大型斜拉桥施工过程中上塔柱整体临时存放后的主梁变形控制
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摘要
目的研究大型斜拉桥上塔柱整体竖转施工过程中临时存放阶段主梁挠度变化,为此类大型桥梁施工过程进行有效控制提供借鉴.方法结合在建的港珠澳大桥实际工程,对斜拉桥上塔柱整体吊装至主梁后并临时存放于主梁上部时整体结构的力学行为进行研究.一方面,考虑滑移效应,采用改进的折减刚度法对组合梁跨中挠度进行计算;另外,采用Midas有限元软件,根据设计要求,建立三维有限元模型对主梁挠度进行计算,并与现场监控的实测数据进行对比.结果上塔柱临时存放于主梁后,主梁实测下挠值与理论下挠值接近,挠度变化较小;单幅梁直腹板与斜腹板下挠值接近,左右幅梁挠度变化较为对称,主梁下挠状态相对稳定;上塔柱竖转完成后,主梁挠度基本恢复.结论上塔柱在主梁上临时存放的方案安全可行,对主梁下挠影响较小,满足设计及施工要求.
According to the process of installing pylon during the construction of large-scale cablestayed bridges and combining with the practical engineering of Hong kong-Zhuhai-Macao bridge,mechanical behavior of structure is analyzed when the upper pylon of the cable-stayed bridge is hoisted and installed on the girder for understanding the change of the deflection of the girder during the process and supplying experiences for controlling the construction of similar large-scale bridges. On the one hand,considering slip effect the deflection of mid-span of composite beams is calculated by the modified reduced stiffness method during the stage of laying upper pylon. On the other hand,spacial finite element model is established based on finite element software MIDAS for analyzing the deflection of the composite beam during the stage according to design requirements,whose results are compared with the measured one in the field. The results show that the difference between measured value and theoretical value and the change of the deflection are small,and the deflections of vertical web and inclined web of a single girder are similar,the girder keeps steady during the stage of laying upper pylon and returns after installing the pylon,which indicates that the method of laying upper pylon on the girder is safe and the influence on the deflection of the girder is small,then the design and construction requirements are satisfied.
According to the process of installing pylon during the construction of large-scale cablestayed bridges and combining with the practical engineering of Hong kong-Zhuhai-Macao bridge,mechanical behavior of structure is analyzed when the upper pylon of the cable-stayed bridge is hoisted and installed on the girder for understanding the change of the deflection of the girder during the process and supplying experiences for controlling the construction of similar large-scale bridges. On the one hand,considering slip effect the deflection of mid-span of composite beams is calculated by the modified reduced stiffness method during the stage of laying upper pylon. On the other hand,spacial finite element model is established based on finite element software MIDAS for analyzing the deflection of the composite beam during the stage according to design requirements,whose results are compared with the measured one in the field. The results show that the difference between measured value and theoretical value and the change of the deflection are small,and the deflections of vertical web and inclined web of a single girder are similar,the girder keeps steady during the stage of laying upper pylon and returns after installing the pylon,which indicates that the method of laying upper pylon on the girder is safe and the influence on the deflection of the girder is small,then the design and construction requirements are satisfied.
引文
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[17]徐荣桥,陈德权.组合梁挠度计算的改进折减刚度法[J].工程力学,2013(2):285-291.(XU Rongqiao,CHEN Dequan.Modified reduced stiffness method for calculating the deflection of composite beams[J].Engineering mechanics,2013(2):285-291.)
[18]付果.考虑界面滑移及掀起影响的钢-混凝土组合梁试验与理论研究[D].西安:西安建筑科技大学,2008.(FU Guo.Experiments and theoretical research on steel-concrete composite beams considering interface slipand uplift[D].Xi'an:Xi'an University of Architecture and Technology,2008.)
[19]邵永健,朱聘儒,陈忠汉,等.钢-混凝土组合梁挠度计算的修正换算截面法[J].建筑结构学报,2008,29(2):99-103.(SHAO Yongjian,ZHU Pinru,CHEN Zhonghan,et al.Modified transformed-section method of deflection calculation of steel-concrete composite beams[J].Journal of building structures,2008,29(2):99-103.)
[20]姜绍飞,王鹏,吴兆旗.钢-混凝土组合梁疲劳性能的有限元分析[J].沈阳建筑大学学报(自然科学版),2009,25(1):111-115.(JIANG Shaofei,WANG Peng,WU Zhaoqi.Finite element analysis on fatigue behavior of steel-concrete composite beams[J].Journal of Shenyang jianzhu university(natural science),2009,25(1):111-115.)
[21]GIRHAMMAR U A.A simplified analysis method for composite beams with interlayer slip[J].International journal of mechanical sciences,2009,51(7):515-530.
[2]陈平,黄腾.南京三桥主桥钢塔空间位置监测研究[J].公路工程,2012,6:208-213.(CHEN Ping,HUANG Teng.The steel tower space position monitoring research of Nanjing No.3 yangtze river bridge[J].Highway engineering,2012,6:208-213.)
