility and strength to what is used in the componentcertification test and may be certified by a supportinganalysis.The seismic parameters used to establish maximumUUT seismic test requirements shall be provided asshown in Table 1 below.TABLE 1—SHAKE TABLE TEST PARAMETERSBUILDINGTESTCODECRITERIA SDS (g)IBC 20**HORIZONTAL4.5.3 Subassemblies: A rationale shall be providedexplaining that the selected UUT’s subassemblies arerepresentative of production hardware and offer the leastseismic capacity of the UUT compared to othersubassembly options that are available within the productline being qualified. The major subassembly componentsshall be included in the UUT. These components shall bemounted to the specimen structure at locations similar tothose specified for proposed installations. Thecomponents shall be mounted to the structure using thesame type of mounting hardware specified for proposedinstallations. Substitution of nonhazardous materials andfluids is permitted for verification of components orsubassemblies that contain hazardous materials or fluids,provided the substitution does not reduce the functionaldemand on the component or subassembly.VERTICALz/h AFLX-H ARIG-H AFLX-VARIG-VICC-ESAC1564.4 Functionality Requirements: A listing anddetailed description shall be provided of the functionalityrequirements and/or tests used to verify pre- and postseismic-testing functional compliance of components.Each test and/or requirement should be listed as aseparate line item.4.5 Component Product Line Extrapolation andInterpolation: Testing every single configuration of agiven component product line may not be feasible.Therefore, it may be necessary to select test specimensthat adequately represent the entire component productline.4.5.4 Mass Distribution: A rationale shall beprovided explaining that the selected UUT’s massdistribution is one contributing to the least seismic capacityof the UUT compared to other mass distribution optionsthat are available within the product line being qualified.The weight and mass distribution shall be similar to thetypical weight and mass distribution of the componentbeing represented. Weights equal to or greater than thetypical weight shall be acceptable.Details for establishing a test plan shall taken fromrequirements set forth in the applicable acceptance criteriafor product.The following criteria shall be used to establish UUTconfiguration requirements for representing a componentproduct line (UUT configuration rationale shall beprovided):4.5.5 Component Variations: A rationale shall beprovided explaining that the selected UUT’s overallvariations contribute to the least seismic capacity of theUUT compared to other variations that are available withinthe product line being qualified. Other componentvariations, such as number of units/components inproduction assemblies, indoor and outdoor applications,etc., shall be considered in the component product lineextrapolation and interpolation rationalization process.4.5.1 Structural Features: A rationale shall beprovided explaining that the selected UUT’s structuralconfigurations are offering the least seismic capacitycompared to other options that are available within theproduct line being qualified. The UUT’s force-resistingsystems shall be similar to the major structuralconfigurations being supplied in the product line. If morethan one major structure is a configurable option, thenthese other structural configurations shall be considered inthe component product line extrapolation and interpolationrationalization process.4.6 Installation Instructions:include the following items:1.field.4.5.2 Mounting Features: A rationale shall beprovided that explains that the selected UUT’s mountingconfigurations are offering the least seismic capacitycompared to other mounting options that are availablewithin the product line being qualified. The configurationmounting of the UUT to the shake-table shall simulatemounting conditions for the product line. Seismic testing ofcomponents may be conducted using the smallestdiameter tie-down bolt size (or minimum weld size) thatcan be accommodated with the provided tie-downclearance holes (or base structural members) on thecomponents. If several mounting configurations are used,they shall be simulated in the test.InstructionsshallDescription of how the UUT will be installed in the2. Description of how the UUT will be installed duringthe certification test.5.0 TESTING LABORATORIES AND REPORTS OFTESTS:5.1 Testing Laboratories: Testing laboratories shallcomply with Section 2 of the ICC-ES Acceptance Criteriafor Test Reports (AC 85) and Section 4.2 of the ICC-ESRules of Procedure for Evaluation Reports.5.2Test Reports:5.2.1General: Test reports shall comply with AC85.Use of specific test results shall be limited to the mountingtype and configuration. Where individual components of amulti-component system are certified by test, the flexibilityof the supporting structure in the component to point ofanchorage shall be replicated in the test setup.Alternately, the input motions for the test setup may be5.2.2Specific: Reports of all tests noted in Section6 are required. In addition, the following items must bereported:5.2.2.1 Identification of component being qualifiedalong with their dimensions and weights.4
ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY SHAKE-TABLETESTING OF NONSTRUCTURAL COMPONENTS (AC156)5.3 Product Sampling: Sampling of components fortests under this criteria shall comply with Section 3.1 ofAC85.Foracustomproductline,wheresubcomponents in each assembled product can potentiallybe different, all qualified subcomponents along with theirdimensions and weights shall be listed. If there is morethan one manufacturer or material for any subcomponent,each manufacturer’s subcomponent for each material shallbe treated as a separate product. Different operatingconditions for components for which equipment is certifiedshall be listed.6.06.1 Seismic Certification Test Plan: The UUT shallbe subjected to a seismic certification test program,considering all elements noted in this section. The seismiccertification test plan is intended to satisfy therequirements of Section 1708.4 of the 2009 IBC orSection 1708.5 of the 2006 IBC and Section 13.2 of ASCE7 for components. References for setting the test plan andobjectives include ANSI/IEE 344 and FEMA 461.5.2.2.2 Seismic parameters and derived RRSlevels for the component that is being qualified inaccordance with Section 4.3.5.2.2.3 Results of pre- and post-test structuralintegrity and functionality requirements and/or testing.6.2 Pre-test Inspection: Upon arrival at the testfacility, the UUT shall be visually examined and resultsdocumented by the testing laboratory, to verify that nodamage has occurred during shipping and handling.5.2.2.4 Testing facility location and a list ofobservers present for test/functionality verification.6.3Pre-test Functional Compliance Verification:Functionality requirements and/or tests, as specified inSection 4.4, shall be performed by an accredited testinglaboratory to verify pre-test functional performance.Functional testing could be performed at either the testfacility or at the UUT manufacturing facility. Testdescription and results shall be documented inaccordance with Section 5.2 (Test Reports).5.2.2.5 Testing equipment description, includingsize and capacity of the shake table and verification ofcalibration of instruments used in the test.5.2.2.6 Component mounting details, including allinterface connections.Photographs of component set-up on the shaketable before and after test including detailed photographsof anomalies observed during or after test.6.4 Seismic Simulation Test Setup: Seismic groundmotion occurs simultaneously in all directions in a randomfashion. The requirement is to perform qualification testingin all three principal axes, two horizontal and vertical.However, for certification test purposes, uniaxial, biaxial ortriaxial test machines are allowed in accordance with thefollowing test requirements.5.2.2.7 Results of test data, including proof ofperformance, TRS plots, acceleration time histories of theshake table motion, acceleration transmissibility plots,UUT dimensions and measured weight, etc.5.2.2.7.1 TRS plots in each of the threedirections shall show corresponding RRS, 90 percentRRS, and 130 percent of RRS. Damping ratio used ingenerating RRS and TRS shall be indicated on the TRSplots.TRS plots for each certification test conducted shallbe provided. For traceability, the TRS plots shall referencethe name the corresponding data file.6.4.1 Triaxial, Biaxial, and Uniaxial TestingRequirements: The preferred method of performingtesting is using a triaxial shake table. However, it isrecognized that capable triaxial testing facilities are limitedin number, and this may restrict testing access. Use ofbiaxial or uniaxial testing shall consider componentconfiguration in determining orientations that permit thelargest response to shake table accelerations. Thefollowing requirements shall be used when performingtriaxial, biaxial, or uniaxial testing.5.2.2.7.2 The resonance frequency in each ofthe three directions for each UUT shall be included in thereport similar to Table 2 below.TABLE 2—UNIT UNDER TEST (UUT) RESONANCEFREQUENCYUUTIdentification6.4.1.1 Triaxial Testing: If a triaxial test isperformed, the test shall be performed in one stage withthe two principal horizontal axes and the vertical axis ofthe UUT simultaneously tested.RESONANCE FREQUENCY (Hz)Front-to-BackSide-to-SideSEISMIC CERTIFICATION TEST PROCEDUREVertical6.4.1.2 Biaxial Testing: If a biaxial test isperformed, the test shall be performed in two stages, withthe UUT rotated 90 degrees about the vertical axis for thesecond stage.5.2.2.7.3 Verification that simultaneous shaketable motion in three orthogonal directions are phaseincoherent (statistically independent) shall be provided.6.4.1.3 Uniaxial Testing: If a uniaxial test isperformed, the test shall be performed in three distinctstages, with the UUT rotated after each stage, such thatall three principal axes of the UUT have been tested.5.2.2.8 Test results and conclusions including anyanomalies observed during or after the test, andjustification that the component is still qualified. Resolutionof all significant anomalies, which affect either componentforce resisting system or functionality of components withIp 1.5, shall be addressed in the test report.6.4.2 Weighing: The UUT shall be weighed prior toperforming the Seismic Simulation Tests. The measuredUUT weight shall be recorded in the Test Report as setforth in Section 5.2.5.2.2.9 UUT required information in accordancewith Section 4.0 shall be added to the test report as anappendix.6.4.3 Mounting: The UUT shall be mounted on theshake table in a manner that simulates the intendedservice mounting in accordance with Section 4.5.2. The5
