摘要
传统空冷支架结构一般采用钢桁架-钢筋混凝土管柱的竖向混合布置方式,质量和刚度沿竖向分布极不均匀,造成结构扭转效应明显。针对一种新型伞撑空冷支架结构体系,进行基本动力特性和平扭耦联地震动反应计算,研究结构的周期、振型及在多维地震作用下的动力响应,通过与传统结构进行对比,分析了引起变化的原因,提出了对结构的设计建议。研究结果表明,该新型体系能有效减轻结构的扭转效应,减小结构的侧向位移,增强结构的整体抗震能力。
The mass and rigidity distributions of traditional support structure of air-cooled condenser, adopting hybrid structure system of steel truss and reinforced concrete pipe column,are badly non-uniform at the vertical direction, which may cause obvious structural torsion. In order to improve the stability of the support structure of air-cooling system, a support structure with diagonal braces is proposed and studied in this paper. The vibration period, vibration type and dynamic responses under multidimensional ground motions of the new support structure are studied in this paper through analyses of the dynamic characteristics and lateral-torsion coupled seismic response of the structure. The reasons for the changes in the mechanical performances are studied through comparison between the two kinds of support structures, and the recommendations on the designing of structure are also proposed. The results show that this new-type structure can reduce the structural torsion, lateral displacement, and strengthen the overall seismic capacity of the system.
作者
吴健
曾良诚
白国良
代慧娟
刘超
傅少君
WU Jian;ZENG Liangcheng;BAI Guoliang;DAI Huijuan;LIU Chao;FU Shaojun(Shaanxi Key Laboratory of Safety and Durability of Concrete vStructures,Xijing University,Xi'an 710123,China;C'ollcge of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,C'hina;College of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;College of Science,Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2020年第1期38-42,共5页
Engineering Journal of Wuhan University
基金
陕西省教育厅专项科研计划项目(编号:18JK1198)
西京学院特殊人才科研启动专项基金(编号:XJ17T08)
西安建筑科技大学结构工程与抗震教育部重点实验室开放基金(编号:KLSEER-201901).
关键词
伞撑空冷支架结构
传统支架结构
抗扭性能
地震扭转分量
对比分析
support structural system with diagonal brace of air-cooled condenser
traditional support structural system
torsion resistance performance
torsional acceleration component
comparison
