悬挂结构地震动力反应分析计算  

Analysis and calculation of seismic responses for suspension structures

作　　者：高林[1,2] 李长洪[1] 葛楠[2] 陈海彬[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]河北联合大学地震工程研究中心,唐山063009

出　　处：《北京科技大学学报》2014年第5期701-707,共7页Journal of University of Science and Technology Beijing

摘　　要：利用拉格朗日方程建立了核筒悬挂结构体系运动方程.考虑到大位移非线性的影响,采用Runge-Kutta方法求解体系地震动力响应时程.计算结果表明悬挂体系能明显减小楼层层间位移、速度及加速度,减震效率接近90%.核筒截面抗弯刚度对其截面内力与筒身水平位移影响最显著,截面内力随其增加而增加.吊杆长度及阻尼器的阻尼系数对截面内力的影响较小.阻尼系数对层间位移及截面内力存在优化值.楼层位移、楼层速度及加速度随阻尼系数减小单调减小.ABSTRACT An exact motion equation for core-wall suspension structure systems was establish by using the Lagrange equation. Con-sidering the effect of large displacement with nonlinearity, the seismic dynamic response time history of the system was solved by the Runge-Kutta method. Calculation results show that the system can significantly decrease the inter-storey drift, velocity and accelera-tion, and the seismic mitigation efficiency is approximately 90%. Sectional bending stiffness has the most significant influence on the sectional force and translational deflection, and the sectional force increases with increasing sectional bending stiffness. However, sus-pender length and the damp coefficient of storey dampers have little influence on the sectional force. The damp coefficient has optimum values to the inter-storey drift and sectional force. The storey drift, velocity and acceleration exhibit monotonous decrease with the damp coefficient.

关 键 词：悬挂结构 地震响应 阻尼 抗弯刚度 

分 类 号：TU375.4[建筑科学—结构工程]