高层框架结构转动惯性对其地震响应的影响
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摘要
针对考虑轴向力效应的弯剪型高层框架结构的弹塑性地震响应问题,研究转动惯性对高层框架结构层间剪力以及楼层屈服程度的影响。该文给出了考虑转动惯性的高层框架结构弹塑性分析的数值计算方法。对比了考虑和不考虑转动惯性时框架结构各层间剪力的最大值。针对不同塑性刚度系数情况,研究了考虑和不考虑转动惯性对楼层屈服的影响。通过是否考虑刚度系数中的轴向力,研究轴向力对结构层间剪力的影响。分析了竖向地震的作用力及楼层柱子的拉压状态。数值计算结果表明:转动惯性可造成高层框架结构底部楼层的层间剪力增大;竖向地震作用和结构自重对结构由水平地震作用产生的层间剪力影响很小;高层框架结构在强竖向地震作用下,其顶部附近楼层的柱子可出现受拉状态。
The paper aims at investigating the effects of the rotary inertia in the elastoplastic seismic response and the spatial distributions of a yield storey for a high-rise framed structure.The shear-bending lollipop model with an axial force is used in this paper.A numerical method is presented for the elastoplastic analysis of the high-rise framed structure with the rotary inertia being considered.The maximum values of the inter-storey shear force obtained from considering the rotary inertia are compared with those without considering the rotary inertia of the structure.The spatial distributions of the yield storey are discussed for different plastic stiffness coefficients when the structure is subjected to horizontal and vertical seismic loads.The influences of the vertical force on the inter-storey shear force are studied.The vertical seismic load and the forces of the columns are analyzed.The numerical results demonstrate that the inter-storey shear force at the bottom of the high-rise framed structure increases when the rotary inertia is considered.The vertical seismic load and the structural dead load possess a little influence on the inter-storey shear force caused by horizontal seismic loading.The columns at the top part of the high-rise frame structure may be in the state of tension when the structure is subjected to a severe vertical seismic load.
The paper aims at investigating the effects of the rotary inertia in the elastoplastic seismic response and the spatial distributions of a yield storey for a high-rise framed structure.The shear-bending lollipop model with an axial force is used in this paper.A numerical method is presented for the elastoplastic analysis of the high-rise framed structure with the rotary inertia being considered.The maximum values of the inter-storey shear force obtained from considering the rotary inertia are compared with those without considering the rotary inertia of the structure.The spatial distributions of the yield storey are discussed for different plastic stiffness coefficients when the structure is subjected to horizontal and vertical seismic loads.The influences of the vertical force on the inter-storey shear force are studied.The vertical seismic load and the forces of the columns are analyzed.The numerical results demonstrate that the inter-storey shear force at the bottom of the high-rise framed structure increases when the rotary inertia is considered.The vertical seismic load and the structural dead load possess a little influence on the inter-storey shear force caused by horizontal seismic loading.The columns at the top part of the high-rise frame structure may be in the state of tension when the structure is subjected to a severe vertical seismic load.
引文
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[3]Chung Yu-Lin,Nagae Takuya,Hitaka Toko,Nakashima Masayoshi.Seismic resistance capacity of high-rise buildings subjected to long-period ground motions:E-Defense shaking table test[J].Journal of Structural Engineering,2010,136(6):637―644.
[4]刘伟庆,王贵华,戴雅萍.带箱形转换层高层建筑结构的抗震性能研究[J].南京工业大学学报(自然科学版),2009,31(3):1―10.Liu Weiqing,Wang Guihua,Dai Yaping.Study on a seismic performances of high-rise building structures with box transfer storey[J].Journal of Nanjing University of Technology(Natural Science Edition),2009,31(3):1―10.(in Chinese)
[5]聂建国,秦凯,肖岩.方钢管混凝土框架结构的Push-over分析[J].工业建筑,2005,35(3):68―70.Nie Jianguo,Qin Kai,Xiao Yan.Push-over analysis on the seismic behavior of a concrete-filled rectangular tubular frame structure[J].Industrial Construction,2005,35(3):68―70.(in Chinese)
[6]吴晓涵,骆剑峰,马莉.竖向地震作用下混凝土框架结构抗震性能研究[J].结构工程师,2006,22(6):37―43.Wu Xiaohan,Luo Jianfeng,Ma Li.Research on earthquake resistance behavior of R/C frame structures subjected to vertical motion[J].Structural Engineer,2006,22(6):37―43.(in Chinese)
[7]滕军,李柞华,马伯涛,董志君.大震作用下高层结构损伤评估及耗能减震方法研究[J].深圳土木与建筑,2008,5(3):21―27.Teng Jun,Li Zuohua,Ma Botao,Dong Zhijun.Research on damage assessment and passive energy dissipation method of high-rise structures under large earthquakes[J].Shenzhen Architecture Civil Engineering,2008,5(3):21―27.(in Chinese)
[8]刘铁林,姜迎春,刘伟.地震作用下高层结构动力响应分析的一种数值方法[J].工程力学,2008,25(增刊Ⅰ):175―178.Liu Tielin,Jiang Yingchun,Liu Wei.A numerical method for dynamic response analysis of high-rise structures under seismic load[J].Engineering Mechanics,2008,25(Sup.Ⅰ):175―178.(in Chinese)
[9]刘铁林,姜迎春,刘洪飞.地震作用下高耸结构动力响应波动分析方法[J].工程力学,2008,25(增刊II):164―167.Liu Tielin,Jiang Yingchun,Liu Hongfei.Dynamic response analyses by wave approach for high-rise structure under seismic loading[J].Engineering Mechanics,2008,25(Sup.II):164―167.(in Chinese)
[10]鲁斯C T F.结构力学的有限元法[M].吴德心,译.北京:人民交通出版社,1991.Ross C T F.Finite element methods in structural mechanics[M].Translated by Wu Dexin.Beijing:China Communications Press,1991.(in Chinese)
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