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楼面反应谱一般是指楼层质点加速度反应谱,它是对设置在楼面上的设备和管道进行抗震分析的地震输入。为了解决计算楼面反应谱的实用问题,本文提出一种由地面反应谱直接估计楼面反应谱的方法。该方法以建筑结构抗震验算的基底剪力法及相应的放大曲线为基础,具有简单实用的特点。文中最后给出与时程分析途径估计楼面反应谱方法比较的算例,结果表明,对于基底剪力法适用范围内的结构,由简化方法确定的楼面反应谱是可以满足工程要求的。
The floor response spectrum generally refers to the floor particle acceleration response spectrum, which is the seismic input for seismic analysis of equipment and pipelines installed on the floor. In order to solve the practical problem of calculating floor response spectrum, this paper proposes a method of directly estimating floor response spectrum from ground response spectrum. The method is based on the base shearing method of building structure seismic checking and the corresponding amplification curve, and has simple and practical features. Finally, an example of comparison of floor response spectrum method with the time history analysis method is given. The results show that the floor response spectrum determined by the simplified method can meet the engineering requirements for the structure within the applicable range of the base shear method.