建筑抗震设计基本概念的宏观理解

MACRO-SCALE UNDERSTANDING OF THE BASIC CONCEPT OF BUILDING SEISMIC DESIGN

建筑抗震设计概念中,地震动激发结构实体自振,把自振反推成有规律且便于分析的静止力形式,即水平地震作用标准值,其可间接地等效反映地震动。再把地震作用标准值等效施加到静止的实体质点上进行结构分析,最终得到建筑整体或构件的地震作用效用。结构分析的通用方法是“振型分解反应谱法”,并在该法的基础上引申出“考虑扭转耦联的振型分解反应谱法”。

In the concept of seismic design for buildings,seismic motion excites the natural vibration of the structural entity,which is then extrapolated into a regular and easily analyzable static force form,namely the standard value of horizontal seismic action,indirectly and equivalently reflecting seismic motion.Then apply the seismic action standard value equivalently to a stationary solid particle for structural analysis,and obtain the seismic effect utility of the entire building or its components.The general method for structural analysis is the"mode decomposition response spectrum method",and based on this method,the"mode decomposition response spectrum method considering torsional coupling"is extended.