单层球面网壳的粘弹性阻尼器减震控制参数分析  

Parameter analysis of seismic control about Large-scale Single-layer spherical shell with viscoelastic dampers

作　　者：李媛萍[1,2] 张卫[3] 王仕统[4] 

机构地区：[1]暨南大学力学与土木工程系,广东广州510640 [2]暨南大学重大工程灾害与控制教育部重点实验室,广东广州510640 [3]暨南大学电子工程系,广东广州510632 [4]华南理工大学土木与交通学院,广东广州510640

出　　处：《暨南大学学报（自然科学与医学版）》2010年第3期263-267,272,共6页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：国家自然科学基金项目(10872079)

摘　　要：通过数值计算方法,分析了粘弹性阻尼器的特征参数对减震效果的影响规律.考虑阻尼器的等效刚度系数不变而等效阻尼系数改变和等效阻尼系数不变而等效刚度系数改变两种情形,并分别选取加速度峰值为70gal和400 gal的El-Centro波、Taft波和天津波作用于无控和受控单层球壳,利用ANSYS进行非线性动力时程分析,得到球壳受控前后的最大节点位移、杆件的最大轴力、最大支座反力以及不同阻尼器参数情形下的减震系数.结果表明:阻尼器参数决定减震效果的好坏;不同地震波作用下的减震规律有所不同;罕遇地震作用下减震效果更明显.Numerical strategy is performed to investigate the influence of damper＇s parameters to vibration effort.El-Centro wave,Taft wave and Tianjin wave with peak acceleration located at 70gal and 400gal are acted on the single-layer spherical reticulated shell with and without control respectively.Maximum nodal displacements and maximum axial forces as well as maximum support forces are gotten through non-linear dynamic time-history analysis by ANSYS software.Subsequently,the vibration reduction coefficients under different parameters are calculated.The results show that it is feasible to control the vibration arisen from earthquake by viscoelastic dampers,but the control effort is essentially influenced by the dampers＇ parameters;the efforts of vibration reduction under different seismic waves are somewhat different,and it indicates that the damping effect is more obvious under rare earthquake.

关 键 词：单层球面网壳 粘弹性阻尼器 减震控制 常遇地震 罕遇地震 

分 类 号：TU352[建筑科学—结构工程] TU311.3