砖混轻钢加层结构的非线形时程分析

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。

Nonlinear Time-history Analysis of Energy Dissipation Braced Light Gauge Steel Structure Applied in Storey-adding

The superiority of light gauge steel structure applied in storey-adding makes it be applied more and more extensively, however, because of whipcord effect, displacement about the storey-adding of the light gauge steel structure can not satisfy designing requirement. It is an economical and effective anti-seismic measure that friction damper is applied in the light gauge steel structure. Taking the displacement under earthquake response as controlling goal, using general finite element analysis program-ANSYS, the paper adopts nonlinear time-history analysis to calculate inner force and displacement of friction damper energy dissipation braced light gauge steel structure. According to different damped ratios, calculating model has been established. Conclusions show that friction damper energy dissipation braced light gauge steel structure has consumed the most of seismic energies and alleviated harmful earthquake effect of main structure. Light gauge steel storey-adding structure can satisfy the expected goal.