NEHRP Recommended Revisions to ASCE/SEI 41-17 Seismic Evaluation and Retrofit of Existing Buildings (FEMA P-2208)
Date Published: August 20, 2023
The resource discusses the NEHRP Recommended Revisions to ASCE/SEI 41-17 pertaining to the seismic evaluation and retrofit of existing buildings, specifically focusing on revisions to concrete structural wall stiffness, modeling guidance, and flexure-controlled provisions. The document addresses improvements to existing provisions for flexure-controlled walls, detailing shortcomings in current modeling parameters, and proposes updated structural wall provisions. It outlines a new methodology for determining foundation moment capacity, includes restructuring of structural wall chapters, and presents new provisions related to wall sliding mechanisms, modeling techniques, and impact-resistant materials.
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Details
Disaster PhaseBefore
File TypePDF
LanguageEnglish
Category
AssessmentDesign & ConstructionMitigation & PlanningTechnical Guidance
Audience
Building ProfessionalsBuilding ProfessionalsBuilding Professionals
Hazard Type
EarthquakeEarthquake
Tags
Seismic evaluationModeling ParametersURM Buildingsheavy wall buildingschecklist statementslinear limitation provisionbuilding evaluationNEHRPvertical elementsshear-friction strengthboundary longitudinal reinforcementseismic design parameterssubdiaphragm provisionsSuperstructure ModelingTier 1 screeningAcceptance CriteriaTier 2 evaluationunreinforced masonryacceptance criteriaFlexural StiffnessTier 1 screening procedurewood sheathingbackbone curvesSecondary componentsforce-displacement relationshipsseismic evaluationsretrofit situationsretrofitFoundation Evaluationstability assessmentExisting BuildingsAcceptance criteriastructural elementsASCE/SEI 41-17foundation provisionsstructural performanceSeismic RetrofitATC-140 Project SeriesShallow FoundationsConcrete Moment Frame Buildingsflexure-controlled provisionsexisting buildingsNonlinear Analysis ProceduresAccidental torsionFEMA P-2208common building typesnonlinear proceduresh/t ratiosConcrete Structural Wallsmoment frameretrofit approachhinge rotation capacitystructural panelconcrete structural wallssoil-structure interactionmodeling parametersout-of-plane forcesdiaphragm componentsBuilding TypesShear-Friction StrengthDampingcompression failureDeformation-Controlled ActionsSeismic accelerationsbare steel deck diaphragmsstructural collapse risk assessmentflexural stiffnessETABS modelsretrofittingAcceptance Ratiosnonlinear analysisRetrofitdiaphragmOut-of-plane stabilityshear-controlled wallsretrofitting criteriaflexible base modelingbuilding performancestructural wallsLinear Proceduresnonlinear modelingtension-fractureASCE/SEI 41-13moment capacityMoment CapacityForce-controlled actionsETABS softwaregrade beamsnon-compliant conditionswood structural panel diaphragmssoil bearing capacityseismic evaluationaxial failurebuilding retrofitNonlinear analysisdiaphragm systemsURM wallsstructural irregularitiesExperimental Datalinear analysis proceduresConcrete Wallsfiber modelsChange ProposalsFoundation ProvisionsShear-Controlled Wallsearthquake loadingstructural componentflexible diaphragmsreinforcement yield strengthdrift limitsFEMAPenner and Elwoodstructural engineeringStructural PerformanceDeformation-controlled actionsRedistribution of Forcesout-of-plane stiffnessSoil Pressure DistributionPerformance ObjectiveSeismic Evaluationshallow foundationsASCE/SEI 41-23Nonlinear Procedures