预应力混凝土连续刚构桥施工监控分析研究
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摘要
近年来,随着我国交通事业的迅速发展,桥梁建设能力不断提高,预应力混凝土连续刚构桥作为一种大跨度桥梁,以其造价低廉、行车舒适、养护方便、耐久性高等独特优势在桥梁领域越来越受到重视,并得到了广泛的应用。由于预应力混凝土桥的施工过程漫长而复杂,为了保证内力控制合理、合龙精度符合要求以及成桥线形与设计线形相吻合,必须在桥梁施工阶段进行施工监控工作。
本文概述了预应力混凝土连续刚构桥的结构和力学优点及对其监控的意义和发展概况,详细阐述了施工监控的内容、控制方法、影响因素、施工控制系统的组成、施工过程的模拟分析方法以及施工控制校核验算的必要性,并以巴中回风大桥这一工程项目为背景,结合实际情况(工程概况、结构及施工特点等),论述了监控方案(包括施工控制目的,现场测试量,线形、应力、基础沉降及主梁温度场的实时测量)的设计,及时记录了监控成果,并进行了详细分析,最后讨论了对结构影响较大的混凝土徐变系数的取值。
在上述过程中,本文借助大型有限元分析软件Midas/Civil2010对实桥进行了仿真数值模拟,介绍了施工阶段分析控制、特征值分析控制及PSC设计的步骤,做了参数敏感性分析。并利用灰色理论对线形误差进行科学有效地预测,进而指导施工。
In recent years, with the rapid development of our traffic and the increasing capacity of the bridge construction, the prestressed concrete continuous rigid frame bridge,which is the long-span bridge,has received more and more attention and a wide range of applications in bridges field as result of its unique advantages of low cost, comfortable driving conditions, convenient maintenance and high durability. The prestressed concrete bridge construction process is long and complex, in order to ensure the reasonable control of the internal forces, the precision of the closure and the consistency between the bridge line shape and the design line shape, construction monitoring work must be carried out in the bridge construction stage.
This paper provides an overview of the prestressed concrete continuous rigid frame bridge structure, mechanical advantages, significance of its monitoring and development overview.Then, it elaborates the contents of construction control, control methods, influencing factors, the composition of construction control system, the way of simulating and analyzing construction process and the necessity of the construction control checking in detail. Through the project of Bazhong Hui Feng Bridge and its actual situation (project overview, structural and construction features), this paper discourses the design of the monitoring program (including construction control system, field testing, and measurements of the line shape, stress, settlement of foundation and temperature field of main beams in real time), timely recording of monitoring results and analysis. Finally,the paper discusses the value of the concrete creep coefficient which greatly influences structures.
In the above process, with the help of large finite element software Midas/Civil2010, this paper simulates the actual bridge, introduces the steps of analysis of the construction phase, eigenvalue analysis and the PSC design and analyzes the sensitivity of the parameters. It also scientifically and effectively forecasts the errors of the line shape,and then guide the construction through the grey theory.
本文概述了预应力混凝土连续刚构桥的结构和力学优点及对其监控的意义和发展概况,详细阐述了施工监控的内容、控制方法、影响因素、施工控制系统的组成、施工过程的模拟分析方法以及施工控制校核验算的必要性,并以巴中回风大桥这一工程项目为背景,结合实际情况(工程概况、结构及施工特点等),论述了监控方案(包括施工控制目的,现场测试量,线形、应力、基础沉降及主梁温度场的实时测量)的设计,及时记录了监控成果,并进行了详细分析,最后讨论了对结构影响较大的混凝土徐变系数的取值。
在上述过程中,本文借助大型有限元分析软件Midas/Civil2010对实桥进行了仿真数值模拟,介绍了施工阶段分析控制、特征值分析控制及PSC设计的步骤,做了参数敏感性分析。并利用灰色理论对线形误差进行科学有效地预测,进而指导施工。
In recent years, with the rapid development of our traffic and the increasing capacity of the bridge construction, the prestressed concrete continuous rigid frame bridge,which is the long-span bridge,has received more and more attention and a wide range of applications in bridges field as result of its unique advantages of low cost, comfortable driving conditions, convenient maintenance and high durability. The prestressed concrete bridge construction process is long and complex, in order to ensure the reasonable control of the internal forces, the precision of the closure and the consistency between the bridge line shape and the design line shape, construction monitoring work must be carried out in the bridge construction stage.
This paper provides an overview of the prestressed concrete continuous rigid frame bridge structure, mechanical advantages, significance of its monitoring and development overview.Then, it elaborates the contents of construction control, control methods, influencing factors, the composition of construction control system, the way of simulating and analyzing construction process and the necessity of the construction control checking in detail. Through the project of Bazhong Hui Feng Bridge and its actual situation (project overview, structural and construction features), this paper discourses the design of the monitoring program (including construction control system, field testing, and measurements of the line shape, stress, settlement of foundation and temperature field of main beams in real time), timely recording of monitoring results and analysis. Finally,the paper discusses the value of the concrete creep coefficient which greatly influences structures.
