一、概况 结构建筑物的设计,目前常用的设计方法为:容许应力设计法、破损阶段设计法、极限状态设计法三种。其中容许应力法在结构设计中用的最多,它是以弹性理论为基础,是以降低材料的使用强度来做为设计依据,即以材料的极限强度去除以一个安全系数所得作为材料的容许应力,所以称容许应力法,它是一种较为保守的设计方法。破损阶段设计法实际也是 I. Overview Design of structural buildings, the commonly used design methods are: allowable stress design method, damage stage design method, limit state design method three. Among them, the allowable stress method is used most in structural design. It is based on the elastic theory and is based on the reduction of the use intensity of the material. It is based on the ultimate strength of the material to remove the allowable stress of the material with a safety factor. , so called the allowable stress method, it is a more conservative design method. The damage stage design method is actually also