针对我国高烈度区大容量机组火力发电厂钢筋混凝土框排架主厂房“先天不足”以及钢结构主厂房造价高的现状,现提出采用型钢混凝土(SRC)框架柱—钢筋混凝土(RC)分散剪力墙混合结构体系作为主厂房框排架新型结构体系。根据该结构体系特点,选取三榀三跨结构进行1∶7比例空间模型抗震性能拟动力和拟静力试验,研究该新型结构体系在水平地震作用下的受力特点,刚度退化规律、结构滞回性能、变形性能和薄弱部位等。研究结果表明,该新型框排架结构体系能够满足“小震不坏、大震不倒”的设防要求,结构的位移-荷载滞回曲线较饱满,结构的耗能能力和变形性能较强,薄弱部位发生在汽轮发电机运转平台层处,实际设计中应加强注意。该混合结构体系能够满足8度地区大容量机组主厂房结构的抗震要求,是一种值得大力推广应用的新型结构体系。
Considering the characteristics of a hybrid structure composed of SRC frame columns-RC disperse shear walls, a 1:7 scale model of three spans and three frames is set up to conduct pseudo-dynamic test and pseudo-static test. The results indicate that the hybrid structure can satisfy the fortification requirements of ' no damage in small earthquake, no collapse in strong earthquake' , and the displacement-load curve is plump with good energy dissipation capacity and deformation performance, with the turbine-generator operation platform in the weak floor. Overall, the hybrid structure would satisfy intensity-8 seismic fortification requirements for main buildings of large thermal power plants.