基于目标反应谱和包线的地震动合成  

Artificial ground motion based on target response spectra and envelope

作　　者：徐国栋[1] 史培军[2] 周锡元[3] 

机构地区：[1]防灾科技学院,河北三河101601 [2]北京师范大学减灾与应急管理研究院,北京100875 [3]北京市工程抗震与结构诊治重点实验室,北京工业大学,北京100022

出　　处：《地震工程与工程振动》2010年第1期1-7,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家科技支撑计划(2006BAD20B03);自然科学基金重大计划(90715038)

摘　　要：本文给出了以目标反应谱和目标包线函数为双目标函数的人工地震动合成方法,不仅使人工地震动符合目标反应谱,还在迭代过程中对地震动波形进行调整,使之基本符合目标包线函数,并消除了加速度时程的基线偏移,使速度时程和位移时程更为合理。本文认为当研究非线性结构体系的动力反应规律时,有必要对输入的人工地震动时程的反应谱和包线均进行比较准确的控制,使人工地震动时程符合多个统计特征。The authors put forward a method that takes the response spectrum and the enveloping curve as the double target functions to synthesize the artificial ground motion. The method not only makes the response spectrum of the artificial ground motion comply with the target spectrum, but also in the iterative process adjusts the ground motion wave-shape to conform to the goal enveloping curve function approximately, and eliminates the base-line shift in the acceleration time history, then makes the velocity and displacement time histories of ground motion more reasonable. The authors argue that it may be necessary to make the artificial ground motions accord with both the target response spectrum and the target enveloping function, when the dynamic response characteristics of certain nonlinear structural system are studied.

关 键 词：反应谱 包线 人工地震动 

分 类 号：P315.9[天文地球—地震学]