Research Initiation: Role of Building Overstrength in Developing Seismic Response Spectra

本课题为1988年度立项研究项目。本研究的目的是：(1)对典型建筑结构的超强度进行校核；(2)将超强度纳入非弹性抗震设计谱的推导。根据ATC 3-06抗震规定，对地震高风区的一系列典型多层建筑结构进行设计。这些结构的强度将使用非线性结构分析计算机程序计算。超强度将通过比较实际和标称设计屈服强度来评估。在此基础上，结合第一阶段评估的阻尼、延性和超强，构建不同地震记录下的非弹性反应谱。如果不考虑超强度，目前生成非弹性设计谱的方法是半经验的。通过本研究，将建立合理的建筑非弹性抗震设计谱。

This is a Research Initiation project for FY 88 1. The objectives of this research are: (1) to calibrate the overstrength of typical building structures; and (2) to incorporate the overstrength into the derivation of inelastic seismic design spectra. A series of typical multi-story building structures in high seismic risk regions will be designed according to the ATC 3-06 seismic provisions. The strengths of these structures will be calculated using nonlinear structural analysis computer programs. The overstrength will be evaluated by comparing the actual and the nominal design yield strengths. Then the inelastic response spectra will be constructed for different earthquake records by considering the damping, ductility and overstrength evaluated from the first stage. Without considering the overstrength, current procedures for generating inelastic design spectra are semi- empirical. Rational inelastic seismic design spectra for buildings will be developed through this research.