刚构—连续组合梁桥施工线形控制的研究
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摘要
随着公路建设的发展,为满足地形条件的要求,刚构-连续组合梁桥的应用日趋广泛。刚构-连续组合梁桥一般墩身较高、跨径较大,结构复杂,而且施工过程中受多种因素的影响,使结构受力和变形更加复杂。线形控制是桥梁顺利合拢,成桥线形符合设计要求,以及结构的安全的必要保证。
本文依托窟野河特大桥施工,建立结构模型,进行施工过程模拟计算,根据仿真计算的结果和实际施工过程,确定大桥施工控制方案,对实际工程桥梁施工过程中的线形进行监测；并对支座墩、过渡墩支座的偏移量的设置进行了计算。到目前的施工过程,监控效果良好。
刚构—连续组合梁桥施工线形的影响因素众多,本文采用多扰动率方法,对刚构—连续组合梁桥设计参数敏感性进行了定量的分析；引入了桥梁设计参数敏感度的概念,给出了梁段不同位置对于刚构—连续组合梁桥设计参数的敏感度。
通过对多个设计参数的敏感性进行定量分析,得知在最大悬臂状态下,容重的敏感性最大,弹性模量的敏感性次之,环境的相对湿度、管道偏差系数,管道摩阻系数稍小；梁段不同位置,对于参数的敏感度也不同。温度参数对悬臂结构挠度有较大的影响,施工中应采取一定的措施加以回避或修正。合拢顺序对线形影响较大,一经确定的施工顺序,尽量不要做出改变,一旦发生修改,监控的有关计算数据必须重新计算。在成桥状态下,预应力损失、混凝土收缩徐变等参数对主梁挠度影响较大。大跨度连续刚构桥施工过程复杂,影响参数多,对其施工过程实施有效的施工控制是桥梁施工质量和桥梁施工安全的重要保证。
With the development of road building, rigid frame - continuous girder bridges become much more popular to meet the requirements of difficult terrain conditions. The regularity of stress and deformation changes of the structure is hard to achieve, because the Rigid Frame-continuous girder bridges are usually built with high piers, long girder by complicated method. And it is affected by a lot of parameters. Deformation control is a necessary program to make sure the bridge can be constructed correctly and safely.
Based on the actual project this paper did a lot of researches on deformation control. This article introduced the development of Rigid Frame-Continuous Girder Bridge and current researches on deformation control, and presented the bridge control theory and method of structural analysis.According to finite element theory, this paper built the finite element model of the actual project using the finite element analysis software Midas/Civil and did a lot of calculation.
Quantitative analysis results of many construction parameters under the largest cantilever state showed that Concrete density is the most sensitive parameter. The sensitivity of the elastic modulus ranked second. The relative humidity of the environment and two parameters of pre-stress loss are insensitive. Changes of temperature affect the deformation a lot. Certain measures should be taken to avoid the affection of temperature changes during construction. Construction order is important for the deformation of structure. It is avoided to change the order during construction. Data of deformation control must be recalculated if the order changed. Sensitivity analysis of many parameters are researched when the bridge is completed, it is known that loss of pre-stress force, concrete shrinkage and creep influence deflection of girder structure dramatically. These parameters must be controlled strictly. The construction process is very complex for long-span rigid frame- continuous bridge, and bridge status will be influenced by many parameters, So effective construction control is the assurance of quality and safety for the bridge.
Determine control Strategy of the actual bridge was made According to simulation results and the actual construction process.
This paper calculated the displacement of bearings, and made necessary adjustment.
