钢结构加层混凝土框架结构Pushover分析侧向力分布研究
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摘要
针对钢结构加层混凝土框架结构,考虑地震作用下其层间刚度变化的影响,提出了一种计算侧向力分布的方法——层间刚度侧向力分布法。通过对一钢结构加层混凝土框架结构进行推覆分析,得到各楼层侧移、层间位移角和塑性铰分布情况,并与时程分析结果进行了比较分析。结果表明,文中方法推覆分析得到的楼层侧移和层间位移角与时程分析结果吻合较好,塑性铰分布情况也较一致,并且本方法得到的推覆曲线是推覆计算结果的下限,用于结构的抗震评估更安全。
Considering the inter-story stiffness changes caused by the earthquake load,a calculated method of the lateral load distribution for RC frame structures with steel adding storey is presented.Through pushover analysis and nonlinear time-history(NTH) analysis,the method is validated by comparing response quantities such as story displacement,inter-story drift ratio,and distribution of plastic hinges.It is shown that the distribution of plastic hinges obtained from pushover analysis is accorded with that of NTH analysis under practical earthquake load;story displacement and inter-story drift ratio are also in accord with the result of NTH analysis.
Considering the inter-story stiffness changes caused by the earthquake load,a calculated method of the lateral load distribution for RC frame structures with steel adding storey is presented.Through pushover analysis and nonlinear time-history(NTH) analysis,the method is validated by comparing response quantities such as story displacement,inter-story drift ratio,and distribution of plastic hinges.It is shown that the distribution of plastic hinges obtained from pushover analysis is accorded with that of NTH analysis under practical earthquake load;story displacement and inter-story drift ratio are also in accord with the result of NTH analysis.
引文
[1]GB50010-2001,建筑抗震设计规范[S].GB50010-2001,Code for Seismic Design of Buildings[S].
[2]Gupta B,Kunnath S K.Adaptive spectra-based pushover procedure for seismic evaluation of structures[J].Earthquake Spectra,2000,16(2):367-392.
[3]Chopra A K,Goel R K.Amodal pushover analysis procedure for estimating seismic demands for buildings[J].Earthquake Engineering and Struc-tural Dynamics,2002,31(3):561-582.
[4]Kalkan E,Kunnath SK.Lateral load distribution in nonlinear static procedures for seismic design[C]//Nashville,Tennessee:Proceedings of the2004 Structures Congress,2004:22-26.
[5]叶燎原,潘文.结构静力弹塑性分析(push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-51.Ye Liaoyuan,Pan Wen.The principle of nonlinear static analysis(push-over)and numerical examples[J].Journal of Building Structures,2000,21(1):37-51.
[6]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89-97.Hou Shuang,Ou Jinping.Astudy of load pattern selection of pushover analysis and influence of higher modes[J].Journal of Earthquake Engineer-ing and Engineering Vibration,2004,24(3):89-97.
[7]门进杰,史庆轩,周琦.平面不规则混凝土框架结构非线性静力分析侧向力计算方法的研究[J].世界地震工程,2007,23(1):125-129.Men JinJie,Shi Qingxuan,Zhou Qi.Research on lateral load distribution method for asymmetric frame structures in nonlinear static analysis[J].World Earthquake Engineering,2007,23(1):125-129.
[8]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(Push-over)方法的改进[J].建筑结构学报,2000,21(1):44-51.Yang Pu,Li Yingmin,Wang Yayong,et al.Astudy on improvement of push-over analysis[J].Journal of Building Structures,2000,21(1):44-51.
[9]GB50009-2001,建筑结构荷载规范[S].GB50009-2001,Load Code for the Design of Building Structures[S].
[2]Gupta B,Kunnath S K.Adaptive spectra-based pushover procedure for seismic evaluation of structures[J].Earthquake Spectra,2000,16(2):367-392.
[3]Chopra A K,Goel R K.Amodal pushover analysis procedure for estimating seismic demands for buildings[J].Earthquake Engineering and Struc-tural Dynamics,2002,31(3):561-582.
[4]Kalkan E,Kunnath SK.Lateral load distribution in nonlinear static procedures for seismic design[C]//Nashville,Tennessee:Proceedings of the2004 Structures Congress,2004:22-26.
[5]叶燎原,潘文.结构静力弹塑性分析(push-over)的原理和计算实例[J].建筑结构学报,2000,21(1):37-51.Ye Liaoyuan,Pan Wen.The principle of nonlinear static analysis(push-over)and numerical examples[J].Journal of Building Structures,2000,21(1):37-51.
[6]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89-97.Hou Shuang,Ou Jinping.Astudy of load pattern selection of pushover analysis and influence of higher modes[J].Journal of Earthquake Engineer-ing and Engineering Vibration,2004,24(3):89-97.
[7]门进杰,史庆轩,周琦.平面不规则混凝土框架结构非线性静力分析侧向力计算方法的研究[J].世界地震工程,2007,23(1):125-129.Men JinJie,Shi Qingxuan,Zhou Qi.Research on lateral load distribution method for asymmetric frame structures in nonlinear static analysis[J].World Earthquake Engineering,2007,23(1):125-129.
[8]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(Push-over)方法的改进[J].建筑结构学报,2000,21(1):44-51.Yang Pu,Li Yingmin,Wang Yayong,et al.Astudy on improvement of push-over analysis[J].Journal of Building Structures,2000,21(1):44-51.
[9]GB50009-2001,建筑结构荷载规范[S].GB50009-2001,Load Code for the Design of Building Structures[S].
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