大型火电厂钢结构主厂房弹塑性地震反应分析

Elastic earthquake response analysis of steel frame-bent structures of large thermal power plant main buildings

为了研究大型火电厂钢框排架主厂房的变形能力、薄弱部位、受力机理及其破坏机制,采用弹塑性时程分析方法对其抗震性能进行了研究。计算结果表明:主厂房横向框排架和纵向框架-支撑结构存在较多的薄弱部位,计算分析应采用考虑扭转效应的空间模型。

The dynamic elastic-plastic analysis method is used to study the deformation, weak parts, loading capacity and failure mechanisms of steel frame-bent structures of large thermal power plant main buildings. The results show that there are much weak parts in the horizontal frame-bent and longitudinal frame-supporting structures ,which must be strengthened when designed. The space model should be used to consider the effect of torsion in structural calculation and analysis.