ACCEPTANCE CRITERIA FOR SEISMIC CERTIFICATION BY SHAKE-TABLETESTING OF NONSTRUCTURAL COMPONENTS (AC156)mounting method shall be the same as that recommendedfor actual service, and shall use the minimumrecommended bolt size, bolt type, bolt torque,configuration, weld pattern and type (if applicable), etc.The orientation of the UUT during the tests shall be suchthat the principal axes of the UUT are collinear with theaxes of excitation of the shake table. A description of anyinterposing fixtures and connections between the UUT andthe shake table shall be provided.6.4.4 Monitoring: Sufficient vibration responsemonitoring instrumentation shall be used to allowdetermination of the applied acceleration levels in theprincipal horizontal and vertical axes of the shake table.Reference control accelerometers shall be mounted on theshake table at a location near the base of the UUT.Vibration response monitoring instrumentation shall alsobe used to determine the response of the UUT, at thosepoints within the structure that reflect the UUT’s responseassociated with its structural fundamental frequencies.Placement locations for the response sensors shall be atthe discretion of the UUT manufacturer or themanufacturer’s representative and approved by the testlaboratory prior to testing. Sensors shall be installed,calibrated and approved by the test laboratory prior totesting. The accredited laboratory shall document thelocation, orientation, and calibration of all vibrationmonitoring sensors.FIGURE 1—REQUIRED RESPONSE SPECTRUM,NORMALIZED FOR THE COMPONENTThe required response spectra for both horizontaland vertical directions shall be developed based on theformula for total design horizontal force, Fp, as follows:When the building dynamic characteristics are notknown or specified, the horizontal force requirements shallbe as determined using Equation 13.3-1 of ASCE 7,which reads as follows:6.4.5 Resonant Frequency Search: The resonantfrequency search test is for determining the resonantfrequencies and damping of components. The dataobtained from the search test is an essential part of ancomponent certification; however, the search test does notconstitute a seismic test certification by itself. A low-levelamplitude (0.1 0.05 g peak input; a lower input level maybe used to avoid component damage) single-axissinusoidal sweep from 1.3 to 33.3 Hz shall be performedin each orthogonal UUT axis to determine resonantfrequencies. The sweep rate shall be two octaves perminute, or less, to ensure adequate time for maximumresponse at the resonant frequencies. Transmissibilityplots of the in- line UUT response monitoring sensors shallbe provided along with a table showing resonantfrequencies in accordance with Section 5.2.2.7.2.6.5Fp 0.4a p S DS z 1 2 W p R p I p h The height factor ratio (z / h) accounts for abovegrade-level component installations within the primarysupporting structure and ranges from zero at grade–levelto one at roof level, essentially acting as a force increasefactor to recognize building amplification as you move upwithin the primary structure. The site-specific groundspectral acceleration factor, SDS, varies per geographiclocation and site soil conditions. The SDS factor is used todefine the general design earthquake response spectrumcurve and is used to determine the design seismic forcesfor the primary building structure. The ratio of Rp over Ip(Rp / Ip) is considered to be a design reduction factor toaccount for inelastic response and represents theallowable inelastic energy absorption capacity of thecomponent’s force-resisting system. During the seismicsimulation test, the UUT will respond to the excitation andinelastic behavior will naturally occur. Therefore, the ratio(Rp / Ip) shall be set equal to 1, which is indicative of anunreduced response. The importance factor, Ip, does notincrease the seismic test input motion but does affect therequirement for the UUT to demonstrate a level offunctionality following seismic simulation testing, and isused in this criteria to determine post test UUTfunctionality compliance in accordance with Section 6.7.The component amplification factor, ap, acts as a forceincrease factor by accounting for probable amplification ofresponse associated with the inherent flexibility of thenonstructural component. The component amplificationfactor, ap, shall be taken from the formal definition offlexible and rigid components. By definition, forfundamental frequencies less than 16.7 Hz thecomponent is considered flexible (maximum amplificationap 2.5), which corresponds to the amplified region of theMultifrequency Seismic Simulation Tests:6.5.1 Derivation of Seismic RRS: The componentearthquake effects shall be determined for combinedhorizontal and vertical load effects. The required responsespectra for the horizontal direction shall be developedbased on the normalized response spectra shown inFigure 1, and the formula for total design horizontal force,Fp. The required response spectra for the vertical directionshall be developed based on two-thirds of the ground-levelbase horizontal acceleration. The seismic parametersspecified in Section 4.3 shall be used to calculate the RRSlevels as defined by AFLX-H , ARIG-H, AFLX-V, and ARIG-V. TheRR
AC156 Approved October 2010 Effective November 1, 2010 Previously approved December 2006, June 2004, and January 2000 PREFACE Evaluation reports issued by ICC Evaluation Service, LLC (ICC-ES), are based upon performance features of theFile Size: 278KBPage Count: 8Explore further(PDF) ASCE 7-10 Feng Rong - Academia.eduwww.academia.eduAC156 - ICC Evaluation Service, LLC (ICC-ES)icc-es.orgMinimum Design Loads for Buildings and Other Structureswww.waterboards.ca.govRecommended to you b
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Hotell För hotell anges de tre klasserna A/B, C och D. Det betyder att den "normala" standarden C är acceptabel men att motiven för en högre standard är starka. Ljudklass C motsvarar de tidigare normkraven för hotell, ljudklass A/B motsvarar kraven för moderna hotell med hög standard och ljudklass D kan användas vid
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EXAMPLE 9 SEISMIC ZONE 1 DESIGN 1 2018 Design Example 9 Example 9: Seismic Zone 1 Design Example Problem Statement Most bridges in Colorado fall into the Seismic Zone 1 category. Per AASHTO, no seismic analysis is required for structures in Zone 1. However, seismic criteria must be addressed in this case.
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