型钢混凝土框排架混合结构是一种新型的火电厂主厂房结构体系，合理的剪力墙布置能够使该类结构实现三道抗震防线。采用ABAQUS有限元软件进行8度小震、中震、大震以及9度大震下的弹塑性地震反应分析，获得结构在不同强度地震下的基底剪力、整体侧移、层间侧移角以及结构构件的损伤演化特性。研究结果表明：强震作用下剪力墙首先出现损伤破坏，可以起到第一道抗震防线的作用，有效提高了结构的抗震能力；随着地震作用的增强，结构薄弱部位由煤斗层到运转层再到底部两层下移，且整体侧移曲线由弯剪型向剪切型转变；整体结构的变形性能较好，能够满足“大震不倒”的抗震设防需求。最后，通过计算分析提出适用于不同烈度、不同场地类别下的剪力墙布置数量与抗震构造措施，可供工程设计参考。%SRC (shapes reinforced concrete)frame-bent hybrid structure is a new type of main building system for thermal power plants,and a reasonable arrangement of shear walls can make the structure have three anti-seismic lines. ABAQUS finite element software was used to analyze the elastic-plastic seismic response of the structure under 8 degree minor earthquake,moderate earthquake and major earthquake as well as 9 degree major earthquake,to acquire the base shear,lateral displacement,inter-story drift and damage evolutionary character of the structure under different earthquake intensities.The results showed that the shear wall is damaged firstly under strong earthquake,it forms the first anti-seismic line,and this can enhance the earthquake resistance of the structure effectively;as the earthquake intensity increases,the weak part of the structure moves down from coal hopper floor to operation floor and to bottom two stories, and the lateral displacement curve is shifting from shear-moment-type toward shear-type;the deformation performance of the whole structure is well,it can make the structure meet the requirement of no collapse under severe earthquake. Finally,the reasonable arrangement and seismic tectonic measure of shear walls under different earthquake intensities and different site categories were suggested through numerical analysis,they could be referencial to engineering designs.
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