桥墩截面形式对弯连续刚构桥地震响应的影响
|
摘要
为了研究桥墩截面形式对弯连续刚构桥动力及地震响应的影响,以某工程实例为背景,建立了空间有限元分析模型,研究了桥墩外形尺寸、截面面积、截面纵向刚度等参数对结构自振特性的影响,在此基础上,利用线弹性时程法,对比分析了这些参数变化对空心墩与实心墩结构地震响应的影响。研究结果表明,桥墩截面形式的不同使得结构的振型系列发生了改变,具有空心墩的连续刚构桥与具有实心墩的连续刚构桥相比,当两者的外形尺寸相同时,前者的频率较低,当两者桥墩面积相同时,前者频率较高,在纵向刚度相同的情况下,前者频率稍低;采用空心墩时,墩底应力及主梁位移比相应实心墩的小,当桥墩纵向刚度相同时,空心墩和实心墩的地震响应基本相同。
In order to study the influence of pier section on the dynamic and seismic responses of curved continuous rigid frame bridge,a current bridge was taken as an example,and its finite element model was set up to analyze three parameters' effects on the structure's natural vibration characteristics.The parameters include external dimensions,section area and section longitudinal rigidity of the pier.Then liner elastic time history analysis method was adopted to deduce the effects of the parameters on the seismic response of hollow pier or solid pier structure.The results show that the mode shape sequence changes with different section types of the pier:for the continuous rigid frame bridges,(1) if the external dimensions of the hollow pier is the same to that of the solid pier,the frequencies of the former are lower than those of the latter;(2) if the section areas of the two kinds of pier are the same,the frequencies of the former are higher than those of the latter;(3) if the two kinds of pier have the same longitudinal rigidity,the seismic response of the former is basically as same as that of the latter.(4)under the earthquake excitation,the stress at the bottom of the hollow pier and the displacement of the superstructure are less than those of bridge with solid pier.
In order to study the influence of pier section on the dynamic and seismic responses of curved continuous rigid frame bridge,a current bridge was taken as an example,and its finite element model was set up to analyze three parameters' effects on the structure's natural vibration characteristics.The parameters include external dimensions,section area and section longitudinal rigidity of the pier.Then liner elastic time history analysis method was adopted to deduce the effects of the parameters on the seismic response of hollow pier or solid pier structure.The results show that the mode shape sequence changes with different section types of the pier:for the continuous rigid frame bridges,(1) if the external dimensions of the hollow pier is the same to that of the solid pier,the frequencies of the former are lower than those of the latter;(2) if the section areas of the two kinds of pier are the same,the frequencies of the former are higher than those of the latter;(3) if the two kinds of pier have the same longitudinal rigidity,the seismic response of the former is basically as same as that of the latter.(4)under the earthquake excitation,the stress at the bottom of the hollow pier and the displacement of the superstructure are less than those of bridge with solid pier.
引文
[1]周军生,楼庄鸿.大跨径预应力混凝土连续刚构桥的现状和发展趋势[J].中国公路学报,2000,13(1):31-37.ZHOU Junsheng,LOU Zhuanghong.The Status Quo and De-veloping Trends of Large Span Prestressed Concrete Bridges withContinuous Rigid Frame Structure[J].China Journal of High-way and Transport,2000,13(1):31-37.
[2]李艳明,王留洋.空心墩和实心墩对连续刚构桥受力影响的比较[J].铁道标准设计,2005(6):63-65.LI Yanming,WANG Liuyang.Hollow Pier and Solid Pier tothe Forces on Continuous Framed Structure Bridge[J].Rail-way Standard Design,2005(6):63-65.
[3]徐君兰,顾安邦.连续刚构桥主墩刚度合理性的探讨[J].公路交通科技,2005,22(2):59-62.XU Junlan,GU Anbang.Discussion of Rationality of Rigidityof Continuous Rigid Frame Bridge[J].Journal of Highwayand Transportation Research and Development,2005,22(2):59-62.
[4]王常峰,陈兴冲,夏修身.高墩大跨连续刚构桥抗震设计参数优化[J].公路交通科技,2006,23(4):80-83.WANG Changfeng,CHEN Xingchong,XIA Xiushen.Optimiz-ation of Design Parameters of High-pier and Long-span Continu-ous Frigid Frame Bridge[J].Journal of Highway and Trans-portation Research and Development,2006,23(4):80-83.
[5]周勇军,全伟,贺拴海.基于正交试验的连续刚构桥地震响应敏感性参数分析[J].地震研究,2006,29(2):176-181.ZHOU Yongjun,QUAN Wei,HE Shuanhai.Analysis on Sen-sitive Parameters to Earthquake Response of Continuous RigidFrame Bridges Based on Cross Test Technique[J].Journal ofSeismological Research,2006,29(2):176-181.
[6]周勇军,贺拴海,宋一凡,等.连续刚构桥单双薄壁墩地震响应的对比分析[J].中外公路,2007,27(3):114-117.ZHOU Yongjun,HE Shuanhai,SONG Yifan,et al.Comparisonof Earthquake Response of Continuous Rigid Frame Bridge withSingle or Double Thin-wall Pier[J].Journal of China&ForeignHighway,2007,27(3):114-117.
