中文摘要：

对于高烈度区1000MW机组火电厂，传统钢-混凝土混合结构空冷支架已经不能满足使用要求。在地震作用下，结构的悬挑端位移超限、局部杆件受力过大、结构整体侧移较大。对此，提出了加设斜撑的空冷钢-混凝土混合结构体系，并按1／8缩尺比例进行了该类结构的拟动力试验和拟静力试验。根据试验结果研究了模型结构在EL-CenVo（N-S）地震波作用下的滞回性能、延性性能、刚度退化和耗能能力。试验结果表明：与传统钢-混凝土混合结构空冷支架相比，加设斜撑后，结构的耗能能力有较大的提高，刚度退化速度减慢，而且残余刚度较大，具有了更大的安全储备。研究为同类结构的抗震设计提供了试验依据，并能指导相关工程设计。

英文摘要：

The traditional steel-concrete hybrid air-cooling structure can hardly satisfy the requirements of the 1000 MW thermal power plants in high seismic regions. The displacement of the cantilever end of the structure is beyond the limit value, local force is too large, and the overall lateral displacement is also big under a seismic action. Thus, a steel-concrete hybrid air-cooling structure with steel braces was proposed. Pseudo-dynamic and pseudo-static tests were conducted for a 1/8 scaled model structure. Its hysteretic behavior, ductility, stiffness degradation and energy dissipation capacity were studied when the model structure was under EL-Centro （N-S） horizontal earthquake motion. The test results show that the structure with steel braces will have better energy dissipation capability, slower stiffness degradation speed, bigger residual stiffness and more safety stock, compared with the traditional steel-concrete hybrid structure. The research results can provide an experimental basis for the aseismic design of similar structures, and a guide for relevant engineering design.