CFRP索大跨斜拉桥的非线性地震响应控制分析
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摘要
为探讨碳纤维增强塑料(CFRP)索斜拉桥与普通钢索斜拉桥的地震响应控制优劣性,基于现有试验,以苏通长江公路大桥为参考建立有限元模型,采用等轴向刚度准则换索,并在墩梁、塔梁处设置弹性连接装置和阻尼器作为减震装置;基于弹塑性抗震理论和地震响应分析结果,通过对目标函数作参数敏感性分析,获得不同配索斜拉桥对应于各减震装置的合理设计参数,并比较2种索斜拉桥减震控制的优劣。结果表明:选取相同减震设计参数时,CFRP索斜拉桥可获得较优的减震效果;阻尼器的减震效果比弹性连接装置更优,尤其在内力控制方面。
In order to explore and discuss advantages and disadvantages of seismic response control of the long-span cable-stayed bridge with carbon fiber reinforced plastics(CFRP) cables and conventional cable-stayed bridge with steel cables,taking Sutong Yangtze River Bridge as a reference,the finite element model was established on the basis of existing test.Steel cables were replaced with the CFRP cables by using the axial stiffness equivalent principle in the model.The elastic link device and the damper were set as seismic reduction devices in pier-girder and pylon-girder.Based on the theory of elastic-plastic seismic resistance and the results of seismic response analysis,the parameter sensitivities of object functions were analyzed to obtain rational design parameters of each seismic reduction device.The advantages and disadvantages of seismic reduction control of the cable-stayed bridges with two kinds of cables were compared.The result shows that the bridge with CFRP cables has better seismic reduction effect than the steel cable-stayed bridge with the same seismic reduction design parameters,and the seismic reduction effect of the damper is more effective than that of the elastic link device especially in the aspects of control of internal forces.
In order to explore and discuss advantages and disadvantages of seismic response control of the long-span cable-stayed bridge with carbon fiber reinforced plastics(CFRP) cables and conventional cable-stayed bridge with steel cables,taking Sutong Yangtze River Bridge as a reference,the finite element model was established on the basis of existing test.Steel cables were replaced with the CFRP cables by using the axial stiffness equivalent principle in the model.The elastic link device and the damper were set as seismic reduction devices in pier-girder and pylon-girder.Based on the theory of elastic-plastic seismic resistance and the results of seismic response analysis,the parameter sensitivities of object functions were analyzed to obtain rational design parameters of each seismic reduction device.The advantages and disadvantages of seismic reduction control of the cable-stayed bridges with two kinds of cables were compared.The result shows that the bridge with CFRP cables has better seismic reduction effect than the steel cable-stayed bridge with the same seismic reduction design parameters,and the seismic reduction effect of the damper is more effective than that of the elastic link device especially in the aspects of control of internal forces.
引文
[1]周云.粘滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006.ZHOU Yun.Design of Seismic Reduction Structure ofViscous Damper[M].Wuhan:Wuhan University ofTechnology Press,2006.
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[9]刘荣桂,李成绩,龚向华,等.碳纤维斜拉索的动力参数特性分析[J].哈尔滨工业大学学报,2008,40(8):1284-1288.LI U Rong-gui,LI Cheng-ji,GONG Xiang-hua,et al.Analysis of Dynamic Properties for CFRP StayedCables[J].Journal of HarbinInstitute of Technology,2008,40(8):1284-1288.
[10]刘荣桂,许飞,蔡东升,等.CFRP拉索斜拉桥静载试验分析[J].中国公路学报,2009,22(2):48-52.LI U Rong-gui,XU Fei,CAI Dong-sheng,et al.Analy-sis of Static Load Test for Cable-stayed Bridge withCFRP Cables[J].China Journal of Highway andTransport,2009,22(2):48-52.
[11]刘荣桂,周士金,许飞,等.CFRP拉索斜拉桥模态试验与分析[J].桥梁建设,2009(3):29-32.LI U Rong-gui,ZHOU Shi-jin,XU Fei,et al.ModelTest and Analysis for Cable-stayed Bridge Used withCFRP Stay Cables[J].Bridge Construction,2009(3):29-32.
[12]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.WANG Ke-hai.Seismic Resistance Research of Bridge[M].Beijing:China Rail way Publishing House,2007.
[13]RUANGRASSAMEE A,KAWASHI MA K.SeismicResponse Control of a Cable-stayed Bridge by Vari-able Dampers[J].Journal of Earthquake Engineering,2006,10(1):153-165.
[14]CHANG C M,LOH C H.Seismic Response Controlof Cable-stayed Bridge Using Different Control Strat-egies[J].Journal of Earthquake Engineering,2006,10(4):481-508.
