混凝土斜连续梁桥顶推仿真计算及关键临时构件力学性能分析
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摘要
顶推法多应用于预应力钢筋混凝土等截面连续梁桥和斜拉桥梁的施工。本文以营盘东路浏阳河大桥为研究对象,建立了混凝土斜连续梁桥顶推施工全过程仿真模型,分析了顶推过程中主梁和关键临时结构的受力特点,得出了一些有益的结论,为大桥顺利安全的顶推到位提供了参考,具有重要的理论意义和工程应用价值,具体研究内容如下:
1、根据斜连续梁顶推施工过程的特点,建立了顶推全过程仿真模型,其关键截面应力理论值与实测值吻合较好,验证了模型的可靠性。在此基础上,得出了主梁内力、应力和支墩反力等变量在顶推过程中的变化规律,同时优化了滑道支撑墩设置的间距,由此,提出了最优临时拉索索力的控制措施,并且在顶推施工中应用,得到了满意的效果。
2、在截面形式、配筋情况、顶推施工过程保持不变的前提下,研究了斜连续梁桥中最为重要的参数——斜度φ对顶推施工的影响,得到了斜度对顶推过程中主梁受力的影响程度及其影响规律,确切地掌握了结构的真实受力情况,并且在施工中采取了相应的措施,保证了大桥施工能够顺利安全地进行。
3、预制平台是顶推施工关键临时构件之一,通过分析预制平台各构件的力学性能,得到了滑道支撑墩布置的最优间距,从理论上解决了顶推施工中临时墩最优位置设置的问题,同时着重讨论了竖直角累积误差和扭转角累积误差产生的原因以及梁体二次内力大小的计算方法和防治措施,具有一定的理论意义和工程实践指导意义。
4、钢结构临时墩也是顶推过程中的关键临时构件,为保证临时墩设置的合理性和在顶推过程中的安全性,根据浏阳河大桥的受力特点,主要研究了临时墩拉索索力值的调控方法,这一方法能很好的运用于工程实践,具有很强的实用性,同时,还分析了临时墩沉降对主梁内力造成的影响。
The incremental launching method is widely Used in prestresse concrete continuous beam bridge with uniform section and cable stayed bridge construction.This thesis is based on the research object of bridge liuyanghe Yingpandonglu,and which is about to do some calculation and monitoring work of construction control for the key construction phase of incremental launching method and to research the dynamic emulate analysis method andthe key technology of the incremental launching method of the prestressconcrete continuous beam bridge.And found the way to determind the bestposition of the temporary pier.The highlight of the thesis are as followed:
(1) Based on the process characteristics of finite element method,Establish finite element model, The key section stress theoretical values agree well with the measured data and the reliability of the model is verified. On the basis of this ,obtaian the Change rule Of internal forces,stress and buttress reaction in the incremental launching,At the same time, Optimize the slide set spacing support piers.Thus, the optimal temporary cable force control measures.And used in the incremental launching ,Satisfactory results have been obtained.
(2)On the premise of the Cross-sectional form,reinforcement situation,Incremental Launching Construction remains the same, research the most important parameters of the girder bridge——the influence of slope in the incremental launching . Get the gradient in the process of incremental launching the influence degree of the girder and the influence . Exactly grasp the exact structure of the real structure stress. And take preventive measures in the construction of the response, Ensure the bridge construction to be able smoothly and securely .
(3)Prefabricated platform is pushing in the construction of key temporary components, through the analysis of the key component of the precast platform of force performance, study the new and old beam section juncture place corner to cause a secondary girder structure internal force influence, analyzes the slide support the stress of the pier, and support piers of the slide decorate the optimal spacing.
(4)Temporary pier in steel structure analyzing the force, ensure the rationality and set up temporary pier in pushing the safety in the process are analyzed, and temporary pier subsidence caused by internal force influence of main girder.
