深水高墩连续刚构桥抗震性能分析
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摘要
以某深水高墩连续刚构桥为研究对象,利用附加质量法计算动水压力。根据JTG/T B02-01—2008《公路桥梁抗震设计细则》进行2水平2阶段抗震性能分析,运用SAP2000有限元程序,建立桥梁的空间有限元模型,进行反应谱分析和时程分析,比较在考虑动水压力和未考虑动水压力2种情况下的内力结果。考虑动水压力时,结构内力比未考虑动水压力时明显增大,纵向与横向地震作用下结构的地震响应规律并不完全相同。
Based on some deepwater high-pier continuous rigid frame bridge as the object of study,this paper calculates water pressure by means of added mass method.A 2-level and 2-stage analysis for seismic behavior is performed as per JTG/T B02-01-2008"Detailed Principles for Seismic Design of Highway Bridges",a spatial finite element model of bridge is established by applying SAP2000 finite element program,the analyses for response spectrum and time history are carried out,and the results on internal force under two cases,i.e.in and not in consideration of dynamic water pressure are compared.The structural internal force by considering dynamic water pressure obviously increases than that without considering dynamic water pressure,and the seismic response rules under the longitudinal and transversal seismic actions are not totally same.
Based on some deepwater high-pier continuous rigid frame bridge as the object of study,this paper calculates water pressure by means of added mass method.A 2-level and 2-stage analysis for seismic behavior is performed as per JTG/T B02-01-2008"Detailed Principles for Seismic Design of Highway Bridges",a spatial finite element model of bridge is established by applying SAP2000 finite element program,the analyses for response spectrum and time history are carried out,and the results on internal force under two cases,i.e.in and not in consideration of dynamic water pressure are compared.The structural internal force by considering dynamic water pressure obviously increases than that without considering dynamic water pressure,and the seismic response rules under the longitudinal and transversal seismic actions are not totally same.
引文
[1]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
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[3]高学奎,朱晞.地震动水压力对深水桥墩的影响[J].北京交通大学学报:自然科学版,2006(1):55-58.
[4]刘振宇,李乔,赵灿晖,等.深水矩形空心桥墩在地震作用下附加动水压力分析[J].振动与冲击,2008(2):53-56.
[5]单德山,李乔.高墩深水大跨度连续刚构桥非一致地震响应分析[J].重庆交通大学学报,2008(4):499-501.
[6]赖伟,王君杰,胡世德.地震下桥墩动水压力分析[J].同济大学学报:自然科学版,2004,32(1):1-5.
[7]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[8]杨沪湘,许航.高烈度地震山区桥梁抗震设计研究[J].公路,2007(8):246-250.
[9]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1996.
[10]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
[2]杜修力,王进廷.动水压力及其对坝体地震反应影响的研究进展[J].水利学报,2001(7):13-21.
[3]高学奎,朱晞.地震动水压力对深水桥墩的影响[J].北京交通大学学报:自然科学版,2006(1):55-58.
[4]刘振宇,李乔,赵灿晖,等.深水矩形空心桥墩在地震作用下附加动水压力分析[J].振动与冲击,2008(2):53-56.
[5]单德山,李乔.高墩深水大跨度连续刚构桥非一致地震响应分析[J].重庆交通大学学报,2008(4):499-501.
[6]赖伟,王君杰,胡世德.地震下桥墩动水压力分析[J].同济大学学报:自然科学版,2004,32(1):1-5.
[7]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[8]杨沪湘,许航.高烈度地震山区桥梁抗震设计研究[J].公路,2007(8):246-250.
[9]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1996.
[10]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
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