本文依托窟野河特大桥施工,建立结构模型,进行施工过程模拟计算,根据仿真计算的结果和实际施工过程,确定大桥施工控制方案,对实际工程桥梁施工过程中的线形进行监测；并对支座墩、过渡墩支座的偏移量的设置进行了计算。到目前的施工过程,监控效果良好。
刚构—连续组合梁桥施工线形的影响因素众多,本文采用多扰动率方法,对刚构—连续组合梁桥设计参数敏感性进行了定量的分析；引入了桥梁设计参数敏感度的概念,给出了梁段不同位置对于刚构—连续组合梁桥设计参数的敏感度。
通过对多个设计参数的敏感性进行定量分析,得知在最大悬臂状态下,容重的敏感性最大,弹性模量的敏感性次之,环境的相对湿度、管道偏差系数,管道摩阻系数稍小；梁段不同位置,对于参数的敏感度也不同。温度参数对悬臂结构挠度有较大的影响,施工中应采取一定的措施加以回避或修正。合拢顺序对线形影响较大,一经确定的施工顺序,尽量不要做出改变,一旦发生修改,监控的有关计算数据必须重新计算。在成桥状态下,预应力损失、混凝土收缩徐变等参数对主梁挠度影响较大。大跨度连续刚构桥施工过程复杂,影响参数多,对其施工过程实施有效的施工控制是桥梁施工质量和桥梁施工安全的重要保证。
With the development of road building, rigid frame - continuous girder bridges become much more popular to meet the requirements of difficult terrain conditions. The regularity of stress and deformation changes of the structure is hard to achieve, because the Rigid Frame-continuous girder bridges are usually built with high piers, long girder by complicated method. And it is affected by a lot of parameters. Deformation control is a necessary program to make sure the bridge can be constructed correctly and safely.
Based on the actual project this paper did a lot of researches on deformation control. This article introduced the development of Rigid Frame-Continuous Girder Bridge and current researches on deformation control, and presented the bridge control theory and method of structural analysis.According to finite element theory, this paper built the finite element model of the actual project using the finite element analysis software Midas/Civil and did a lot of calculation.
Quantitative analysis results of many construction parameters under the largest cantilever state showed that Concrete density is the most sensitive parameter. The sensitivity of the elastic modulus ranked second. The relative humidity of the environment and two parameters of pre-stress loss are insensitive. Changes of temperature affect the deformation a lot. Certain measures should be taken to avoid the affection of temperature changes during construction. Construction order is important for the deformation of structure. It is avoided to change the order during construction. Data of deformation control must be recalculated if the order changed. Sensitivity analysis of many parameters are researched when the bridge is completed, it is known that loss of pre-stress force, concrete shrinkage and creep influence deflection of girder structure dramatically. These parameters must be controlled strictly. The construction process is very complex for long-span rigid frame- continuous bridge, and bridge status will be influenced by many parameters, So effective construction control is the assurance of quality and safety for the bridge.
Determine control Strategy of the actual bridge was made According to simulation results and the actual construction process.
This paper calculated the displacement of bearings, and made necessary adjustment.
引文
[1]朱聘儒.钢-混凝土组合梁设计原理[M].北京市：中国建筑工业出版社,2006.
[2]牛和恩.虎门大桥工程第1册工程建设·施工组织管理·施工监理[M].北京市：人民交通出版社,1998.
[3]马保林.高墩大跨连续刚构桥[M].北京市：人民交通出版社,2001.
[4]雷俊卿.桥梁悬臂施工与设计[M].北京市：人民交通出版社,2000.
[5]王文涛.刚构-连续组合梁桥[M].北京市：人民交通出版社,1995.
[6]徐君兰.大跨度桥梁施工控制[M].北京市：人民交通出版社,2000.
[7]葛耀君.分段施工桥梁分析与控制[M].北京市：人民交通出版社,2003.
[8]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.
[9]向中富.桥梁施工控制技术[M].北京市：人民交通出版社,2001.
[10]Mari Antonior, Valdes Manuel. Long—term behavior of continuous precast concrete girder bridge model[J]. Journal of Bridge Engineering,2000,5(1).
[11]Gaicedo J. M. Marulanda J. Thomson P. Dyke S. J. Monitoring of changes in structural health[J]. Proceedings of the American Control Conference,2001,1
[12]Maeda K, Otsuka A, Takano H. The design and construction of the Yokoha-ma Bay Bridge[A]. Tokyo: Elsevier Science Publishers,1991
[13]陈芮.刚构—连续组合梁桥变形分析及控制[M].西安市：长安大学出版社.2006.
[14]张云必.田螺特大桥施工控制及温度效应分析[D].北京交通大学北京交通大学,2009.
[15]陈倩.悬臂浇筑预应力混凝土连续桥梁的影响因素分析[D].合肥工业大学合肥工业大学,2009.
