大型渡槽槽身的地震扭转效应研究
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摘要
通过多跨联合的横向地震激励的流固耦合计算分析,研究了横向地震激励下槽身的扭转效应。研究结果表明,在横向地震作用下,每跨两端支撑刚度的差异对槽身的扭矩影响不大,但是地震附加扭矩对槽身两端截面正应力的影响较大;对于简支槽身的渡槽,以跨中截面的弯曲内力作为控制条件来设计整个槽身是可以满足结构抗震安全要求的。
Torsion of a multi-span aqueduct body under lateral seismic excitation was studied by computational analysis of fluid structure interaction(FSI).The results show that under the condition of lateral earthquake waves,a difference in the stiffness at both ends of each aqueduct span has little influence on the torque of the aqueduct body,while the additional earthquake torque has a significant influence on the normal stresses of both end sections.For a simply supported beam aqueduct,the requirements of anti-seismic safety for its entire structure can still be met if the moment at the center section is adopted as the design threshold of its structure body.
Torsion of a multi-span aqueduct body under lateral seismic excitation was studied by computational analysis of fluid structure interaction(FSI).The results show that under the condition of lateral earthquake waves,a difference in the stiffness at both ends of each aqueduct span has little influence on the torque of the aqueduct body,while the additional earthquake torque has a significant influence on the normal stresses of both end sections.For a simply supported beam aqueduct,the requirements of anti-seismic safety for its entire structure can still be met if the moment at the center section is adopted as the design threshold of its structure body.
引文
[1]王博.大型渡槽动力建模研究[J].计算力学学报,2000,17(4):468-474.Wang Bo.Dynamic modeling study of large-scale aqueducts[J].Chinese Journal of Computational Mechanics,2000,17(4):468-474.(in Chinese)
[2]徐建国.大型渡槽结构考虑流固耦合的动力建模研究[J].南京理工大学学报(自然科学版),2005,29(6):639-644.XU Jianguo.Dynamic modeling study of aqueduct structure with fluid structure coupling[J].Journal of Nanjing University of Scince and Technology,2005,29(6):639-644.(in Chinese)
[3]徐梦华,莫海鸿.大跨度梁式渡槽改进拟三维流固耦合模型的三维模拟效果分析[J].振动与冲击,2010,29(6):207-210.XU Menghua,MO Haihong.Research on the3D-simulation effects of the improved pseudo3D FSI model of large span beam aqueduct[J].Journal of Vibration and Shock,2009,29(6):207-210.(in Chinese)
[4]Ji R C,Tang Y.Research on Transverse Seismic Response of High Pier Rectangle Aqueduct Considering Fluid-Structure Couppling.Environmental Vibrations:Prediction,Monitoring,Mitigation and Evaluation,Vols I and II,P:1327-1332,2009.
[5]Wang B,Huang L A,Xu J G,et al.Research on Semi-active Control With Mr Damper For Aqueduct under Longitudinal Earthquake Excitation.4th International Symposium on Lifetime Engineering of Civil Infrastructure P:565-569,2009.
[6]Ji D Y,Ma W L,Tong L P.Semi-analytical Finite Strip Element Method for Local Stability Analysis of Large-Scale Thin Shell Aqueduct[C]∥International Symposium on Innovation and Sustainability of Structures in Civil Engineering,Guangzhou,Peoples R China,Nov.28-30,2009.
[7]Ali Rafiee,Marc Vinches,Claude Bohatier.Modelling and analysis of the Nmes arena and the Arles aqueduct subjected to a seismic loading,using the non-smooth contact dynamics method[J].Engineering Structures,2008,30:3457-3467.
[8]WU Yi,MO Haihong,YANG Chun.Study on dynamic performance of a three-dimensional high frame supported U-shaped aqueduct[J].Engineering Structures,2006,28(3):372-380.
[9]徐梦华,莫海鸿.简支梁式渡槽考虑流固耦合的横向地震三维动力响应分析[J].工程抗震与加固改造,2009,31(5):29-33.XU Menghua,MO Haihong.Study on lateral seismic3D dynamic response of simply supported beam aqueduct considering FSI[J].Earthquake Resistant Engineering and Retrofiting,2009,31(5):29-33.(in Chinese)
[2]徐建国.大型渡槽结构考虑流固耦合的动力建模研究[J].南京理工大学学报(自然科学版),2005,29(6):639-644.XU Jianguo.Dynamic modeling study of aqueduct structure with fluid structure coupling[J].Journal of Nanjing University of Scince and Technology,2005,29(6):639-644.(in Chinese)
[3]徐梦华,莫海鸿.大跨度梁式渡槽改进拟三维流固耦合模型的三维模拟效果分析[J].振动与冲击,2010,29(6):207-210.XU Menghua,MO Haihong.Research on the3D-simulation effects of the improved pseudo3D FSI model of large span beam aqueduct[J].Journal of Vibration and Shock,2009,29(6):207-210.(in Chinese)
[4]Ji R C,Tang Y.Research on Transverse Seismic Response of High Pier Rectangle Aqueduct Considering Fluid-Structure Couppling.Environmental Vibrations:Prediction,Monitoring,Mitigation and Evaluation,Vols I and II,P:1327-1332,2009.
[5]Wang B,Huang L A,Xu J G,et al.Research on Semi-active Control With Mr Damper For Aqueduct under Longitudinal Earthquake Excitation.4th International Symposium on Lifetime Engineering of Civil Infrastructure P:565-569,2009.
[6]Ji D Y,Ma W L,Tong L P.Semi-analytical Finite Strip Element Method for Local Stability Analysis of Large-Scale Thin Shell Aqueduct[C]∥International Symposium on Innovation and Sustainability of Structures in Civil Engineering,Guangzhou,Peoples R China,Nov.28-30,2009.
[7]Ali Rafiee,Marc Vinches,Claude Bohatier.Modelling and analysis of the Nmes arena and the Arles aqueduct subjected to a seismic loading,using the non-smooth contact dynamics method[J].Engineering Structures,2008,30:3457-3467.
[8]WU Yi,MO Haihong,YANG Chun.Study on dynamic performance of a three-dimensional high frame supported U-shaped aqueduct[J].Engineering Structures,2006,28(3):372-380.
[9]徐梦华,莫海鸿.简支梁式渡槽考虑流固耦合的横向地震三维动力响应分析[J].工程抗震与加固改造,2009,31(5):29-33.XU Menghua,MO Haihong.Study on lateral seismic3D dynamic response of simply supported beam aqueduct considering FSI[J].Earthquake Resistant Engineering and Retrofiting,2009,31(5):29-33.(in Chinese)
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