Assessment of Improved Nonlinear Static Procedures in FEMA-440
- 1 September 2007
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Structural Engineering
- Vol. 133 (9), 1237-1246
- https://doi.org/10.1061/(asce)0733-9445(2007)133:9(1237)
Abstract
Nonlinear static procedures (NSPs) presented in the FEMA-440 document are evaluated for nondegrading three- to nine-story reinforced concrete moment-resisting frame systems. Evaluations are based on peak single-degree-of-freedom displacement, peak roof, and interstory drifts estimations. A total of 78 soil site records and 24 buildings with fundamental periods varying between are used in 2,832 linear and nonlinear response-history analyses to derive the descriptive statistics. The moment magnitude of the ground motions varies between 5.7 and 7.6. All records are within of the causative fault representing near-fault ground motions with and without pulse signals. The statistics presented suggest that lateral loading patterns used in pushover analysis to idealize the building systems play a role in the accuracy of NSPs investigated. Both procedures yield fairly good deformation demand estimations on the median. Displacement coefficient method (DCM) tends to overestimate the global deformation demands with respect to the capacity spectrum method (CSM). The conservative deformation demand estimations of DCM are correlated with the normalized lateral strength ratio, . The CSM tends to overestimate the deformation demands for the increasing displacement ductility, .
This publication has 11 references indexed in Scilit:
- Seismic response assessment of a stiff structureEarthquake Engineering & Structural Dynamics, 2006
- Determining Equivalent Linear Parameters for Use in a Capacity Spectrum Method of AnalysisJournal of Structural Engineering, 2006
- Effect of peak ground velocity on deformation demands for SDOF systemsEarthquake Engineering & Structural Dynamics, 2005
- Statistical Evaluation of Approximate Methods for Estimating Maximum Deformation Demands on Existing StructuresJournal of Structural Engineering, 2005
- Characterization of forward-directivity ground motions in the near-fault regionSoil Dynamics and Earthquake Engineering, 2004
- Inelastic Deformation Ratios for Design and Evaluation of Structures: Single-Degree-of-Freedom Bilinear SystemsJournal of Structural Engineering, 2004
- Comparing the adequacy of alternative ground motion intensity measures for the estimation of structural responsesEarthquake Engineering & Structural Dynamics, 2004
- Building Period Formulas for Estimating Seismic DisplacementsEarthquake Spectra, 2000
- Evaluation of NSP to Estimate Seismic Deformation: SDF SystemsJournal of Structural Engineering, 2000
- Flexural Members with Confined ConcreteJournal of the Structural Division, 1971