连续刚构桥的Pushover分析与应用
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摘要
采用Pushover分析方法对某连续刚构桥梁进行地震响应分析,分别建立考虑桩土作用与不计桩土作用的计算模型,进行Pushover分析和性能评价,将得到的结果进行对比分析。研究结果表明:对桥梁结构进行Pushover分析时,考虑桩土作用对结构的能力曲线和目标位移影响较大,不可忽视;同时,对塑性铰出现在隐蔽部分的问题,提出了解决的方法,并进行了验证,获得了满意的结果。算例分析结果可为同类桥梁抗震设计提供参考。
The seismic response analysis for a continuous rigid frame bridge was performed by application of the pushover method.The coupled effect between the pile and soil was considered in the analytical model.The seismic response by neglecting the coupled effect of the pile and soil is also calculated.Two results were compared and discussed.The results show that the coupled effect should not be neglected.This coupled affect greatly affects the capacity spectrum and target displacement of the structure.In addition,the improvement suggestion for the problem of plastic hinge occurring in the hidden parts is proposed.The result is satisfying,which implies that the pushover method is valid for the bridge aseismatic design.
The seismic response analysis for a continuous rigid frame bridge was performed by application of the pushover method.The coupled effect between the pile and soil was considered in the analytical model.The seismic response by neglecting the coupled effect of the pile and soil is also calculated.Two results were compared and discussed.The results show that the coupled effect should not be neglected.This coupled affect greatly affects the capacity spectrum and target displacement of the structure.In addition,the improvement suggestion for the problem of plastic hinge occurring in the hidden parts is proposed.The result is satisfying,which implies that the pushover method is valid for the bridge aseismatic design.
引文
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[2]Une H,Kawashima K,Shoji G.Pushover analysis of a frame bridge[J].Journal of Structural Engineering,1999,45A:947-956.
[3]Fajfar P,Gaspersic P.A simplified nonlinear method for seismic evaluation of RC bridges[C]//Pro 6th US National Conference on Earthquake Engineering.Seattle,1998.
[4]Ballard T A,Sedarat H.SR5 Lake Washington Ship Canal Bridge pushover analysis[J].Computers and Sturctures,1999,72:63-80.
[5]ZHENG Yi,Tsutomu U,GE Han-bin Ge.Seismic response predictions of multi-span steel bridges through pushover analysis[J].Earthquanke Engineering and Structural Dynamics,2003,32:1259-1274.
[6]常岭.桥梁的抗震变形能力[J].工程抗震与加固改造,1987,3(4):20-26.CHANG Ling.Seismic deformability of bridge[J].Earthquake Resistant Engineering and Etrofitting,1987,3(4):20-26.
[7]王东升,翟桐,郭明珠.利用pushover方法分析桥梁的抗震安全性[J].世界地震工程,2000,16(2):47-51.WANG Dong-sheng,ZHAI Tong,GUO Ming-zhu.Estimated seismic vulnerability of bridges by push-over method[J].World Information on Earthquake Engineering,2000,16(2):47-51.
[8]冯峻辉,闫贵平,钟铁毅.地震工程中的静力弹塑性(pushover)分析法[J].贵州工业大学学报:自然科学版,2003,32(2):89-91.FENG Jun-hui,YAN Gui-ping,ZHUONG Tie-yi.Pushover analysis method in earthquake engineering[J].Journal of Guizhou University of Technology:Natural Science Edition,2003,32(2):89-91.
[9]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.XIE Xu.Smismic response and erathquake resistant design of bridge[M].Beijing:China Communications Press,2006.
[10]FEMA 273 & 274,Federal Emergency Management Agency,guidelines and commentary for the seismic rehabilitation of buildings[S].
[11]Helmut K.Pros and Cons of a push-over analysis of seismic performance evaluation[J].Engineering Structures,1998,20:452-464.
