双塔连体结构在耦合地震作用下的抗震性能研究
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摘要
地震作用下双塔连体结构体系的变形和内力分布较为复杂,针对某一大底盘对称双塔连体结构,应用大型通用有限元软件建立结构的整体非线性分析模型,对该结构进行动力特性分析。同时对结构进行只输入水平向地震动、只输入竖向地震动和输入水平竖向耦合地震动三种不同工况的非线性时程分析,通过对比分析三种工况下的动力响应,研究相同烈度、相同水准的不同地震动对结构响应的影响。分析表明,其他条件相同时,在不同地震波作用下,对连体结构竖向位移起主要控制作用的因素不同。通过对计算结果的分析,可以比较全面地掌握连体结构的抗震性能,为连体结构进一步的研究和设计提供一定的理论参考依据。
The deformations and the internal forces of the double-tower connected structure(DTCS) under earthquake are very complicated.The whole nonlinear model of a DTCS was established by commercial finite element software and the dynamic characteristics of the structure were analyzed.The nonlinear time history analysis was carried out in three cases of seismic ground motion input,one with horizontal ground motion input only,one with vertical ground motion input only and the other with both horizontal and vertical ground motion inputs.By comparing the results of the structure response under three cases,the effect of the same intensity,the same level of different ground motion to the structural response was investigated.The study results show that the primary control factor to the vertical displacement of the structure results differently in the same condition.The conclusion help the mastery of DTCS seismic behavior and provide certain theoretical basis for further research and design of the DTCS.
The deformations and the internal forces of the double-tower connected structure(DTCS) under earthquake are very complicated.The whole nonlinear model of a DTCS was established by commercial finite element software and the dynamic characteristics of the structure were analyzed.The nonlinear time history analysis was carried out in three cases of seismic ground motion input,one with horizontal ground motion input only,one with vertical ground motion input only and the other with both horizontal and vertical ground motion inputs.By comparing the results of the structure response under three cases,the effect of the same intensity,the same level of different ground motion to the structural response was investigated.The study results show that the primary control factor to the vertical displacement of the structure results differently in the same condition.The conclusion help the mastery of DTCS seismic behavior and provide certain theoretical basis for further research and design of the DTCS.
引文
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[2]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007Wang Xinmin.ANSYS numerical analysis of engineering structures[M].BeiJing:China Communications Press,2007
[3]爱德华·L·威尔逊.结构静力与动力分析[M].北京:中国建筑工业出版社,2006Wilson E L.Three-dimensional static and dynamic analysis of structures[M].Computers and Structures.Berkeley:CSi,2002
[4][美]R.克拉犬,J.彭津.结构动力学[M].王光远等译校.北京:高等教育出版社,2006Clough R W,Penzien J.Dynamics of structures[R].1975
[5]张新培.钢筋混凝土抗震结构非线性分析[M].北京:科学出版社,2003Zhang Xinpei.Nonlinear analysis of the aseismatic reinforced concrete structure[M].BeiJing:Science Press,2003
[6]杨红.曹晖,白绍良.地震波局部时频特性对结构非线性响应的影响[J].土木工程学报,2001(8):78-82Yang Hong,Cao Hui.Bai Shaoliang.Effects of local timefrequency characteristirs of earthquake wayes on structural nonlinear responses[J].China Civil Engineering Journal,2001(8):78-82
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