SMA阻尼器对大跨斜拉桥地震响应影响研究  

Research on Influence of SMA Dampers on Seismic Response of Long-span Cable-stayed Bridge

作　　者：焦常科[1,2] 李爱群[2,3] 伍小平 

机构地区：[1]上海建工集团工程研究总院,上海201114 [2]东南大学土木工程学院,江苏南京210096 [3]北京建筑大学,北京100044

出　　处：《铁道学报》2017年第5期112-117,共6页Journal of the China Railway Society

基　　金：国家自然科学基金项目(51408355)

摘　　要：SMA(Shape Memory Alloy)材料因独特性而广泛用于工程结构减震控制装置中。为便于工程结构分析,编制SMA阻尼器简化双旗型本构Fortran子程序并嵌入Abaqus平台的动力分析中,并以低周往复加载算例验证了其正确性;以一座大跨斜拉桥为例,基于Abaqus平台建立其脊骨梁有限元模型,研究SMA阻尼器的减震控制效果。研究表明:对于塔梁纵桥向漂浮的大跨斜拉桥,塔梁处纵桥向布置SMA阻尼器可有效减小其纵桥向地震位移响应,并且SMA阻尼器的初始刚度对减震效果的影响较为明显;塔梁处纵桥向布置SMA阻尼器后,结构内力减震效果对输入地震波及SMA参数具有一定的依赖性,应当引起注意。Shape Memory Alloy（SMA） material has been widely used in vibration control devices of civil engineering structures, for its unique characteristics. Firstly, the double-flag simplified model for the SMA device was programmed in Fortran language and embedded in the finite element software Abaqus, with calibration by a simplified model under low-cycle displacement loading, to facilitate the analysis of engineering structures. Secondly, with a long-span cable-stayed bridge as an example, a spine girder finite element model was built to analyze the effect of SMA devices on the seismic response in details. Results showed that the seismic response of displacement in longitude direction can be reduced by SMA devices significantly, placed between tower and girder for long-span cable-stayed bridge with floating girder. The initial stiffness of SMA devices had important effect on the seismic reduction. The seismic reduction of internal forces of structures may depend on the ground motions and the parameters of SMA devices, which should receive much attention.

关 键 词：SMA阻尼器 大跨斜拉桥 地震响应 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]