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目前我国已建造的世界上首台1000MW直接空冷机组,结构地处高烈度区。为保证该工程所采用的新型结构体系“钢筋混凝土管柱+钢桁架+钢斜撑”的安全,进行了结构模态计算和位移响应、内力计算等静力弹性分析,并将计算结果与传统结构体系进行对比。同时还对该新型结构体系从7度小震到9度大震作用下的抗震性能进行了振动台试验。计算结果及试验研究表明,该新型结构体系相对传统结构体系整体刚度提高,抗震性能更好、可靠度更高,更适合高烈度区,并能够保证小震不坏和大震不倒的设防要求。
At present, China has built the world’s first 1000MW direct air-cooled unit, located in a high intensity zone. In order to ensure the safety of the new structural system adopted in the project, such as “reinforced concrete column + steel truss + steel bracing”, the structural modal calculation and displacement response, internal force calculation and other static elastic analysis were carried out. The calculation results Contrast with the traditional structure system. At the same time, the shaking table test was carried out on the seismic performance of the new structural system under the action of a severe earthquake of 7 degrees to 9 degrees. The results of calculation and experimental studies show that the new structural system has higher stiffness, better seismic performance and higher reliability than the traditional structural system, and is more suitable for high intensity zone and can guarantee the construction requirements of small earthquake and large earthquake .