剪切型金属阻尼器在某高层项目中的应用

Application of shear-type metal damper in a high-rise project

为了减小建筑物沉降对附近地铁运行的影响,上海某高层建筑采用剪切型金属阻尼器来耗散地震能量,降低结构的地震作用,从而达到降低桩基内力和结构自重的目的。通过减震方案设计,对含有剪切型金属阻尼器的结构分别进行小震附加阻尼比计算,静力弹塑性分析和大震弹塑性分析。结果表明,小震作用下金属阻尼器进入耗能状态,可为结构提供一定附加阻尼比。结构在大震作用下未出现倒塌,满足抗震设计延性思路,结构表现出良好的抗震性能。金属阻尼器可显著降低地震响应,减震效果达到了设计预期目标。

In order to reduce the influence of building settlement on the operation of nearby metro,shear-type metal dampers was adopted in a high-rise building in Shanghai to dissipate seismic energy and reduce the seismic action of the structure,so as to reduce the internal force of pile foundation and the self-weight of the structure.Through the design of shock absorption scheme,the additional damping ratio under small earthquake was calculated,static elastic-plastic analysis and large earthquakes elastic-plastic were analyzed.The results show that the metal damper enters the state of energy dissipation under small earthquake,which can provide a certain additional damping ratio for the structure.The structure did not collapse under rare earthquake,which satisfies the ductility idea of seismic design and shows good seismic performance.Metal dampers can significantly reduce the seismic response,and the effect of shock absorption achieves the desired design goals.