性态设计方法及能力-需求曲线方法的几个问题

Several Problems about Performance Based Design andCapacity-Demand-Diagram Methods

简要回顾了性态设计的发展历程,明确了性态设计的相关概念及其关系,剖析了性态设计与我国现行抗震设防原则与思想间的关系,指明了我国抗震设计规范与性态设计接轨的方向,讨论了目前引起较多关注的能力-需求曲线设计方法中的结构模型、水平加载模式、能力-需求曲线交角及P-Δ效应影响等问题。

The development of performance based design method (PBD) is briefly reviewed. The relationship between PBD and the principle of seismic design in current Chinese code is analyzed and the direction to introduce the PBD method to the Chinese code for seismic design of building is given. Then, some problems about the capacity-demand-diagram methods which attracted much attention are discussed, such as the structural models for analysis, the shapes of lateral load distribution for capacity curves, the angles formed by capacity curve and demand curve and P-Δ effects for capacity curves.