1、根据斜连续梁顶推施工过程的特点,建立了顶推全过程仿真模型,其关键截面应力理论值与实测值吻合较好,验证了模型的可靠性。在此基础上,得出了主梁内力、应力和支墩反力等变量在顶推过程中的变化规律,同时优化了滑道支撑墩设置的间距,由此,提出了最优临时拉索索力的控制措施,并且在顶推施工中应用,得到了满意的效果。
2、在截面形式、配筋情况、顶推施工过程保持不变的前提下,研究了斜连续梁桥中最为重要的参数——斜度φ对顶推施工的影响,得到了斜度对顶推过程中主梁受力的影响程度及其影响规律,确切地掌握了结构的真实受力情况,并且在施工中采取了相应的措施,保证了大桥施工能够顺利安全地进行。
3、预制平台是顶推施工关键临时构件之一,通过分析预制平台各构件的力学性能,得到了滑道支撑墩布置的最优间距,从理论上解决了顶推施工中临时墩最优位置设置的问题,同时着重讨论了竖直角累积误差和扭转角累积误差产生的原因以及梁体二次内力大小的计算方法和防治措施,具有一定的理论意义和工程实践指导意义。
4、钢结构临时墩也是顶推过程中的关键临时构件,为保证临时墩设置的合理性和在顶推过程中的安全性,根据浏阳河大桥的受力特点,主要研究了临时墩拉索索力值的调控方法,这一方法能很好的运用于工程实践,具有很强的实用性,同时,还分析了临时墩沉降对主梁内力造成的影响。
The incremental launching method is widely Used in prestresse concrete continuous beam bridge with uniform section and cable stayed bridge construction.This thesis is based on the research object of bridge liuyanghe Yingpandonglu,and which is about to do some calculation and monitoring work of construction control for the key construction phase of incremental launching method and to research the dynamic emulate analysis method andthe key technology of the incremental launching method of the prestressconcrete continuous beam bridge.And found the way to determind the bestposition of the temporary pier.The highlight of the thesis are as followed:
(1) Based on the process characteristics of finite element method,Establish finite element model, The key section stress theoretical values agree well with the measured data and the reliability of the model is verified. On the basis of this ,obtaian the Change rule Of internal forces,stress and buttress reaction in the incremental launching,At the same time, Optimize the slide set spacing support piers.Thus, the optimal temporary cable force control measures.And used in the incremental launching ,Satisfactory results have been obtained.
(2)On the premise of the Cross-sectional form,reinforcement situation,Incremental Launching Construction remains the same, research the most important parameters of the girder bridge——the influence of slope in the incremental launching . Get the gradient in the process of incremental launching the influence degree of the girder and the influence . Exactly grasp the exact structure of the real structure stress. And take preventive measures in the construction of the response, Ensure the bridge construction to be able smoothly and securely .
(3)Prefabricated platform is pushing in the construction of key temporary components, through the analysis of the key component of the precast platform of force performance, study the new and old beam section juncture place corner to cause a secondary girder structure internal force influence, analyzes the slide support the stress of the pier, and support piers of the slide decorate the optimal spacing.
(4)Temporary pier in steel structure analyzing the force, ensure the rationality and set up temporary pier in pushing the safety in the process are analyzed, and temporary pier subsidence caused by internal force influence of main girder.
引文
[1]范立础,《桥梁工程》上册,人民交通出版社,1987年,P34-68
