空心圆端型桥墩动力弹塑性分析
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摘要
针对桥墩常用的空心圆端型截面,选取不同的壁厚,采用非线性时程方法对(28+35+28)m三跨连续梁桥进行动力弹塑性分析,分别得到桥墩弹塑性铰转角、墩底剪力、墩底弯矩、墩顶位移时程,结果表明,空心截面壁厚取0.6m时,桥墩还能承受更强的地震。
On the commonly used hollow round end-section,adopting different wall-thickness,the author makes a dynamic elastoplastic analysis to three-span continuous beam bridge which covers the area of(28+35+28) m by means of nonlinear time-history approach.According to the a series of calculated statistics about hinge corner,end of pier shear,pier-end bending moment,pier top displacement time history,the author reaches the conclusion that pier could still withstand more damaging earthquake if the wall-thickness of hollow section is of 0.6m.
On the commonly used hollow round end-section,adopting different wall-thickness,the author makes a dynamic elastoplastic analysis to three-span continuous beam bridge which covers the area of(28+35+28) m by means of nonlinear time-history approach.According to the a series of calculated statistics about hinge corner,end of pier shear,pier-end bending moment,pier top displacement time history,the author reaches the conclusion that pier could still withstand more damaging earthquake if the wall-thickness of hollow section is of 0.6m.
引文
[1]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006.
[2]F.A.Zahn,R.Park,and M.J.N.Priestley.Flexural Strength and Ductil-ity of Circular Hollow Reinforced Concrete Columns without Con-finement on Inside face[J].ACI Structure Journal.Vol.87,No.2,MAR-APR.1990.
[3]公路桥梁抗震设计细则[M].北京:人民交通出版社,2008.
[4]陈光明等.某斜拉桥的弹塑性抗震性能研究[J].武汉理工大学学报,2004.
[5]弓俊青,朱.钢筋混凝土空心圆端墩柱截面弯曲承载力和延性的分析研究[J].土木工程学报,2001.
[2]F.A.Zahn,R.Park,and M.J.N.Priestley.Flexural Strength and Ductil-ity of Circular Hollow Reinforced Concrete Columns without Con-finement on Inside face[J].ACI Structure Journal.Vol.87,No.2,MAR-APR.1990.
[3]公路桥梁抗震设计细则[M].北京:人民交通出版社,2008.
[4]陈光明等.某斜拉桥的弹塑性抗震性能研究[J].武汉理工大学学报,2004.
[5]弓俊青,朱.钢筋混凝土空心圆端墩柱截面弯曲承载力和延性的分析研究[J].土木工程学报,2001.
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