基础偏心时土-非对称结构相互作用体系参数分析
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摘要
为分析基础偏心对非对称结构平扭耦联的影响,建立了考虑基础偏心的地基土-非对称结构相互作用运动方程。利用强解耦方法解耦后,编制MATLAB程序。分别详细分析了基础质量偏心率和刚度偏心率对上部结构地震反应的影响程度。得出基础质量偏心率对上部结构的影响很小,而基础刚度偏心率对上部结构的影响相对明显,尤其是对结构扭转反应的影响。通过对基础刚度偏心率为?0.6与0.6两种情况进行时程分析,验证了参数分析所得到的规律。
In order to study the influence of asymmetric foundation on soil-irregular structure system, the vibration equation considering foundation with mass eccentricity and stiffness eccentricity was established. A MATLAB program was developed based on the solution of the vibration equation decoupled by forcing decoupling method to analyze the influence of two kinds of foundation eccentricity on the structure. It concluded that mass eccentricity of foundation has slight impact on the structure, but the stiffness eccentricity has a large influence on the structure, especially on the torsional response. The conclusions derived by parametric research previously are verified by time history analysis of interaction system with foundation stiffness eccentricities of ?0.6 and 0.6.
In order to study the influence of asymmetric foundation on soil-irregular structure system, the vibration equation considering foundation with mass eccentricity and stiffness eccentricity was established. A MATLAB program was developed based on the solution of the vibration equation decoupled by forcing decoupling method to analyze the influence of two kinds of foundation eccentricity on the structure. It concluded that mass eccentricity of foundation has slight impact on the structure, but the stiffness eccentricity has a large influence on the structure, especially on the torsional response. The conclusions derived by parametric research previously are verified by time history analysis of interaction system with foundation stiffness eccentricities of ?0.6 and 0.6.
引文
[1]马升东,周德源,孙良宏.在水平荷载作用下不规则建筑结构的弹塑性反应综述[J].防灾减灾工程学报,2004,24(3):344―349.Ma Shengdong,Zhou Deyuan,Sun Lianghong.Review of inelastic earthquake response of Asymmetric buildings under horizontal loads[J].Journal of Disaster Prevention and Mitigation Engineering,2004,24(3):344―349.(inChinese)
[2]Geol R K,Chopra A K.Dual-level approach for seismic design of asymmetric-plan building[J].Journal of Structural Engineering,1994,120(1):161―170.
[3]刘畅,邹银生.设计偏心距对偏心结构弹塑性扭转反应的影响[J].湖南大学学报(自然科学版),2007,34(4):15―18.Liu Chang,Zou Yinsheng.Influence of design eccentricity on the inelastic torsional response of asymmetric structure[J].Journal of Hunan University(Natural Sciences),2007,34(4):15―18.(in Chinese)
[4]陈跃庆,吕西林.结构-地基相互作用体系动力特性参数的简化计算方法[J].地震工程与工程振动,2003,23(1):71―77.Chen Yueqing,Lu Xilin.Simplified method for calculating dynamic characteristics of soil-structure interaction system[J].Earthquake Engineering and Engineering Vibration,2003,23(1):71―77.(in Chinese)
[5]Shakib H.Evaluation of dynamic eccentricity by considering soil-structure interaction:a proposal for seismic design codes[J].Soil Dynamics and Earthquake Engineering,2004,24(5):369―378.
[6]Shakib H.Dynamic soil-structure interaction effects on the seismic response of asymmetric buildings[J].Soil Dynamics and Earthquake Engineering,2004,24(5):379―388.
[7]Sittipong Jarernprasert.Inelastic design approach for asymmetric structure-foundation systems[M].Pittsburgh:Carnegie Mellon University,2005.
[8]霍毅.土-偏心结构相互作用地震反应的参数分析[D].天津:天津大学,2006.Huo Yi.Parameter analysis on the seismic behaviour of soil-asymmetric structure interaction System[D].Tianjin:Tianjin University,2006.(in Chinese)
[9]王学艳.偏心结构-地基土相互作用平扭耦联参数分析[D].天津:天津大学,2007.Wang Xueyan.Parameter analysis on lateral-torsional coupling of soil-asymmetric structure interaction system[D].Tianjin:Tianjin University,2007.(in Chinese)
[10]刘大海,杨翠如,钟锡根.高层建筑抗震设计[M].北京:中国建筑工业出版社,1993.Liu Dahai,Yang Cuiru,Zhong Xigen.Seismic design of tall buildings[M].Beijing:China Architectural Industrial Press,1993.(in Chinese)
[2]Geol R K,Chopra A K.Dual-level approach for seismic design of asymmetric-plan building[J].Journal of Structural Engineering,1994,120(1):161―170.
[3]刘畅,邹银生.设计偏心距对偏心结构弹塑性扭转反应的影响[J].湖南大学学报(自然科学版),2007,34(4):15―18.Liu Chang,Zou Yinsheng.Influence of design eccentricity on the inelastic torsional response of asymmetric structure[J].Journal of Hunan University(Natural Sciences),2007,34(4):15―18.(in Chinese)
[4]陈跃庆,吕西林.结构-地基相互作用体系动力特性参数的简化计算方法[J].地震工程与工程振动,2003,23(1):71―77.Chen Yueqing,Lu Xilin.Simplified method for calculating dynamic characteristics of soil-structure interaction system[J].Earthquake Engineering and Engineering Vibration,2003,23(1):71―77.(in Chinese)
[5]Shakib H.Evaluation of dynamic eccentricity by considering soil-structure interaction:a proposal for seismic design codes[J].Soil Dynamics and Earthquake Engineering,2004,24(5):369―378.
[6]Shakib H.Dynamic soil-structure interaction effects on the seismic response of asymmetric buildings[J].Soil Dynamics and Earthquake Engineering,2004,24(5):379―388.
[7]Sittipong Jarernprasert.Inelastic design approach for asymmetric structure-foundation systems[M].Pittsburgh:Carnegie Mellon University,2005.
[8]霍毅.土-偏心结构相互作用地震反应的参数分析[D].天津:天津大学,2006.Huo Yi.Parameter analysis on the seismic behaviour of soil-asymmetric structure interaction System[D].Tianjin:Tianjin University,2006.(in Chinese)
[9]王学艳.偏心结构-地基土相互作用平扭耦联参数分析[D].天津:天津大学,2007.Wang Xueyan.Parameter analysis on lateral-torsional coupling of soil-asymmetric structure interaction system[D].Tianjin:Tianjin University,2007.(in Chinese)
[10]刘大海,杨翠如,钟锡根.高层建筑抗震设计[M].北京:中国建筑工业出版社,1993.Liu Dahai,Yang Cuiru,Zhong Xigen.Seismic design of tall buildings[M].Beijing:China Architectural Industrial Press,1993.(in Chinese)
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