大型火电厂主厂房框排架结构静力弹塑性地震反应分析

Elastoplastic Static Earthquake Response Analysis of Frame-bent Structures of Large Thermal Power Plant Main Buildings

钢筋混凝土框排架结构是我国火电厂主厂房最常用的结构型式之一,由于工艺布置要求,主厂房质量、刚度分布不均匀,结构抗震性能的研究尤为必要。文章运用基于结构性能的抗震设计方法,对大型火电厂框排架结构进行静力弹塑性地震反应分析,研究该类结构的整体抗震能力和破坏过程。结果表明,主厂房框排架结构在7度罕遇地震作用下能满足变形要求,但结构存在较多的薄弱环节,在设计时应引起高度重视。

Seismic performance study of reinforced concrete frame-bent structures, which is one of the most commonly used power plant main building structure types, is especially important because of process layout requirements, and non-uniformly distributed structural weight and stiffness. By using structural property-based seismic design, elastoplastic static responses of large power plant main building frame-bent structures are performed to study the overall seismic performance and failure process of such type of structure. Calculations show that the frame-bent structure satisfies deformation requirement even under rare earthquake as high as 7 degree intensity. However, there are quite a few weak points in the structure that require a high degree of attention in design process.