[3]黄腾,李桂华,陈建华,等.特大型斜拉桥钢塔柱架设精密测控技术[J].工程勘察,2008,12:44-48,52.(HUANG Teng,LI Guihua,CHEN Jianfeng,et al.Precise surveying controlling technology for erecting steel pylons of oversized cable stayed bridge[J].Geotechnical investigation&surveying,2008,12:44-48,52.)
[4]戴书学.泰州长江公路大桥钢塔柱吊装施工[J].中国港湾建设,2011(2):51-54.(DAI Shuxue.Hoisting construction for steel pillar of Taizhou Yangtze river highway bridge[J].China harbour engineering,2011(2):51-54.)
[5]YOU Jilin.Construction and alignment control of the middle steel pylon of Taizhou bridge[J].Engineering sciences,2011,9(2):46-50
[6]ZHANG Guoxing.Introduction to steel pylon hoisting of Taizhou Yangtze bridge[J].Engineering sciences,2011,9(2):39-45
[7]张润文.斜拉桥梭形钢塔柱安装施工技术研究[J].铁道技术监督,2010(6):48-51.(ZHANG Runwen.Research on the installation technology of the spindle-shaped steel tower column on the cable stayed bridge[J].Railway quality control,2010(6):48-51.)
[8]蒋本俊,刘生奇.武汉二七长江大桥主桥桥塔施工关键技术[J].桥梁建设,2012(3):7-13.(JIANG Benjun,LIU Shengqi.Key techniques for construction of pylon of main bridge of Wuhan Erqi Changjiang river bridge[J].Bridge construction,2012(3):7-13.)
[9]尹振君,阮中革,陈宁贤.黄冈公铁两用长江大桥桥塔施工技术[J].世界桥梁,2013(6):20-23.(YIN Zhenjun,RUAN Zhongge,CHEN Ningxian.Construction technique for pylons of Huanggang Changjiang river rail-cum-road bridge[J].World bridges,2013(6):20-23.)
[10]GAO Y W.Study on the construction process management and control of cable stayed bridge based on MIDAS[J].International conference on e-health networking,digital ecosystems&technologies,2010,1:440-442.
[11]ROLLAND A,THYLEFORS B.Construction and geometry control of incheon cable-stayed bridge[J].Structural engineering international,2012,22(1):49-52.
[12]GOODYEAR D,SALAMIE R.Construction of the clark cable-stayed bridge at alton,illinois[J].Structures congress XII,ASCE,2015,22:672-676.
[13]HALFAWY M R.Municipal information models and federated software architecture for implementing integrated infrastructure management environments[J].Automation in construction,2010(19):433–446.
[14]DANIEL R A.Preliminary design of four optional long bridge solutions for the western scheldt crossing,Netherlands[J].Iabse symposium report,2013(34):1-8.
[15]中国工程建设标准化协会.钢结构设计规范:GB 50017—2003[S].北京:中国建筑工业出版社,2003.(China Association for Engineering Construction Standardization.Code for Design of Steel Structures:GB 50017-2003[S].Beijing:China Architecture&Building Presss,2003.)
[16]LIU Xiaogang,FAN Jiansheng,NIE Jianguo,Behavior of composite rigid frame bridge under bidirectional seismic excitations[J].Journal of traffic and transportation engineering:english edition,2014,1(1):62-71.
[17]徐荣桥,陈德权.组合梁挠度计算的改进折减刚度法[J].工程力学,2013(2):285-291.(XU Rongqiao,CHEN Dequan.Modified reduced stiffness method for calculating the deflection of composite beams[J].Engineering mechanics,2013(2):285-291.)
[18]付果.考虑界面滑移及掀起影响的钢-混凝土组合梁试验与理论研究[D].西安:西安建筑科技大学,2008.(FU Guo.Experiments and theoretical research on steel-concrete composite beams considering interface slipand uplift[D].Xi'an:Xi'an University of Architecture and Technology,2008.)
[19]邵永健,朱聘儒,陈忠汉,等.钢-混凝土组合梁挠度计算的修正换算截面法[J].建筑结构学报,2008,29(2):99-103.(SHAO Yongjian,ZHU Pinru,CHEN Zhonghan,et al.Modified transformed-section method of deflection calculation of steel-concrete composite beams[J].Journal of building structures,2008,29(2):99-103.)
[20]姜绍飞,王鹏,吴兆旗.钢-混凝土组合梁疲劳性能的有限元分析[J].沈阳建筑大学学报(自然科学版),2009,25(1):111-115.(JIANG Shaofei,WANG Peng,WU Zhaoqi.Finite element analysis on fatigue behavior of steel-concrete composite beams[J].Journal of Shenyang jianzhu university(natural science),2009,25(1):111-115.)
[21]GIRHAMMAR U A.A simplified analysis method for composite beams with interlayer slip[J].International journal of mechanical sciences,2009,51(7):515-530.