火电厂预应力框架拟静力试验与推覆分析

Pseudo-static Test and Push-Over Analyses of Prestressed Concrete Frame in a Thermal Power Plant

火电厂作为重点抗震设防建筑,理应具有较强的抗震性能,而现行"两阶段"结构设计方法无法提供结构在地震作用下的整体反应。本文采用静力弹塑性分析方法,利用SAP软件,结合我国现行抗震设计规范,分析了火电厂预应力框架在地震作用下的结构反映特性,并通过与拟静力试验结果的对比,提出设计建议。分析表明该结构具有明显的薄弱环节,在设计中应予以重视。

As the key aseismic building,thermal power plant demands highly seismic performance.The ＂two-stage design＂ method used in structure designing can＇t give out the massive reaction of the whole buliding.The reaction under earthquake of prestressed concrete frame in thermal power plant is analyzed by SAP2000,based on Push-over Method,combined with the code for seismic design.Compared with the results of pseudo-static test,some suggestions are proposed.The analysis proves that this kind of structure meets the needs of requirement for 7 degrees earthquake resistance protection.The bottom frame column with the weakest part must be pay attention during the structure design.