【摘要】 阻尼比是反映结构耗能能力的参数,对结构的振动反应有着重要影响。目前结构设计阶段通常取阻尼比为常数,这不能真实反映建筑物的阻尼机理,与阻尼比的实测结果也有很大的差距。本文基于复阻尼理论,采用能量法推导了增层房屋任意振型阻尼比的计算公式,提出了地震反应谱的修正方法,并利用Matlab工具语言编制程序对此方法进行实现。最后,通过对一个数值算例结果的分析,验证了本文方法的可行性和实用性。更多还原

【Abstract】 Damping ratio,as a parameter that reflects capacity of dissipating energy of building and has significant influence on the dynamic responses,is regard as a constant when designing buildings at present.It is not consistent with damping mechanism and full-scale data of damping ratio of buildings.Based on the complex damping theory and the energy method,the calculation formula of the damping ratio for different vibration mode is given,and the revising method of the seismic response spectrum of the building added storey is presented.The method of this paper is feasible and practical according to the analysis of the numerical example.更多还原