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目前,我国的抗震设计是按照反应谱理论进行的,世界各国的抗震设计也大致如此。这种分析方法是以经典的精确性数学为基础,把地震动的影响当做一种确定性的荷载施加在结构上进行分析,研究它的响应。这种以经典的精确性数学来描述地震动的作用及结构的响应,在一定程度上方便了抗震设计,易于工程技术人员理解和使用,但是它不能很合理地反映地震响应的实质,也往往不能正确地解释震害现象。众所周知,在我国现行抗震设计规范中给出的反应谱依赖于两个参数,即地震烈度和场地士类别。地震烈度是指某一地区、地面及房屋建筑等遭受到一次地震影响的强弱程度。就地震的影响而言,由于人类对地震本身的认识还存在着许多未知的领域,如:各分量的共同作用,彼此之间的影响,地面运动的各点差异,地震波的传播等还有待人们进一步地研究。亦即,人们对地震本身的认
At present, China’s seismic design is based on the response spectrum theory, and the seismic design of the countries around the world is also roughly the same. This analysis method is based on the classical precision mathematics. The effect of ground motion is applied as a deterministic load on the structure for analysis and its response is studied. This kind of classical accuracy mathematics to describe the effect of ground motion and the response of the structure, to a certain extent, ease the seismic design, easy for engineers and technicians to understand and use, but it can not reflect the essence of seismic response very reasonably, and often The earthquake damage cannot be explained correctly. As we all know, the response spectrum given in the current seismic design code of our country depends on two parameters, namely the seismic intensity and the category of the field. Seismic intensity refers to the extent to which an area, ground, and buildings have suffered an earthquake. In terms of the impact of earthquakes, there are still many unknown areas due to human understanding of the earthquake itself. For example, the joint effects of various components, the influence of each other, the differences in ground motion, and the propagation of seismic waves have yet to be resolved. Further study. That is, people recognize the earthquake itself.