[12]潘龙.基于推倒分析方法的桥梁结构地震损伤分析与性能设计[D].上海:同济大学土木工程学院,2001.PAN Long.Seismic damage analysis and performance design of bridge structure based pushover analysis method[D].Shanghai:College of Civil Engineering,Tongji University,2001.
[13]JTJ 024—85,公路桥涵地基与基础设计规范[S].JTJ 024—85,Specifications for design of groundsill and foundation of highway bridges and culverts[S].
[14]崔高航.桥梁结构pushover方法研究[D].哈尔滨:中国地震局工程力学研究所,2003.CUI Gao-hang.Studies on push-over method of bridge structure[D].Harbin:Institute of Engineering Mechanics,China Earthqauke Administration,2003.
[15]汪大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45-53.WANG Da-sui,HE Jun-li,ZHANG Feng-xin.The basic principle and a case study of the static elastoplastic analysis(pushover analysis)[J].World Earthquake Engineering,2004,20(1):45-53.
[2]Une H,Kawashima K,Shoji G.Pushover analysis of a frame bridge[J].Journal of Structural Engineering,1999,45A:947-956.
[3]Fajfar P,Gaspersic P.A simplified nonlinear method for seismic evaluation of RC bridges[C]//Pro 6th US National Conference on Earthquake Engineering.Seattle,1998.
[4]Ballard T A,Sedarat H.SR5 Lake Washington Ship Canal Bridge pushover analysis[J].Computers and Sturctures,1999,72:63-80.
[5]ZHENG Yi,Tsutomu U,GE Han-bin Ge.Seismic response predictions of multi-span steel bridges through pushover analysis[J].Earthquanke Engineering and Structural Dynamics,2003,32:1259-1274.
[6]常岭.桥梁的抗震变形能力[J].工程抗震与加固改造,1987,3(4):20-26.CHANG Ling.Seismic deformability of bridge[J].Earthquake Resistant Engineering and Etrofitting,1987,3(4):20-26.
[7]王东升,翟桐,郭明珠.利用pushover方法分析桥梁的抗震安全性[J].世界地震工程,2000,16(2):47-51.WANG Dong-sheng,ZHAI Tong,GUO Ming-zhu.Estimated seismic vulnerability of bridges by push-over method[J].World Information on Earthquake Engineering,2000,16(2):47-51.
[8]冯峻辉,闫贵平,钟铁毅.地震工程中的静力弹塑性(pushover)分析法[J].贵州工业大学学报:自然科学版,2003,32(2):89-91.FENG Jun-hui,YAN Gui-ping,ZHUONG Tie-yi.Pushover analysis method in earthquake engineering[J].Journal of Guizhou University of Technology:Natural Science Edition,2003,32(2):89-91.
[9]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.XIE Xu.Smismic response and erathquake resistant design of bridge[M].Beijing:China Communications Press,2006.
[10]FEMA 273 & 274,Federal Emergency Management Agency,guidelines and commentary for the seismic rehabilitation of buildings[S].
[11]Helmut K.Pros and Cons of a push-over analysis of seismic performance evaluation[J].Engineering Structures,1998,20:452-464.
[12]潘龙.基于推倒分析方法的桥梁结构地震损伤分析与性能设计[D].上海:同济大学土木工程学院,2001.PAN Long.Seismic damage analysis and performance design of bridge structure based pushover analysis method[D].Shanghai:College of Civil Engineering,Tongji University,2001.
[13]JTJ 024—85,公路桥涵地基与基础设计规范[S].JTJ 024—85,Specifications for design of groundsill and foundation of highway bridges and culverts[S].
[14]崔高航.桥梁结构pushover方法研究[D].哈尔滨:中国地震局工程力学研究所,2003.CUI Gao-hang.Studies on push-over method of bridge structure[D].Harbin:Institute of Engineering Mechanics,China Earthqauke Administration,2003.
[15]汪大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45-53.WANG Da-sui,HE Jun-li,ZHANG Feng-xin.The basic principle and a case study of the static elastoplastic analysis(pushover analysis)[J].World Earthquake Engineering,2004,20(1):45-53.
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