粘滞阻尼器对空间结构的振动控制效应  

Vibration Control Effect of Viscous Damper on Space Structure

作　　者：贾斌[1,2] 罗晓群[1,2] 张其林[2] 丁娟[2,3] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055 [2]同济大学土木工程学院,上海200092 [3]精工建筑设计研究总院,上海200233

出　　处：《地震工程学报》2014年第1期39-46,共8页China Earthquake Engineering Journal

基　　金：西安建筑科技大学结构工程与抗震教育部重点实验室开放基金项目(KL-SEER-ME-201202)

摘　　要：采用三向地震波输入对西北高烈度地震带某体育馆进行非线性时程分析,研究粘滞阻尼器对大跨空间结构抗震加固的机理和效果。以节点水平向位移、构件内力作为屋盖振动控制目标,楼层位移及剪力作为下部结构振动控制目标。时程分析表明:不同地震波作用时上部屋盖减震控制效果均较好;但下部结构减震控制对地震波频谱特性较为敏感;设置粘滞阻尼器对不同地震烈度下整体结构的动力响应均能起到有效控制作用;屋盖结构上均匀布置阻尼器比集中布置减震效果好;空间结构振型复杂,减震分析须考虑上下部结构的耦合作用。研究成果可为大跨空间结构采用粘滞阻尼器减振控制提供参考。Supplemental damping is becoming an increasingly tested and reliable seismic design strategy, which has resulted in the evolution of building guidelines to include supplemental damped structures. The usage of supplemental viscous dampers to dissipate energy and reduce building response to dynamic inputs is gaining worldwide acceptance. The concept of supplemen- tal dampers added to a structure is such that the dampers,rather than the structure itself,absorb much of the energy input to the structure from a transient. The placement of dampers is a critical design concern because the distribution of damping may significantly affect a building＇s dynamic response and the necessary damping cost. However, current building codes and guidelines have not yet prescribed a particular method for optimal placement of dampers. Although the 2003 National Earthquake Hazards Reduction Program （NEHRP） provisions offers a methodology for determi- ning the total damping value corresponding to a desired effective damping ratio, it does not ad- dress the optimal distribution of the dampers. This paper presents an application of viscous damp- ers in a space structure to suppress anticipated earthquake action. The northwestern Chinese re- gion is an area affected by many earthquakes;therefore, seismic retrofitting of existing buildings presents many difficulties in this region. Any intervention in their structural system should nei-ther violate their forms nor create dramatic changes in their structural behaviors. To study the vi- bration control of large-span space structures with viscous dampers,dynamic time-history analyses were performed for a gymnasium building subjected to three-dimensional earthquake ground mo- tions. To evaluate the seismic performance of the space structures, three dimensional mathematical models were prepared by using FEA ANSYS software. The models incorporated geometric （P- A） ,material {member yielding）, and viscous dampers （axial force-axial displacement hysteresis） nonlinearity. Seismic mass

关 键 词：空间结构 体育馆 粘滞阻尼器 消能减震 多维地震输入 

分 类 号：TU393.3[建筑科学—结构工程] TU311.3