钢管混凝土拱梁组合桥整体架设施工受力性能分析
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摘要
针对钢管混凝土拱梁组合桥在整体架设过程中,钢系梁稳定性差、混凝土系梁需配置较多预应力钢束的缺点,提出采用钢管劲性骨架系梁的整体架设施工方法。为研究钢管劲性骨架系梁在施工过程中对拱梁组合桥各主要构件的内力分配影响效果,以某公路下承式钢管混凝土拱梁组合桥为背景,采用MIDAS Civil和Abaqus软件分别建立实际桥梁的整体杆系有限元模型和拱脚结点实体有限元模型,对施工阶段各主要构件进行受力性能分析。结果表明:通过分批张拉钢管劲性骨架中的系杆,可以减小各施工阶段钢管劲性骨架的钢管应力;钢管劲性骨架可以有效分担施工过程中的拱肋应力,使拱肋和钢管劲性骨架受力均匀;拱脚结点以纵向受压为主;拱肋受力均匀,稳定计算满足要求;靠近拱脚的吊杆应力稍大于跨中的吊杆应力,吊杆应力满足要求。
In view of the defects that the stability of the steel tie beam is poor and lots of the prestressing strands have to be arranged for the concrete tie beam of the hybrid bridge of concrete-filled steel tube(CFST)arch and girder in the integral erection,the construction method for the integral erection using the steel tube stiffen skeleton tie beam was proposed.To study the influences of the stiffen skeleton tie beam on the internal force distribution of the main components of the hybrid bridge in the construction,a highway through hybrid bridge of the CFST arch and girder was cited as an example,the software MIDAS Civil and Abaqus was used to respectively set up the integral link finite element model and the arch spring joint solid finite element model for the actual bridge and the mechanical behavior of the different main components of the bridge at the construction stages was analyzed.The results of the analysis indicate that the tensioning of the tie members in the steel tube stiff skeleton in batches can reduce the steel tube stresses of the stiff skeleton at the construction stages.The stiff skeleton can effectively share the arch rib stress in the construction and make the forces in the arch rib and stiff skeleton balanced.Finally,the arch spring joints are mainly in the longitudinal compression.The force in the arch rib is balanced and the stability calculation can accord with the requirements.The stresses in the hangers close to the arch springs are slightly greater than those in the hangers at the midspan and the stresses in the hangers can accord with the requirements as well.
In view of the defects that the stability of the steel tie beam is poor and lots of the prestressing strands have to be arranged for the concrete tie beam of the hybrid bridge of concrete-filled steel tube(CFST)arch and girder in the integral erection,the construction method for the integral erection using the steel tube stiffen skeleton tie beam was proposed.To study the influences of the stiffen skeleton tie beam on the internal force distribution of the main components of the hybrid bridge in the construction,a highway through hybrid bridge of the CFST arch and girder was cited as an example,the software MIDAS Civil and Abaqus was used to respectively set up the integral link finite element model and the arch spring joint solid finite element model for the actual bridge and the mechanical behavior of the different main components of the bridge at the construction stages was analyzed.The results of the analysis indicate that the tensioning of the tie members in the steel tube stiff skeleton in batches can reduce the steel tube stresses of the stiff skeleton at the construction stages.The stiff skeleton can effectively share the arch rib stress in the construction and make the forces in the arch rib and stiff skeleton balanced.Finally,the arch spring joints are mainly in the longitudinal compression.The force in the arch rib is balanced and the stability calculation can accord with the requirements.The stresses in the hangers close to the arch springs are slightly greater than those in the hangers at the midspan and the stresses in the hangers can accord with the requirements as well.
引文
[1]陈宝春.钢管混凝土拱桥(第三版)[M].北京:人民交通出版社,2016.(CHEN Bao-chun.Concrete Filled Steel Tubular Arch Bridges(Third Edition)[M].Beijing:China Communications Press,2016.in Chinese)
[2]陈宝春,韦建刚,周俊,等.我国钢管混凝土拱桥应用现状与展望[J].土木工程学报,2017,50(6):50-61.(CHEN Bao-chun,WEI Jian-gang,ZHOU Jun,et al.Application of Concrete-Filled Steel Tube Arch Bridges in China:Current Status and Prospects[J].China Civil Engineering Journal,2017,50(6):50-61.in Chinese)
[3]刘本永.无支架施工的劲性骨架系杆钢管混凝土拱桥分析[J].交通科技,2017(3):76-78.(LIU Ben-yong.Analysis of Construction of ConcreteFilled Steel Tube Arch Bridges with Stiff Skelton Tie Members Not Using Scaffoldings[J].Transportation Science&Technology,2017(3):76-78.in Chinese)
[4]陈昀明,杨亚林,陈宝春.钢管混凝土拱梁组合桥桥型分析[J].公路,2006(12):38-41.(CHEN Yun-ming,YANG Ya-lin,CHEN Bao-chun.Analysis of Arch-Girder Combination Bridges with Concrete-Filled Steel Pipes[J].Highway,2006(12):38-41.in Chinese)
[5]邵旭东.桥梁工程(第四版)[M].北京:人民交通出版社,2016.(SHAO Xu-dong.Bridge Engineering(Fourth Edition)[M].Beijing:China Communications Press,2016.in Chinese)
[6]杨高平,张霆浩.下承式钢管混凝土系杆拱桥拱脚局部应力分析[J].南阳理工学院学报,2014,6(3):72-75.(YANG Gao-ping,ZHANG Ting-hao.Local Stress Analysis of Arch Spring of Through Tied Arch Bridge of Concrete-Fillied Steel Tubes[J].Journal of Nanyang Institute of Technology,2014,6(3):72-75.in Chinese)
[7]彭桂瀚,陈宝春,孙潮.下承式钢管混凝土刚架系杆拱桥拱脚有限元应力分析[J].福州大学学报(自然科学版),2007,35(1):85-88.(PENG Gui-han,CHEN Bao-chun,SUN Chao.FEM Stress Analysis of Arch Spring Joint of Through CFST Rigid Frame Tied Arch Bridge[J].Journal of Fuzhou University(Natural Science Edition),2007,35(1):85-88.in Chinese)
[8]GB 50923-2013,钢管混凝土拱桥技术规范[S].(GB 50923-2013,Technical Code for Concrete-Filled Steel Tube Arch Bridges[S].)
