结构动力弹塑性分析地震波的选取原则

Selection principle of earthquake waves in structural dynamic elasto-plastic analysis

总结分析国内外地震波研究成果,结合中国相关规范,提出地震波选取原则:根据结构动力特性、反应谱曲线初选地震波,对结构进行弹性时程分析;然后对其分析结果依据振型分解反应谱法基底剪力的"下限"要求以及波的离散性筛选地震波,确定动力弹塑性时程分析的地震波;最后对弹塑性分析计算过程及结果进行分析判断,确保分析结果真实可靠.理论分析和具体工程实例表明,利用这一原则选取地震波,概念比较清晰,实施相对简单,有利于在结构动力弹塑性分析过程中迅速选择合适的地震波.

By means of summarizing and analyzing the investigation results of seismic wave domes and a- broad and incorporating with relevant codes, the selection principle of earthquake wave was presented and preselected according to structural dynamic property and response spectrum curve to carry out the struc- tural elastic time history analysis. Then based on the analysis result, the earthquake wave was screen-se- lected based on the bottom shear limit requirement of mode-superposition response spectrum method and discreteness of the wave and the seismic wave of dynamic elasto-plastic time history analysis was deter- mined. Finally, the elasto-plastic analysis calculation process and its result were analyzed and determined to ensure the reliability and validity of the result. It was shown by theoretical analysis and specific exam- ples in engineering that the concept of seismic wave selection with the proposed principle was clear, its im- plementation was simple, and was beneficial to select proper waves quickly in structural elasto-plastic dy- namic analysis.