摘要
本文提出一种编织式金属阻尼器,并通过数值模拟和试验研究相结合的方法展开系统的研究。本文首先进行了有限元模拟和拟静力试验,得到了该阻尼器的力-位移曲线,结果表明本阻尼器的疲劳性能好,但滞回曲线有一定的捏缩现象。然后运用ANSYS对其设计参数进行了优化,结果发现改用梭形截面杆后,阻尼器出力和滞回性能大幅提高。最后采用Bouc-Wen模型建立了阻尼器的恢复力模型,运用SAP2000软件对安装此阻尼器前后10层平面框架进行弹塑性时程分析,结果表明,安装该阻尼器后结构的层间位移、层剪力和顶点位移大幅降低,从而验证了其耗能性能。
A novel woven metal damper is presented in the paper. Its vibration-mitigating performance is studied through numerical and experimental analysis. First, hysteretic curves of numerical simulations and experiments are obtained, showing that this damper has excellent fatigue performance but slight kneaded shrinkage phenomenon. To improve its dissipation performance, parameter optimization is carried out through numerical simulations. It is observed that dampers with fusiform steel rods introduce higher energy dissipation capacity. Finally, restoring force model is established by employing Boue-Wen model. Using this model, elastic-plastic time-history analyses of a ten-story planar frame structure with the proposed dampers are done by using program SAP2000. Comparing the inter-story displacement, shear force and roof displacement before and after using the dampers shows that the proposed damper exhibits high vibration-mitigating capacity.
出处
《地震工程与工程振动》
CSCD
北大核心
2015年第5期41-46,共6页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51408080)
教育部博士点基金项目(20120191120050)
