多遇地震作用下高层钢结构支撑形式设计分析
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摘要
支撑体系是钢框架结构的重要组成部分,尤其在高层结构中,支撑对提高侧向刚度作用显著。针对高层钢结构中普遍采用的几类支撑形式,分别对其进行多遇地震作用下的承载力极限状态和正常使用极限状态分析。采用的主要分析方法是有限元模型在天津波作用下的时程响应数值模拟,并对杆件应力、层间位移等重要控制变量进行对比分析。研究表明采用合适的支撑形式可有效地提高高层结构侧向刚度。在相同用钢量前提下,十字支撑和人字支撑的作用最为显著。
Bracing system plays an important role in steel frame structures,which could contributes to dramatically increase lateral stiffness of high-rise structures.In this paper,frequent seismic analysis for a high-rise steel frame structure with different bracing systems is carried out.A finite element model of a high-rise steel structure is built and time-history response of the model impacted by Tianjin seismic wave is analyzed.According to the comparison with respect of member stress and story-drift,it is obvious that the implementation of bracing system can improve lateral robustness efficiently.Numerical results reflect it is comparatively efficient and economic to design crossing bracing system and V-shaped bracing system in high-rise steel frame structures.
Bracing system plays an important role in steel frame structures,which could contributes to dramatically increase lateral stiffness of high-rise structures.In this paper,frequent seismic analysis for a high-rise steel frame structure with different bracing systems is carried out.A finite element model of a high-rise steel structure is built and time-history response of the model impacted by Tianjin seismic wave is analyzed.According to the comparison with respect of member stress and story-drift,it is obvious that the implementation of bracing system can improve lateral robustness efficiently.Numerical results reflect it is comparatively efficient and economic to design crossing bracing system and V-shaped bracing system in high-rise steel frame structures.
引文
【1】梁焕新,吴尚荣,景亭.高层钢结构跨层支撑——框架设计[J].四川建筑科学研究,2008(1):156-161.
【2】管克俭,王新武,彭少民.钢框架支撑体系的应用和分析方法[J].中国工程科学,2003(5):80-83.
【3】陈富生,邱国桦,范重.高层建筑钢结构设计[M].北京:中国建筑工业出版社,2000.
【4】Sarno L D.Elnashai A S.Bracing systems for seismic ??retrofitting of steel frames[J].Journal of Constructional Steel Research,Accepted,2008.
【5】JGJ 99-98高层民用建筑钢结构技术规程[S].
【6】GB 50009-2001建筑结构荷载规范[S].
【7】GB 50011-2001建筑抗震设计规范[S].
【8】GB 50017-2003钢结构设计规范[S].
【2】管克俭,王新武,彭少民.钢框架支撑体系的应用和分析方法[J].中国工程科学,2003(5):80-83.
【3】陈富生,邱国桦,范重.高层建筑钢结构设计[M].北京:中国建筑工业出版社,2000.
【4】Sarno L D.Elnashai A S.Bracing systems for seismic ??retrofitting of steel frames[J].Journal of Constructional Steel Research,Accepted,2008.
【5】JGJ 99-98高层民用建筑钢结构技术规程[S].
【6】GB 50009-2001建筑结构荷载规范[S].
【7】GB 50011-2001建筑抗震设计规范[S].
【8】GB 50017-2003钢结构设计规范[S].
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