核筒-悬挂体结构地震动力反应分析  

An Analytical Study on Seismic Responses for Core-tube with Suspension Structures

作　　者：李延涛[1] 姚丽婷[2] 苏幼坡[2] 葛楠[2] 

机构地区：[1]河北工业大学,天津300401 [2]河北联合大学,河北唐山063009

出　　处：《工程抗震与加固改造》2014年第2期100-106,共7页Earthquake Resistant Engineering and Retrofitting

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,考虑了大位移非线性的影响,采用Longe-Kuta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及筒身水平位移影响最显著,截面内力随其增加而增加,而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核筒内力存在优化值,楼层位移、楼层速度及加速度随阻尼系数减小单调减小。Exact motion equation is established for core-tube suspension structure from Lagrange Equation,with non-linearity from large displacement being included.The equation is solved with Longe-Kuta method.It is shown that earthquake dynamic response for interstorey drift,velocity and acceleration could be decreased significantly,with efficiency of seismic mitigation being approximately 90％.Flexural rigidity exerts dominant influence on its section forces and translational deflection,which increase with the rigidity.While the length of suspender and damp coefficient of storey dampers exerts little influence on them.The storey drift,velocity and acceleration exhibit monotonous decrease with damp coefficient.

关 键 词：悬挂结构 LAGRANGE方程 龙格-库塔法 广义坐标 非保守力 

分 类 号：TU399[建筑科学—结构工程] TU352.11