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轻型钢结构加层的优越性使其应用前景越来越广泛,然而由于鞭鞘效应,轻型钢结构自身的层间位移不能满足设计要求。目前,应用摩擦阻尼器对轻钢加层结构进行减震是经济有效的抗震措施。文中以常遇地震下的位移为控制目标,运用ANSYS通用有限元程序,采用非线性时程分析方法对安装有摩擦耗能支撑的轻钢加层结构进行内力和位移的计算。并根据摩擦阻尼器阻尼比的不同取值,建立计算模型,经过计算表明:安装有摩擦耗能支撑的轻型钢结构本身消耗了大部分的地震能量,减轻了主体结构的震害;轻钢加层结构的层间位移可以满足预期目标。
The advantages of lightweight steel structure plus layer make it more and more widely used. However, due to the whiplash effect, the light steel structure itself can not meet the design requirements. At present, the application of friction dampers to shock-absorb light-weight steel structures is a cost-effective seismic measure. In this paper, displacement under constant earthquake is taken as the control target. By using ANSYS finite element program, nonlinear internal force and displacement of light-weight reinforced structure with frictional energy dissipation support are calculated by nonlinear time-history analysis. According to different values of the damping ratio of the friction damper, a calculation model is established. The calculation shows that the light steel structure with the friction energy dissipation support itself consumes most of the seismic energy and lightens the damage of the main structure; Layer structure of the interlayer displacement can meet the expected goals.