In the above process, with the help of large finite element software Midas/Civil2010, this paper simulates the actual bridge, introduces the steps of analysis of the construction phase, eigenvalue analysis and the PSC design and analyzes the sensitivity of the parameters. It also scientifically and effectively forecasts the errors of the line shape,and then guide the construction through the grey theory.
引文
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[2]周军生,楼庄鸿.国内外大跨径预应力混凝土连续刚构桥的现状和发展趋势[A].中国公路学会桥梁和结构工程学会一九九九年桥梁学术讨论会,1999
[3]谢伟东.连续刚构桥施工监控技术应用与研究[D].上海交通大学硕士研究生学位文,2007
[4]范立础.预应力混凝土连续梁桥[M].北京市：人民交通出版社,1988
[5]刘作霖.预应力T型刚构式桥[M].北京市：人民交通出版社,1982
[6]王文涛.刚构一连续组合梁桥[M].北京市：人民交通出版社,1997
[7]黄岗.高墩大跨度预应力混凝土连续刚构桥梁施工线形控制技术研究[D].中南大学硕士研究生学位论文,2011
[8]王朋.高墩大跨PC曲线连续刚构桥施工监控技术研究[D].武汉理工大学硕士研究生学位论文,2011
[9]Nawy EG. Prestressed concrete[M]. Prentice Hall,1989
[10]李国平,刘健.大跨连续梁桥线形最优施工控制的理论方法[J].华东公路,1992,第2期
[11]朱芳芳.连续刚构施工中的结构分析及其控制[D].大连理工大学硕士研究生学位论文,2003
[12]周瑞高.大跨度连续刚构桥梁施工监控及误差分析[D].山东大学硕士研究生学位论文,2011
[13]孙文晋.高墩大跨连续刚构桥施工监控和稳定性研究[D].武汉理工大学硕士研究生学位论文,2011
[14]向中富.桥梁施工控制技术[M].北京市：人民交通出版社,2001
[15]雷俊卿.桥梁悬臂施工与设计[M].北京市：人民交通出版社,2000
[16]范立础.桥梁工程[M].北京市：人民交通出版社,2000
[17]王金峰,刘斌.高墩大跨度连续刚构桥结构特点及施工控制[J].中国港湾建设,2005,第3期
[18]刘毅.大跨度连续刚构--涪江三桥主桥施工控制技术[D].西南交通大学硕士研究生学位论文,2006
[19]顾安邦,张永水.桥梁施工监测与控制[M].北京市：机械工业出版社,2005
[20]张海萌.桥梁施工控制方法浅析[J].黑龙江交通科技,2011,第2期
[21]盖圣巍.浅析桥梁施工控制方法[J].城市建设理论研究,2012,第2期
[22]陈金旭,苏豪乐.桥梁施工控制方法探讨[J].科技向导,2012,第2期
[23]徐君兰,项海帆.大跨度桥梁施工控制[M].北京市：人民交通出版社,2000
[24]Xing-Hua Zhao and W.F. Chen. Effective elastic moduli of concrete with interface layer [J]. Computers and Structures, Volume 66, Issues 2-3, January 1998,pp. 275-288
[25]K.M. Lee and JH. Park. A numerical model for elastic modulus of concrete considering interfacial transition zone[J]. Cement and Concrete Research, Volume 38, Issue 3, March 2008, pp.396-402
[26]陈芸.浅析预应力的作用[J].大陆桥视野,2011,第8期
[27]徐光华.浅析预应力损失原因及减少损失措施[J].混凝土,2012,第9期
[28]Hai-Jun Wu, Hao Zhang and Ping Lu. Brief Analysis of Temperature Effect on the Low Pier Continuous Rigid-frame Bridge [J]. Advanced materials Research, V255-260, May 2011, pp.911-915
[29]谭登祥,张志奇,李华刚.连续刚构桥施工节段混凝土温度裂缝分析[A].2009土木建筑教育改革理论与实践研讨会,2009,第11期
[30]王蕾,赵雪峰,欧进萍.东营黄河刚构—连续梁桥长期监测的温度分布规律分析[A].中国工程院土木工与可持续发展高层论坛,2010,第30卷增刊
[31]张坤,段忠东,刘洋.连续刚构桥动力特性参数识别与有限元模型修正[J].公路交通科技.2008,第9期
[32]王解军.车辆荷载作用下大跨桥梁的随机振动[J].中南公路工程,2003,第4期
[33]刘毅,李爱群,丁幼亮.大跨悬索桥面向结构健康监测的基准有限元模型[J].公路交通科技,2007,第8期
[34]M.Dolenc. Developing extendible component-oriented finite element software [J] Advances in Engineering Software, Volume 35, Issues 10-11, October-November 2004,pp.703-714
[35]宗周红,高铭霖,夏樟华.基于健康监测的连续刚构桥有限元模型确认：基于响应面法的有限元模型修正[J].土木工程学报,2011,第2期
[36]杨小兵.混凝土收缩徐变右侧模型研究[D].武汉大学硕士研究生学位论文,2004
[37]M. Mazloom. Estimating long-term creep and shrinkage of high-strength concrete [J]. Cement and Concrete Composites, Volume 30, Issue 4, April 2008,pp.316-326
[38]管延武.白河大桥高强混凝土收缩徐变试验研究[D].重庆交通大学硕士研究生学位论文,2007
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