Rayleigh波作用下桩-土-桥梁结构动力相互作用问题研究
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摘要
基于等效粘弹性人工边界单元建立了可考虑成层介质及Rayleigh波输入的二维有限元时域模型,计算了Rayleigh波作用下成层介质与均匀介质的自由场反应,与理论解比较表明有限元计算结果具有较好的工程精度。针对Rayleigh波作用下桩-土-典型刚构桥梁结构动力反应进行了分析,考虑了场地条件的不同、软夹层位置的改变、不同频率Rayleigh波的输入以及桩长对Rayleigh波传播与场地地震反应的影响,对影响因素进行了讨论。
A 2D finite element model for a semi-infinite space with layered media and Rayleigh wave input was built by using equivalent viscous-elastic artificial boundary elements.The responses in free-field of even and layered media were computed.The results indicated that the finite element method has excellent estimation precision compared with the theore tical solutions.The dynamic response of a pile-soil-bridge structure with dynamic interaction under Rayleigh waves was analyzed.A typical rigid frame bridge was included in this case study.The influence of different site conditions, changes of location of soft interlayer,different Rayleigh wave input and pile length on Rayleigh wave propagation and the seismic response were considered.The influencing factors of the rigid frame bridge structure were also discussed.
A 2D finite element model for a semi-infinite space with layered media and Rayleigh wave input was built by using equivalent viscous-elastic artificial boundary elements.The responses in free-field of even and layered media were computed.The results indicated that the finite element method has excellent estimation precision compared with the theore tical solutions.The dynamic response of a pile-soil-bridge structure with dynamic interaction under Rayleigh waves was analyzed.A typical rigid frame bridge was included in this case study.The influence of different site conditions, changes of location of soft interlayer,different Rayleigh wave input and pile length on Rayleigh wave propagation and the seismic response were considered.The influencing factors of the rigid frame bridge structure were also discussed.
引文
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[4]魏文晖,虞薇芳.动力设备荷载模拟及设备-桩基体系非线性动力分析[J].振动与冲击,2009,28(11):126-129.
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[8]王海东,尚守平.Rayleigh波作用下考虑桩土相互作用的单桩竖向动力响应计算研究[J].工程力学,2006, 23(8):74-78.
[9]王海东,尚守平,周志锦,等.瑞利波作用下桩土相互作用横向动力响应计算研究[J].湖南大学学报,2009, 36(11):1-5.
[10]陈云敏,吴世明.成层地基的Rayleigh波特征方程的解法[J].浙江大学学报,1991,25(1):40-52.
[11]黄茂松,任青,周仁义,等.层状地基中Rayleigh波随深度的衰减特性[J].岩土力学,2009,30(1):113-122.
[12]刘晶波,李彬.Rayleigh波作用下地下结构的动力反应分析[J].工程力学,2006,23(10);132-135.
[13]李彬,刘晶波.粘弹性人工边界在Marc中的实现[C]//第十四届全国结构工程学术会议论文集第1册.烟台;工程力学杂志社,2005.
[14]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1070-1075.
[2]吴忠良,陈运泰,牟其铎.核爆炸地震学概要[M].北京:地震出版社,1994.
[3]张永利,李杰.海洋环境下桩-土相互作用问题的数值解[J].振动与冲击,2009,28(12):160-163.
[4]魏文晖,虞薇芳.动力设备荷载模拟及设备-桩基体系非线性动力分析[J].振动与冲击,2009,28(11):126-129.
[5]夏唐代,蔡袁强,陈云敏,等.利用Rayleigh面波特性计算动力响应的进一步探讨[J].岩土工程学报,1996,18(3): 28-34.
[6]王立忠,冯永正,柯瀚.Rayleigh波作用下成层地基中单桩横向振动分析[J].振动工程学报,2001,14(2):205- 210.
[7]冯永正,王立忠,陈云敏,等.Rayleigh波作用下双层地基中群桩横向动力响应[J].振动工程学报,2001,14(3): 284-291.
[8]王海东,尚守平.Rayleigh波作用下考虑桩土相互作用的单桩竖向动力响应计算研究[J].工程力学,2006, 23(8):74-78.
[9]王海东,尚守平,周志锦,等.瑞利波作用下桩土相互作用横向动力响应计算研究[J].湖南大学学报,2009, 36(11):1-5.
[10]陈云敏,吴世明.成层地基的Rayleigh波特征方程的解法[J].浙江大学学报,1991,25(1):40-52.
[11]黄茂松,任青,周仁义,等.层状地基中Rayleigh波随深度的衰减特性[J].岩土力学,2009,30(1):113-122.
[12]刘晶波,李彬.Rayleigh波作用下地下结构的动力反应分析[J].工程力学,2006,23(10);132-135.
[13]李彬,刘晶波.粘弹性人工边界在Marc中的实现[C]//第十四届全国结构工程学术会议论文集第1册.烟台;工程力学杂志社,2005.
[14]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1070-1075.
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