高墩大跨T构桥结构参数分析
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摘要
基于铁摩辛柯能量法对高墩大跨T构桥进行静力分析,推导变截面高墩考虑稳定性要求时临界墩高和满足强度条件时最大墩高的计算公式,给出临界墩高和最大墩高与结构参数的关系曲线,研究内、外壁坡度变化对临界墩高和最大墩高的影响,并给出判别实际工程中的变截面压杆是大柔度压杆还是小柔度压杆的坡度界限值,以此为界判断是否需要对工程中的变截面承压杆件进行稳定校核。研究结果表明:本文方法简便、有效,对工程实际有一定的指导意义;该方法可推广至任意桥梁墩身自体施工阶段的设计,亦可用于连续刚构桥施工阶段的T构静定体系。
Based on S.P.Timoshenko energy method,static analysis of T-shape rigid frame bridge with high pier and long span was done.Mathematical formula of the critical height of the varying cross-section pier for stability and the maximum height of it for strength were derived.The related curves between the critical height and the maximum height and configuration parameters were given.The influences of gradient changes of the inside and outside wall of pier on the critical height and the maximum height were studied by programming.And limit gradients to distinguish between big flexible column and small one among engineering variable cross-section columns were given.It was used to judge if the engineering members subject to compression with variable cross-section need stability checking.The results show that the above method is easy and effective to guide engineering significantly.This method can be extended to piers design during self-construction of any bridge.It can be used for the T-shape statically determinate system of continuous rigid frame bridge during construction as well.
Based on S.P.Timoshenko energy method,static analysis of T-shape rigid frame bridge with high pier and long span was done.Mathematical formula of the critical height of the varying cross-section pier for stability and the maximum height of it for strength were derived.The related curves between the critical height and the maximum height and configuration parameters were given.The influences of gradient changes of the inside and outside wall of pier on the critical height and the maximum height were studied by programming.And limit gradients to distinguish between big flexible column and small one among engineering variable cross-section columns were given.It was used to judge if the engineering members subject to compression with variable cross-section need stability checking.The results show that the above method is easy and effective to guide engineering significantly.This method can be extended to piers design during self-construction of any bridge.It can be used for the T-shape statically determinate system of continuous rigid frame bridge during construction as well.
引文
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[11]梁智垚,李建中.桥梁高墩合理计算模型探讨[J].地震工程与工程振动,2007,27(2):91-98.LIANG Zhi-yao,LI Jian-zhong.Investigation on rational analytical model of tall bridge pier[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(2):91-98.
[12]欧丽,叶梅新,陈佳.高墩大跨T构桥临界墩高结构参数影响分析[J].中南大学学报:自然科学版,2008,39(3):615-622.OU Li,YE Mei-xin,CHEN Jia.Effect analysis of structural parameters of critical pier height on T-shape rigid frame bridge with high pier and long span[J].Journal of Central South University:Science and Technology,2008,39(3):615-622.
[13]TB 10415—2003.铁路桥涵工程施工质量验收标准[S].TB 10415—2003.Standard for constructional quality acceptance of railway bridge and culvert engineering[S].
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[15]吴游宇,吴卫国,文功启.高墩大跨T构桥动力特性有限元分析[J].武汉理工大学学报,2004,26(2):34-36.WU You-yu,WU Wei-guo,WEN Gong-qi.Finite Element Analysis about dynamic characteristics of the long span T-type rigid bridge with high pier[J].Journal of Wuhan University of Technology,2004,26(2):34-36.
[2]de Felice G.Assessment of the load-carrying capacity of multi-span masonry arch bridges using fiber beam elements[J].Engineering Structures,2009,31(8):1634-1647.
[3]Berg A C,Bank L C,Oliva M G,et al.Construction and cost analysis of an FRP reinforced concrete bridge deck[J].Construction and Building Materials,2006,20(8):515-526.
[4]Osama J M,Tahir B M.A concrete pier:Case history of failure and repair[J].Construction and Building Materials,2000,14(1):2506中南大学学报(自然科学版)第42卷7-16.
[5]Fam A,Son J K.Finite element modeling of hollow and concrete-filled fiber composite tubes in flexure:Optimization of partial filling and a design method for poles[J].Engineering Structures,2008,30(10):2667-2676.
[6]杨少军.高风压、高地震区大跨连续刚构高墩设计与分析[J].桥梁建设,2007(2):47-50.YANG Shao-jun.Design and analysis of high-rise piers of long span continuous rigid-frame bridges in strong wind pressure and active seismic region[J].Bridge Building,2007(2):47-50.
[7]王钧利,贺拴海.大跨径连续刚构桥主墩的合理刚度分析[J].武汉理工大学学报:交通科学与工程版,2006,30(4):603-606.WANG Jun-li,HE Shuan-hai.Analysis of rationality rigidity of piers for long-span continuous rigid frame bridge[J].Journal of Wuhan University of Technology:Transportation Science&Engineering,2006,30(4):603-606.
[8]夏志斌,潘有昌.结构稳定理论[M].北京:高等教育出版社,1989:69-75.XIA Zhi-bin,PAN You-chang.Theory of structural stability[M].Beijing:Higher Education Press,1989:69-75.
[9]Wang P H,Tang T Y,Zheng H N.Analysis of cable-stayed bridges during construction by cantilever methods[J].Computers&Structures,2004,82(4/5):329-346.
[10]宋胜录,王解军.高墩大跨连续刚构桥施工控制分析[J].中南公路工程,2007,32(3):46-49.SONG Sheng-lu,WANG Jie-jun.The analysis of construction control of the high pier-long span continual rigid frame bridge[J].Journal of Central South Highway Engineering,2007,32(3):46-49.
[11]梁智垚,李建中.桥梁高墩合理计算模型探讨[J].地震工程与工程振动,2007,27(2):91-98.LIANG Zhi-yao,LI Jian-zhong.Investigation on rational analytical model of tall bridge pier[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(2):91-98.
[12]欧丽,叶梅新,陈佳.高墩大跨T构桥临界墩高结构参数影响分析[J].中南大学学报:自然科学版,2008,39(3):615-622.OU Li,YE Mei-xin,CHEN Jia.Effect analysis of structural parameters of critical pier height on T-shape rigid frame bridge with high pier and long span[J].Journal of Central South University:Science and Technology,2008,39(3):615-622.
[13]TB 10415—2003.铁路桥涵工程施工质量验收标准[S].TB 10415—2003.Standard for constructional quality acceptance of railway bridge and culvert engineering[S].
[14]李存权.结构稳定和稳定内力[M].北京:人民交通出版社,2000:71.LI Cun-quan.Structural stability and stable internal forces[M].Beijing:People’s Traffic Press,2000:71.
[15]吴游宇,吴卫国,文功启.高墩大跨T构桥动力特性有限元分析[J].武汉理工大学学报,2004,26(2):34-36.WU You-yu,WU Wei-guo,WEN Gong-qi.Finite Element Analysis about dynamic characteristics of the long span T-type rigid bridge with high pier[J].Journal of Wuhan University of Technology,2004,26(2):34-36.
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