[16]岳仁辉.大跨度刚构连续梁桥悬臂施工仿真分析与控制的研究[D].北京交通大学北京交通大学,2008.
[16]H S Chiu. Long—Term Deflection Control in Cantilever Prestressed Concrete Bridges, Control Method[J]. Journal of Engineering Mechanics, ASCE,1996,122(6).
[17]张永水.大跨度预应力砼连续刚构桥施工误差调整的Kalman滤波法[J].重庆交通学院学报.2000,19(3).
[18]钱登朝.高墩大跨刚构—连续组合梁桥关键技术研究[M].两安市：长安大学出版社,2006.
[19]刘刚亮,王中文.虎门大桥辅航道270m连续刚构桥悬臂施工控制[J].桥梁建设.2001(5).
[20]邓聚龙.灰色系统理论教程[M].武汉市：华中理工大学出版社,1990.
[21]杨雷,张永水,高建.灰色系统理论在白果渡嘉陵江大桥施工控制中的应用[J].重庆交通学院学报.2006(5).
[22]程霄翔,韩晓林,缪长青,等.基于灰色理论悬臂施工中连续梁桥的应力预测与控制[J].世界桥梁.2009(4).
[23]黄浩良.连续刚构桥悬臂施工过程中混凝土徐变效应分析[D].武汉理工大学武汉理工大学,2009.
[24]肖汝诚.桥梁结构分析及程序系统[M].北京市：人民交通出版社,2002.
[25]李国平,史建伟.上海吴淞大桥结构状态施工控制技术[J].华东公路.1994(2).
[26]范立础主.预应力混凝土连续梁桥[M].北京市：人民交通出版社,1988.
[27]顾安邦,常英.重庆黄花园嘉陵江大桥施工控制[J].重庆交通学院学报.1999,18(4).
[28]方华兵,田启贤.大跨度预应力混凝土连续刚构桥主梁线形控制参数敏感性分析[J].桥梁建设.2006(2)：81-83.
[29]许震,张雪松,徐君兰.连续刚构跨中下挠的参数影响分析[J].重庆交通大学学报(自然科学版).2007(4)：9-13.
[30]靳东海,混凝土连续刚构桥悬臂施工及线形控制技术.公路交通科技(应用技术版),2011(1)：159-16.
[31]吴健.高墩大跨径连续刚构桥线形控制[D].长安大学,2005.
[32]黄雯.大跨曲线连续刚构桥施工中的线形控制[D].西安建筑科技大学,2006.
[33]侯艳红.大跨连续刚构桥施工阶段线形控制[D].长安大学,2010.
[34]丁晗.高墩大跨连续刚构桥施工监控中的标高及线形监测研究[D].长安大学,2010.
[35]舒鑫.大跨度预应力混凝土连续刚构桥线形控制研究[D].南京理工大学,2007.
[36]王韶翔.曲线连续刚构施工线形控制及空间仿真分析[D].长安大学,2008.
[37]刘云.预应力砼曲线连续刚构桥施工线形控制方法应用研究[D].重庆交通大学,2010.
[38]杨胜.高墩大跨连续刚构桥悬臂施工线形控制及应力监控研究[D].长沙理工大学, 2006.
[39]朱世峰.多跨连续刚构桥结构线形控制与合拢技术研究[D].重庆交通大学,2008.
[2]牛和恩.虎门大桥工程第1册工程建设·施工组织管理·施工监理[M].北京市：人民交通出版社,1998.
[3]马保林.高墩大跨连续刚构桥[M].北京市：人民交通出版社,2001.
[4]雷俊卿.桥梁悬臂施工与设计[M].北京市：人民交通出版社,2000.
[5]王文涛.刚构-连续组合梁桥[M].北京市：人民交通出版社,1995.
[6]徐君兰.大跨度桥梁施工控制[M].北京市：人民交通出版社,2000.
[7]葛耀君.分段施工桥梁分析与控制[M].北京市：人民交通出版社,2003.
[8]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.
[9]向中富.桥梁施工控制技术[M].北京市：人民交通出版社,2001.
