并联基础隔震体系的参数优化  

PARAMETER OPTIMIZATION OF PARALLEL BASE-ISOLATED SYSTEM

作　　者：荣强[1] 程文瀼[2] 

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]东南大学土木工程学院,江苏南京210096

出　　处：《工程力学》2009年第10期140-146,共7页Engineering Mechanics

摘　　要：以耗能比例因子最大为目标函数,同时考虑隔震层最大滑移位移、残留位移和最大基底剪力系数等约束条件,分别输入不同场地不同幅值的地震波,探讨了屈服剪力系数和第二隔震周期的最优取值范围。研究表明:屈服剪力系数的最优取值范围因不同场地不同幅值的地震波而不同;对Ⅰ类―Ⅳ类场地,隔震体系在低幅值和高幅值罕遇地震作用下,四个体系地震反应指标对第二隔震周期的变化规律大致相同,建议第二隔震周期取4s―6s为宜。In this paper, the optimal ranges of the yield shear coefficient and the second isolation period are discussed by seismic analysis of structures excited by earthquake ground motions. The largest dissipative energy scale factor is used as the objective function, and constraint conditions include maximal sliding displacement of base-isolated layer, residual displacement and maximal base shear coefficient. It is found that the optimal range of shield shear coefficient relies on earthquake sites and earthquake amplitudes. The four earthquake response indexes for second isolation period are basically in uniform variation under four different sites and earthquake amplitudes. The proposed range of the second isolation period is from four seconds to six seconds.

关 键 词：基础隔震 并联隔震 参数优化 耗能比例因子 屈服剪力系数 第二隔震周期 

分 类 号：TU352.1[建筑科学—结构工程]