A Spectral Approach to the Dynamic Instability Analysis in Earthquake Resistant Design

结构的抗震设计包括考虑重力荷载和横向位移之间的相互作用。这种相互作用被称为P-Delta效应，指的是结构单向屈服的趋势，这可能导致结构的动态不稳定和崩溃。在抗震结构设计中缺乏考虑P-Delta效应的方法。本研究的目的是开发这样一种方法来考虑P-Delta效应和动态不稳定性。该方法基于非弹性谱的定义。前提是P-Delta效应可以通过频谱修改包括在内，其方式类似于用于合并延性和阻尼效应的方法。

The design of a structure for earthquake resistance includes consideration of the interaction between gravity loads and lateral displacements. This interaction, known as the P-Delta effect, refers to a tendency for unidirectional yielding of the structure, which can lead to dynamic instability and collapse of the structure. A methodology to consider P-Delta effects in the design of seismic resistant structures is lacking. The objective of this research is to develop such a methodology to consider the P-Delta effect and dynamic instability. The approach is based on the definition of the inelastic spectrum. The premise is that P-Delta effects can be included through spectrum modification, in a way that is similar to the methods used to incorporate the effects of ductility and damping.