某大型火电厂带支撑框剪主厂房弹塑性分析

Elastoplastic analysis of main power house building frame-wallstructure with braces of thermal power plant

某大型扩建火电厂(2×1 000 MW)的抗震设防烈度为7度(0.15g),地震分组为一组,场地类别为Ⅲ类.为兼顾结构抗震和工艺布置需求,主厂房采用带钢支撑的混凝土框剪结构体系,纵横向钢支撑设置于汽机房,纵横向剪力墙设置于除氧煤仓间.采用YJK和PKPM软件对主厂房结构进行静力Pushover分析及动力弹塑性时程分析,得到结构在中震、大震下的抗震性能,并对结构进行性能化评价.计算结果表明主厂房达到了抗规性能目标4的要求.

The earthquake intensity of a certain thermal power plant(2×1 000MW)is 7(0.15g);and design earthquake group is the first class;and site classification isⅢ.In order to meet the seismic requirements of structural and technological process layout,the main power house building adopts framewall structure with braces.The steel braces are arranged in turbine hall in two-way and shear walls are arranged in deaerator and coal bunker bay.The YJK and PKPM softwares are used to analyze the structure of the main power house building by static Pushover analysis and dynamic elastoplastic time history analysis.The seismic performances of the structure under medium earthquake and large earthquake are obtained.The results show that the main power house building meets the requirements of aseismic performance level 4.