[9]傅金龙,黄天立.钢管混凝土拱桥吊杆张拉方案优化研究[J].桥梁建设,2016,46(4):67-72.(FU Jin-long,HUANG Tian-li.Optimization of Tensioning Scheme for Hangers of Concrete-Filled Steel Tube Arch Bridge[J].Bridge Construction,2016,46(4):67-72.in Chinese)
[10]韩保勤.钢管混凝土拱桥吊杆张拉方案比选[J].桥梁建设,2015,45(1):114-119.(HAN Bao-qin.Comparison and Selection of Tensioning Scheme for Hangers of Concrete-Filled Steel Tube Arch Bridge[J].Bridge Construction,2015,45(1):114-119.in Chinese)
[2]陈宝春,韦建刚,周俊,等.我国钢管混凝土拱桥应用现状与展望[J].土木工程学报,2017,50(6):50-61.(CHEN Bao-chun,WEI Jian-gang,ZHOU Jun,et al.Application of Concrete-Filled Steel Tube Arch Bridges in China:Current Status and Prospects[J].China Civil Engineering Journal,2017,50(6):50-61.in Chinese)
[3]刘本永.无支架施工的劲性骨架系杆钢管混凝土拱桥分析[J].交通科技,2017(3):76-78.(LIU Ben-yong.Analysis of Construction of ConcreteFilled Steel Tube Arch Bridges with Stiff Skelton Tie Members Not Using Scaffoldings[J].Transportation Science&Technology,2017(3):76-78.in Chinese)
[4]陈昀明,杨亚林,陈宝春.钢管混凝土拱梁组合桥桥型分析[J].公路,2006(12):38-41.(CHEN Yun-ming,YANG Ya-lin,CHEN Bao-chun.Analysis of Arch-Girder Combination Bridges with Concrete-Filled Steel Pipes[J].Highway,2006(12):38-41.in Chinese)
[5]邵旭东.桥梁工程(第四版)[M].北京:人民交通出版社,2016.(SHAO Xu-dong.Bridge Engineering(Fourth Edition)[M].Beijing:China Communications Press,2016.in Chinese)
[6]杨高平,张霆浩.下承式钢管混凝土系杆拱桥拱脚局部应力分析[J].南阳理工学院学报,2014,6(3):72-75.(YANG Gao-ping,ZHANG Ting-hao.Local Stress Analysis of Arch Spring of Through Tied Arch Bridge of Concrete-Fillied Steel Tubes[J].Journal of Nanyang Institute of Technology,2014,6(3):72-75.in Chinese)
[7]彭桂瀚,陈宝春,孙潮.下承式钢管混凝土刚架系杆拱桥拱脚有限元应力分析[J].福州大学学报(自然科学版),2007,35(1):85-88.(PENG Gui-han,CHEN Bao-chun,SUN Chao.FEM Stress Analysis of Arch Spring Joint of Through CFST Rigid Frame Tied Arch Bridge[J].Journal of Fuzhou University(Natural Science Edition),2007,35(1):85-88.in Chinese)
[8]GB 50923-2013,钢管混凝土拱桥技术规范[S].(GB 50923-2013,Technical Code for Concrete-Filled Steel Tube Arch Bridges[S].)
[9]傅金龙,黄天立.钢管混凝土拱桥吊杆张拉方案优化研究[J].桥梁建设,2016,46(4):67-72.(FU Jin-long,HUANG Tian-li.Optimization of Tensioning Scheme for Hangers of Concrete-Filled Steel Tube Arch Bridge[J].Bridge Construction,2016,46(4):67-72.in Chinese)
[10]韩保勤.钢管混凝土拱桥吊杆张拉方案比选[J].桥梁建设,2015,45(1):114-119.(HAN Bao-qin.Comparison and Selection of Tensioning Scheme for Hangers of Concrete-Filled Steel Tube Arch Bridge[J].Bridge Construction,2015,45(1):114-119.in Chinese)