[7]王波,张海龙,武修雄,等.基于大质量法的高墩大跨连续刚构桥地震时程反应分析[J].桥梁建设,2006(5):17-20.WANG Bo,ZHANG Hailong,WU Xiuxiong,et al.Analysisof Seismic Time-history Response of High-rise Pier and LongSpan Continuous Rigid-frame Bridge Based on Great MassMethod[J].Bridge Construction,2006(5):17-20.
[8]何波,朱宏平,李俊,等.大跨薄壁墩连续刚构桥抗震性能分析[J].华中科技大学学报(城市科学版),2006,23(4):51-56.HE Bo,ZHU Hongping,LI Jun,et al.Antiseismic PerformanceAnalysis of a Large-span Continuous Rigid Frame Bridge[J].Journal of Huazhong University of Science and Technology(UrbanScience Edition),2006,23(4):51-56.
[9]周勇军,贺拴海,宋一凡,等.基于锤击法的弯连续刚构模型桥动力试验[J].振动、测试与诊断,2007,27(3):212-215.ZHOU Yongjun,HE Shuanhai,SONG Yi-fan,et al.DynamicTest of Curved Continuous Rigid Frame Bridge Model UsingHammer Excitation Method[J].Journal of Vibration,Mea-surement&Diagnosis,2007,27(3):212-215.
[10]范立础.桥梁抗震[M].上海:同济大学出版社,1997.FAN Lichu.Earthquake Resistance of Bridge[M].Shanghai:Tongji University Press,1997.
[11]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2000.SONG Yifan.Dynamic Mechanics of Highway Bridge[M].Bei-jing:China Communications Press,2000.
[2]李艳明,王留洋.空心墩和实心墩对连续刚构桥受力影响的比较[J].铁道标准设计,2005(6):63-65.LI Yanming,WANG Liuyang.Hollow Pier and Solid Pier tothe Forces on Continuous Framed Structure Bridge[J].Rail-way Standard Design,2005(6):63-65.
[3]徐君兰,顾安邦.连续刚构桥主墩刚度合理性的探讨[J].公路交通科技,2005,22(2):59-62.XU Junlan,GU Anbang.Discussion of Rationality of Rigidityof Continuous Rigid Frame Bridge[J].Journal of Highwayand Transportation Research and Development,2005,22(2):59-62.
[4]王常峰,陈兴冲,夏修身.高墩大跨连续刚构桥抗震设计参数优化[J].公路交通科技,2006,23(4):80-83.WANG Changfeng,CHEN Xingchong,XIA Xiushen.Optimiz-ation of Design Parameters of High-pier and Long-span Continu-ous Frigid Frame Bridge[J].Journal of Highway and Trans-portation Research and Development,2006,23(4):80-83.
[5]周勇军,全伟,贺拴海.基于正交试验的连续刚构桥地震响应敏感性参数分析[J].地震研究,2006,29(2):176-181.ZHOU Yongjun,QUAN Wei,HE Shuanhai.Analysis on Sen-sitive Parameters to Earthquake Response of Continuous RigidFrame Bridges Based on Cross Test Technique[J].Journal ofSeismological Research,2006,29(2):176-181.
[6]周勇军,贺拴海,宋一凡,等.连续刚构桥单双薄壁墩地震响应的对比分析[J].中外公路,2007,27(3):114-117.ZHOU Yongjun,HE Shuanhai,SONG Yifan,et al.Comparisonof Earthquake Response of Continuous Rigid Frame Bridge withSingle or Double Thin-wall Pier[J].Journal of China&ForeignHighway,2007,27(3):114-117.
[7]王波,张海龙,武修雄,等.基于大质量法的高墩大跨连续刚构桥地震时程反应分析[J].桥梁建设,2006(5):17-20.WANG Bo,ZHANG Hailong,WU Xiuxiong,et al.Analysisof Seismic Time-history Response of High-rise Pier and LongSpan Continuous Rigid-frame Bridge Based on Great MassMethod[J].Bridge Construction,2006(5):17-20.
[8]何波,朱宏平,李俊,等.大跨薄壁墩连续刚构桥抗震性能分析[J].华中科技大学学报(城市科学版),2006,23(4):51-56.HE Bo,ZHU Hongping,LI Jun,et al.Antiseismic PerformanceAnalysis of a Large-span Continuous Rigid Frame Bridge[J].Journal of Huazhong University of Science and Technology(UrbanScience Edition),2006,23(4):51-56.
[9]周勇军,贺拴海,宋一凡,等.基于锤击法的弯连续刚构模型桥动力试验[J].振动、测试与诊断,2007,27(3):212-215.ZHOU Yongjun,HE Shuanhai,SONG Yi-fan,et al.DynamicTest of Curved Continuous Rigid Frame Bridge Model UsingHammer Excitation Method[J].Journal of Vibration,Mea-surement&Diagnosis,2007,27(3):212-215.
[10]范立础.桥梁抗震[M].上海:同济大学出版社,1997.FAN Lichu.Earthquake Resistance of Bridge[M].Shanghai:Tongji University Press,1997.
[11]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2000.SONG Yifan.Dynamic Mechanics of Highway Bridge[M].Bei-jing:China Communications Press,2000.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心