[15]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼器参数研究[J].同济大学学报:自然科学版,2007,35(6):728-733.LIANG Zhi-yao,LI Jian-zhong.Research on DamperParameters of Long-span Rail-cum-road Cable-stayedBridge[J].Journal of Tongji University:Natural Sci-ence,2007,35(6):728-733.
[2]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报,2004,37(12):38-43.YE Ai-jun,HU Shi-de,FAN Li-chu.Seismic Dis-placement Control for Super-long-span Cable-stayedBridges[J].China Civil Engineering Journal,2004,37(12):38-43.
[3]GRACE N F,NAVARRE F C,NACEY R,et al.De-sign-construction of Bridge Street Bridge-FirstCFRP Bridge in the United States[J].PCI Journal,2002,47(5):20-35.
[4]梅葵花,吕志涛.CFRP在超大跨悬索桥和斜拉桥中的应用前景[J].桥梁建设,2002(2):75-78.MEI Kui-hua,LU Zhi-tao.Application Prospect ofCFRP to Super Length Suspension Bridge and Cable-stayed Bridge[J].Bridge Construction,2002(2):75-78.
[5]张新军,应磊东.超大跨度CFRP索斜拉桥的力学性能分析[J].公路交通科技,2008,25(10):74-78.ZHANG Xin-jun,YING Lei-dong.Mechanical Prop-erties of Super Long-span Cable-stayed Bridges UsingCFRP Cables[J].Journal of Highway and Transpor-tation Research and Development,2008,25(10):74-78.
[6]张治成,谢旭,张鹤.应用碳纤维索的斜拉桥地震响应分析[J].工程力学,2008,25(增1):158-164,183.ZHANG Zhi-cheng,XIE Xu,ZHANG He.SeismicResponse Analysis of Cable-stayed Bridges UsingCarbon Fiber Composite Cable[J].EngineeringMechanics,2008,25(S1):158-164,183.
[7]吕志涛,梅葵花.国内首座CFRP索斜拉桥的研究[J].土木工程学报,2007,40(1):54-59.LU Zhi-tao,MEI Kui-hua.First Application of CFRPCables for a Cable-stayed Bridge in China[J].ChinaCivil Engineering Journal,2007,40(1):54-59.
[8]刘荣桂,李成绩,蒋峰,等.碳纤维斜拉索的静力参数特性分析[J].哈尔滨工业大学学报,2008,40(4):615-619.LI U Rong-gui,LI Cheng-ji,JIANG Feng,et al.Char-acteristic Analysis of CFRP Cables in Static Param-eters[J].Journal of Harbin Institute of Technology,2008,40(4):615-619.
[9]刘荣桂,李成绩,龚向华,等.碳纤维斜拉索的动力参数特性分析[J].哈尔滨工业大学学报,2008,40(8):1284-1288.LI U Rong-gui,LI Cheng-ji,GONG Xiang-hua,et al.Analysis of Dynamic Properties for CFRP StayedCables[J].Journal of HarbinInstitute of Technology,2008,40(8):1284-1288.
[10]刘荣桂,许飞,蔡东升,等.CFRP拉索斜拉桥静载试验分析[J].中国公路学报,2009,22(2):48-52.LI U Rong-gui,XU Fei,CAI Dong-sheng,et al.Analy-sis of Static Load Test for Cable-stayed Bridge withCFRP Cables[J].China Journal of Highway andTransport,2009,22(2):48-52.
[11]刘荣桂,周士金,许飞,等.CFRP拉索斜拉桥模态试验与分析[J].桥梁建设,2009(3):29-32.LI U Rong-gui,ZHOU Shi-jin,XU Fei,et al.ModelTest and Analysis for Cable-stayed Bridge Used withCFRP Stay Cables[J].Bridge Construction,2009(3):29-32.
[12]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.WANG Ke-hai.Seismic Resistance Research of Bridge[M].Beijing:China Rail way Publishing House,2007.
[13]RUANGRASSAMEE A,KAWASHI MA K.SeismicResponse Control of a Cable-stayed Bridge by Vari-able Dampers[J].Journal of Earthquake Engineering,2006,10(1):153-165.
[14]CHANG C M,LOH C H.Seismic Response Controlof Cable-stayed Bridge Using Different Control Strat-egies[J].Journal of Earthquake Engineering,2006,10(4):481-508.
[15]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼器参数研究[J].同济大学学报:自然科学版,2007,35(6):728-733.LIANG Zhi-yao,LI Jian-zhong.Research on DamperParameters of Long-span Rail-cum-road Cable-stayedBridge[J].Journal of Tongji University:Natural Sci-ence,2007,35(6):728-733.
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