干接缝节段拼装桥墩集中塑性铰模型的地震响应分析
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摘要
针对节段拼装桥墩的构造特点,采用集中塑性铰分析方法对节段拼装桥墩进行了循环荷载分析和非线性时程分析。首先编制了五种不同类型桥墩的截面弯距曲率分析程序,然后根据试验结果确定各种桥墩的加卸载规律,最后采用集中塑性铰方法进行了各种桥墩模型试件在各个试验工况下的拟静力荷载位移滞回曲线、非线性时程激励下的墩顶最大位移等地震反应规律的比较。与试验结果的分析比较表明:集中塑性铰分析方法是分析节段拼装桥墩抗震性能的有效分析方法。
Based on the configuration character of precast segmental bridge columns, the simplified concentrated plastic hinge method was applied to model the specimens of an experimental project under cyclic loading and time history loading. The section moment-curvature analytical program of the five different kinds of concrete bridge columns were written firstly. And the loading and unloading rules of each kind of bridge column were gained according to the experimental results. Lastly, the load-displacement hysteretic loops of each specimen under cyclic loading and the maximum displacement of the center of mass under time history loading cases were calculated with the simplified concentrated plastic hinge method. By comparing the calculated results with the experimental results, it is pointed out that the concentrated plastic hinge method can be applied to the seimic performance analysis of precast segmental bridge columns effectively.
Based on the configuration character of precast segmental bridge columns, the simplified concentrated plastic hinge method was applied to model the specimens of an experimental project under cyclic loading and time history loading. The section moment-curvature analytical program of the five different kinds of concrete bridge columns were written firstly. And the loading and unloading rules of each kind of bridge column were gained according to the experimental results. Lastly, the load-displacement hysteretic loops of each specimen under cyclic loading and the maximum displacement of the center of mass under time history loading cases were calculated with the simplified concentrated plastic hinge method. By comparing the calculated results with the experimental results, it is pointed out that the concentrated plastic hinge method can be applied to the seimic performance analysis of precast segmental bridge columns effectively.
引文
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[5]Hewes J T.Seismic design and performance of precast concrete segmental bridge columns[D].California:University of California,San Diego,2002.
[6]Chou Chung-Che,Chen Yu-Chih.Cyclic tests of post tensioned precast CFT segmental bridge columns with unbonded strands[J].Earthquake Engineering and Structural Dynamics,2006,35:159―175.
[7]Kurama Y C,Pessiki S,Sause R,Lu L W.Seismic behavior and design of unbonded post-tensioned precast concrete walls[J].PCI Journal,1999,44(3):72―89.
[8]David G Hieber,Jonathan M Wacker.Precast concrete pier systems for rapid construction of bridges in seismic regions[R].Washington:Department of Transportation,Washington State Transportation Commission,2005.
[9]葛继平,魏红一,王志强.循环荷载作用下预制拼装桥墩抗震性能分析[J].同济大学学报(自然科学版),2008,36(7):894―899.Ge Jiping,Wei Hongyi,Wang Zhiqiang.Seismic performance of precast segmental bridge column under cyclic loading[J].Journal of Tongji University(Natural Science),2008,36(7):894―899.(in Chinese)
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[11]Silvia Mazzoni,Frank McKenna,Michael H.Open system for earthquake engineering simulation user manual[M].California:Pacific Earthquake Engineering Research Center,Berkeley,University of California,2005.
[2]Priestley M J N,Seible F,Calvi G M.Seismic design and retrofit of bridges[M].New York:John Wiley&Sons,1996.
[3]葛继平.节段拼装桥墩抗震性能试验研究与理论分析[D].上海:同济大学,2008.Ge Jiping.Experimental and theoretical studies on seismic performance of precast segmental bridge columns[D].Shanghai:Tongji University,2008.(in Chinese)
[4]Hieber David G,Wacker Jonathan M.State-of-the-art report on precast concrete systems for rapid construction of bridges[R].Washington:Department of Transportation,Washington State Transportation Commission,2005.
[5]Hewes J T.Seismic design and performance of precast concrete segmental bridge columns[D].California:University of California,San Diego,2002.
[6]Chou Chung-Che,Chen Yu-Chih.Cyclic tests of post tensioned precast CFT segmental bridge columns with unbonded strands[J].Earthquake Engineering and Structural Dynamics,2006,35:159―175.
[7]Kurama Y C,Pessiki S,Sause R,Lu L W.Seismic behavior and design of unbonded post-tensioned precast concrete walls[J].PCI Journal,1999,44(3):72―89.
[8]David G Hieber,Jonathan M Wacker.Precast concrete pier systems for rapid construction of bridges in seismic regions[R].Washington:Department of Transportation,Washington State Transportation Commission,2005.
[9]葛继平,魏红一,王志强.循环荷载作用下预制拼装桥墩抗震性能分析[J].同济大学学报(自然科学版),2008,36(7):894―899.Ge Jiping,Wei Hongyi,Wang Zhiqiang.Seismic performance of precast segmental bridge column under cyclic loading[J].Journal of Tongji University(Natural Science),2008,36(7):894―899.(in Chinese)
[10]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社,1997.Lu Xilin,Jin Guofang,Wu Xiaohan.Theory and application of nonlinear analysis of reinforced concrete structures[M].Shanghai:Tongji University Press,1997.(in Chinese)
[11]Silvia Mazzoni,Frank McKenna,Michael H.Open system for earthquake engineering simulation user manual[M].California:Pacific Earthquake Engineering Research Center,Berkeley,University of California,2005.
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