含重型储仓的工业厂房结构抗震设计方法研究

Seismic Design of Industrial Building Structures with Heavy Storage Equipment

以美国ASCE/SEI 7-16与中国《建筑抗震设计规范》为例,梳理并对比了中美规范对含重型储仓工业厂房的抗震设计方法。同时,以一实际火电厂主厂房工程为例,基于厂房内煤斗设备特征与中美规范的相关要求,建立了煤斗与主厂房结构的整体模型。通过时程动力分析,将整体建模法与工程实际中常使用的另一种抗震分析方法——直接荷载法的设计结果进行了对比分析。结果表明,直接荷载法用于含重型储仓工业厂房结构的抗震设计时,与整体建模法存在较大误差。本文基于储仓设备动力特性与传力等效的思路,提出了等效简化模拟方法,计算结果表明,该简化方法在弹性范围内的地震响应接近整体建模法的设计结果。

This paper summarized and compared the seismic design methods of industrial building structures with heavy silos as prescribed in American and Chinese design codes.Response history analyses were performed on an actual thermal power plant structural model using integral modeling method and direct loading method where the former is specified in modern design codes and the latter is widely adopted in engineering practice.The obtained response results were compared then.The results showed that the direct loading method was not adequate for seismic analysis of industrial plant structures with heavy silos.Finally,based on the dynamic characteristics of the silo-shape equipment and the concept of equivalent force-resisting mechanism,a simplified simulation method was developed.The results showed that the elastic seismic response derived from the proposed simplified method was close to that of integral modeling method.