某配电楼基础隔震设计与分析

Design and Analysis on Base Isolated Structure of a Power Distribution Building

目前,对建筑物水平隔震计算分析大多采用简化的力学模型和假定条件,不能够反映出非对称结构空间的受力状态,对上部结构各构件所承受的内力也不易确定,给结构构件设计者带来不便。文中以某配电楼工程为例,采用有限元软件ANSYS对其在隔震与不隔震两种情况下的地震反应进行了分析,还将计算结果与传统剪切型模型的计算结果进行了对比。结果表明,ANSYS软件进行地震反应分析能够较确切的反映建筑物在地震作用下的三维反应,便于全面地分析各个构件、各个节点的地震反应。采用隔震技术可显著降低上部结构的地震反应,对于不对称结构采用三维时程分析能更精确地反映结构的地震响应。

At present,the simple mechanical model and assumed conditions are often used for the calculation and analysis of isolated structures of buildings,which could not reflect and define the stressing and inner force of the structures.The seismic response of the isolated and non-isolated power distribution building under quake is investigated and analyzed here with the FEM software ANSYS,and the calculated results are compared with those obtained by using the traditional shear model.The results indicate that the seismic response from the upper structure of the base-isolated building is greatly reduced,and more accurate results can be obtained by 3D time history analysis for unsymmetrical structures.