高烈度区1000MW直接空冷机组空冷凝汽器支架及排汽管道支撑结构体系研究
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摘要
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。
The first 1000MW power plant used air-cooling technique in the world has been built in the highly seismic intensity zone in China.In order to assure the safety of new structural system adopted reinforced concrete pipe column,steel truss and steel brace system,the static elastic analysis including modal calculation,displacement response and internal force calculation is carried out and the calculating results are compared with these of traditional structural system.Meanwhile the shaking table test is implemented to study seismic performance of this new structure from 7 to 9 degrees of earthquake intensity.The research results indicate that integral rigidity and seismic performance of the new structural system is better than that of traditional structures,and it is more suitable for highly seismic region and could satisfy seismic fortification requirements of no damage under minor earthquake and no collapsing under strong earthquake.
The first 1000MW power plant used air-cooling technique in the world has been built in the highly seismic intensity zone in China.In order to assure the safety of new structural system adopted reinforced concrete pipe column,steel truss and steel brace system,the static elastic analysis including modal calculation,displacement response and internal force calculation is carried out and the calculating results are compared with these of traditional structural system.Meanwhile the shaking table test is implemented to study seismic performance of this new structure from 7 to 9 degrees of earthquake intensity.The research results indicate that integral rigidity and seismic performance of the new structural system is better than that of traditional structures,and it is more suitable for highly seismic region and could satisfy seismic fortification requirements of no damage under minor earthquake and no collapsing under strong earthquake.
引文
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[5]GB50011-2010.建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
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