摘要
首先建立了结构-土相互作用体系的运动方程,给出了等效体系的频率和阻尼比与基础固定结构与地基土的频率和阻尼比之间的关系式.由于新规范的地震影响系数α的取值一般要求阻尼比在0.01～0.2之间,考虑结构-土相互作用后体系的频率会减小,阻尼比可能会超出范围,因此在求α时必须用结构-土相互作用体系的频率和阻尼比,并且用阻尼比影响因子Ba进行修正,在求得总地震作用后再根据底部剪力法得到各质点的地震作用取值,并通过实例说明该方法的应用.
In this paper, the dynamic equations of soil-structure interaction system are established first. Then, the relation of frequency and damp ratio of equivalent system to that of base fixed structure and groundwork base is given. Because the earthquake affect coefficientin new code ranges from 0.01 to 0. 2, and the system＇s frequency will minish and damp ratio will be out of range after considering structure-soil interaction. So we must use the structure-soil interaction system＇s frequency and damp ratio to calculate the , and the then is revised by damp affect coefficient. After gaining the total earthquake action, the earthquake action of each mass point is calculated according to bottom shear method. At last, an example is given to show how to use this method.
出处
《广西工学院学报》
CAS
2005年第3期36-38,63,共4页
Journal of Guangxi University of Technology
基金
广西自然科学基金项目[桂科自0481001]
同济大学土木防灾国家重点实验室访问学者基金[教技司(2000)123号]
广西工学院博士基金联合资助
