【摘要】 针对高烈度区大容量火电厂主厂房不适于应用钢筋混凝土框排架结构和钢支撑钢排架结构的情况,提出了采用新型型钢混凝土框排架混合结构体系。以1000MW机组电厂主厂房为原型,按1/7进行缩尺的3跨3榀框排架子结构进行空间模型的拟动力试验,研究了在水平地震作用下模型结构的裂缝发展规律及破坏机制、结构的滞回特性及变形性能、框排架结构协同工作性能等。研究结果表明:在地震加速度0.1g地震波作用下结构满足"小震不坏"的要求,在0.4g时满足"大震不倒"的要求;结构弹塑性层间位移角限值为1/95;排架结构的设计剪力应不小于整体结构7%的基底总剪力等。更多还原

【Abstract】 A new type of section steel concrete frame-bent hybrid structure is applied to a large capacity power plant in high intensity seismic region for replacing RC frame-bent structure and steel-bracing-steel-bent structure.The pseudo-dynamic test of a 1/7 scale model with two spans and three bays has been performed based on the prototype structure of main building in 1000MW power plant.The studied contents include developing law of crack,damage mechanism,hysteretic characteristic,deformation property and coordinated working performance of the structure under horizontal earthquakes.Experimental results show that the structure does not crack under 0.1g earthquake acceleration,and does not collapse under 0.4g acceleration ground motion input;the most elastic-plastic story drift angle is 1/95;the design shear of the bent structure should not be less than 7% of the total base shear.更多还原