[10]Mari Antonior, Valdes Manuel. Long—term behavior of continuous precast concrete girder bridge model[J]. Journal of Bridge Engineering,2000,5(1).
[11]Gaicedo J. M. Marulanda J. Thomson P. Dyke S. J. Monitoring of changes in structural health[J]. Proceedings of the American Control Conference,2001,1
[12]Maeda K, Otsuka A, Takano H. The design and construction of the Yokoha-ma Bay Bridge[A]. Tokyo: Elsevier Science Publishers,1991
[13]陈芮.刚构—连续组合梁桥变形分析及控制[M].西安市：长安大学出版社.2006.
[14]张云必.田螺特大桥施工控制及温度效应分析[D].北京交通大学北京交通大学,2009.
[15]陈倩.悬臂浇筑预应力混凝土连续桥梁的影响因素分析[D].合肥工业大学合肥工业大学,2009.
[16]岳仁辉.大跨度刚构连续梁桥悬臂施工仿真分析与控制的研究[D].北京交通大学北京交通大学,2008.
[16]H S Chiu. Long—Term Deflection Control in Cantilever Prestressed Concrete Bridges, Control Method[J]. Journal of Engineering Mechanics, ASCE,1996,122(6).
[17]张永水.大跨度预应力砼连续刚构桥施工误差调整的Kalman滤波法[J].重庆交通学院学报.2000,19(3).
[18]钱登朝.高墩大跨刚构—连续组合梁桥关键技术研究[M].两安市：长安大学出版社,2006.
[19]刘刚亮,王中文.虎门大桥辅航道270m连续刚构桥悬臂施工控制[J].桥梁建设.2001(5).
[20]邓聚龙.灰色系统理论教程[M].武汉市：华中理工大学出版社,1990.
[21]杨雷,张永水,高建.灰色系统理论在白果渡嘉陵江大桥施工控制中的应用[J].重庆交通学院学报.2006(5).
[22]程霄翔,韩晓林,缪长青,等.基于灰色理论悬臂施工中连续梁桥的应力预测与控制[J].世界桥梁.2009(4).
[23]黄浩良.连续刚构桥悬臂施工过程中混凝土徐变效应分析[D].武汉理工大学武汉理工大学,2009.
[24]肖汝诚.桥梁结构分析及程序系统[M].北京市：人民交通出版社,2002.
[25]李国平,史建伟.上海吴淞大桥结构状态施工控制技术[J].华东公路.1994(2).
[26]范立础主.预应力混凝土连续梁桥[M].北京市：人民交通出版社,1988.
[27]顾安邦,常英.重庆黄花园嘉陵江大桥施工控制[J].重庆交通学院学报.1999,18(4).
[28]方华兵,田启贤.大跨度预应力混凝土连续刚构桥主梁线形控制参数敏感性分析[J].桥梁建设.2006(2)：81-83.
[29]许震,张雪松,徐君兰.连续刚构跨中下挠的参数影响分析[J].重庆交通大学学报(自然科学版).2007(4)：9-13.
[30]靳东海,混凝土连续刚构桥悬臂施工及线形控制技术.公路交通科技(应用技术版),2011(1)：159-16.
[31]吴健.高墩大跨径连续刚构桥线形控制[D].长安大学,2005.
[32]黄雯.大跨曲线连续刚构桥施工中的线形控制[D].西安建筑科技大学,2006.
[33]侯艳红.大跨连续刚构桥施工阶段线形控制[D].长安大学,2010.
[34]丁晗.高墩大跨连续刚构桥施工监控中的标高及线形监测研究[D].长安大学,2010.
[35]舒鑫.大跨度预应力混凝土连续刚构桥线形控制研究[D].南京理工大学,2007.
[36]王韶翔.曲线连续刚构施工线形控制及空间仿真分析[D].长安大学,2008.
[37]刘云.预应力砼曲线连续刚构桥施工线形控制方法应用研究[D].重庆交通大学,2010.
[38]杨胜.高墩大跨连续刚构桥悬臂施工线形控制及应力监控研究[D].长沙理工大学, 2006.
[39]朱世峰.多跨连续刚构桥结构线形控制与合拢技术研究[D].重庆交通大学,2008.