Evaluation of various methods of FEMA356 compare to FEMA440

摘要

The purpose of this paper is to evaluate the performance-based procedures in the FEMA356 which is used for vulnerability assessment of existing buildings. The FEMA 356 contained four analysis methods. These methods are linear and nonlinear static / dynamic analysis. For this evaluation, two programs are studied (1) the Displacement Coefficient Method and (2) the buildings designed by UBC97. In this study, several special steel moment-resisting buildings are designed according to the UBC97 requirements and their vulnerability is assessed. These buildings are from 1 story to 20 stories. The designs of these buildings perform by AISC requirement. The seismic load for design of these buildings extract from UBC 97. The UBC 97 contained two analysis methods. These methods are linear static / dynamic analysis. Analytical results show that some columns do not satisfy the life safety performance in the design hazard level. Moreover, the target displacement estimated by the Displacement Coefficient Method is larger than the maximum displacement calculated by nonlinear dynamic analysis.