扇形铅黏弹性阻尼器滞回性能试验研究  

Experimental investigation on hysteretic performance of sector lead viscoelastic damper

作　　者：吴从晓[1] 周云[1] 徐昕[1] 张超[1] 邓雪松[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《建筑结构学报》2014年第4期199-207,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(51208128);广东省教育部产学研结合项目(2009B090300351);广州市高校"羊城学者"首席科学家科研项目(10A026S)

摘　　要：试验设计并制作了2组4个几何尺寸及构造相同但橡胶剪切模量不同的扇形铅黏弹性阻尼器,对其进行低周反复荷载作用下的滞回性能试验。研究阻尼器的滞回性能、骨架曲线与恢复力模型、疲劳性能及大变形能力,分析不同应变幅值、不同加载频率、不同橡胶剪切模量对其性能的影响,并通过有限元软件对阻尼器进行有限元分析,对比有限元分析结果和试验结果。研究结果表明:该阻尼器滞回曲线饱满、耗能能力较强,具有良好的抗疲劳性能和大变形能力;阻尼器的橡胶材料剪切模量和试验加载幅值对其性能参数有一定的影响;试验加载频率对其性能参数影响较小;阻尼器恢复力模型可采用双线性模型来描述;试验和有限元分析结果吻合较好,验证了该阻尼器有限元模拟分析方法的合理性。Four sector lead viscoelastic damper （SLVD） specimens were prepared in two categories, which were of the same sizes but different rubber shear modulus. The tests were conducted under low frequency cyclic load to study the performances of SLVD specimens, such as hysteretic behavior, skeleton curve, restoring force model, fatigue properties, and deformation capacity, etc. Whilst the influences from different strain amplitudes, loading frequency and rubber shear modulus on specimen performances were further analyzed. The finite element analysis of SLVD was carried out to do comparative research on numerical and experimental results. It is concluded that SLVD exhibits full hysteresis curve, excellent energy dissipation capacity, favorable fatigue performance, and large deformation capacity in the test; the strain amplitude and rubber shear modulus have more impact on performance of SLVD while the test loading frequency does not; the symmetric bilinear model can be used to describe the restoring force model of SLVD; the finite element analysis of SLVD is demonstrated to be effective and reliable in that the numerical results are basically consistent with the experimental results.

关 键 词：扇形铅黏弹性阻尼器 拟静力试验 有限元分析 滞回性能 疲劳性能 

分 类 号：TU352.12[建筑科学—结构工程] TU317.2