[2]《预应力混凝土施工应用手册》,中国土木工程学会,混凝土及预应力混凝土学会,工程实践委员会,中国铁道出版社,1994年,P22-45
[3]方明山,20世纪桥梁工程发展历程回顾及展望,桥梁建设,1999第1期,P58- 60
[4]徐君兰,项海帆,大跨度桥梁旌工控制,人民交通出版社,2000年
[5]杨沪湘,陈湘林,预应力连续梁顶推技术的成熟,公路与汽运,2001年3月第3期,P10-13
[6]汤俊生,PC梁顶推技术的回顾与展望,桥梁建设,1996年第1期,P11-14
[7] Skeet,James A.,Lester,W.B.,McClary,Calvin T.,Incremental launch:The Stoney Trail bridge,Concrete International,February 2006,04,P53-57
[8]上官兴,连续梁桥顶推新构思,东北公路,1994,04,P71-82
[9]上官兴,郭圣栋,周湘政,中国桥梁顶推技术新发展,第十三届海峡两岸都市交通学术研讨会都市区及区域交通现代化,2005年,P33-67
[10]陈湘林,《九孔50m预应力连续箱梁顶推法施工》,湖南交通科技,1994年12月,增刊
[11]薛江伟赵辉,叶李,《竹埠港湘江大桥多点顶推法的施工》,公路,2003年1月,第三期
[12]杨昀,《用顶推法修建大跨度连续梁桥(丘墩大桥设计简介) [J]》,华东情报网,1988年
[13]秦占海,《浅谈某大桥主桥连续箱梁顶推施工技术[J]》,广东建材,2008,01
[14]粟忠民,何大河,龚平,《多点柔性墩连续顶推技术在梁桥中的应用》,湖城建高等专科学校学报,2002,02,P17-18
[15]叶见曙,黄平明.连续斜支承梁的计算模式及受载特性分析.土木工程学报,NO.2,l997
[16]姚玲森编译,《单跨斜支承梁的内力影响线》,国外公路,No.1.1988
[17]邵容光,《斜交板的平面内位移计算》.华东公路,No.5,1988
[18]颜东煌,田伸初,李学文.桥梁结果电算程序设计》.湖南大学出版社,1999
[19]钟启宾,我国连续项推技术的最新发展概况》.桥梁建设,1994,(2),P 46-48
[20]盛兴旺,预应力混凝土斜交箱形梁分析理论与试验研究》,中南大学,2000年
[21]颜全胜,王卫锋,邹小江,《顶推法施工过程仿真分析软件的研制》.世界桥粱,N0.3.2003
[22]田仲初,张华平,《顶推施工中导梁的合理配置》,世界桥梁,2005.04
[23]刘晓霞,邱琼海,张建红,郑机.《东海大桥8150m顶推箱梁施工技术》,世界桥梁.2004增刊
[24]黄平明,《连续斜箱梁桥的统一计算模式》.中国公路学报,NO.2,1999
[25]张晓东,《桥梁顶推施正技术》,公路,2003年9月第9期
[26]徐化轩,《顶推梁桥旌工中可能出现的技术问题及对策》,铁道工程学报,2002年第2期
[27]田启军,陈湘林,《顶推施工中导梁的应用与锚固措施的优化》,中外公路,2003年第6期
[28]崔科宇,《多点曲线连续顶推施工技术[D]》西南交通大学工程硕士论文, 2003年
[29]张华平,《混凝土斜连续梁桥顶推施工控制技术研究[D]》.,长沙理工大学硕士论文, 2005-4
[30]黄平明,《混凝土斜梁桥》,人民交通出版社, 2000-8.
[31] Rosignoli M,Influences of the incremental launching construction method on the sizing of prestressed concrete bridge decks,Proceedings of the Institution of Civil Engineers,Structuces and Buildings,1997,1 22,316-325
[32] Rosignoli M,Solution of the contimuous beam in launched bridges,Proceedings of the Institution of Civil Engineers,Structures and Buildings,1997,122,390-398
[33] N J Beaney,J M.Martin,Design and construction of the Dornoch Firth Bridge,construction Proceedings of Institution Civil Engineerings,Transportation, 1993,100,Aug,145-156
[34] James.A Skeet,W B Lester,and Calvin T McClar,Incremental Launch The Stoney Trail Bridge,Concrete International,Feb 1 998
[35] F.N Rowlcy,Incremental launch bridges,UK practice and sortie foreign comparisons,Institution of structural Engineers,May,1998
[36] Wilhelm Zellner,Incremental Launching of Structures,ASCE International Convention and Exibition,May,1998
[37]崔科宇.,《多点曲线连续顶推施工技术(西南交通大学工程硕士论文)》,2003年
[38]郭忠,《大坡度斜交不对称PC箱形连续梁的节段拼装和顶推架设.铁道建筑技术》,No.2,1996年
[39]赵志平,《桥梁顶推施工的精度探讨》,桥梁建设,No.2,1994年
[40]范立础。《桥梁工程》.北京:人民交通出版社,2001年
[41]高以利,凌国石,《斜交箱梁顶推法架设施工技术》,建筑施工,No.3,2003年
[2]《预应力混凝土施工应用手册》,中国土木工程学会,混凝土及预应力混凝土学会,工程实践委员会,中国铁道出版社,1994年,P22-45
[3]方明山,20世纪桥梁工程发展历程回顾及展望,桥梁建设,1999第1期,P58- 60
[4]徐君兰,项海帆,大跨度桥梁旌工控制,人民交通出版社,2000年
[5]杨沪湘,陈湘林,预应力连续梁顶推技术的成熟,公路与汽运,2001年3月第3期,P10-13
[6]汤俊生,PC梁顶推技术的回顾与展望,桥梁建设,1996年第1期,P11-14
[7] Skeet,James A.,Lester,W.B.,McClary,Calvin T.,Incremental launch:The Stoney Trail bridge,Concrete International,February 2006,04,P53-57
[8]上官兴,连续梁桥顶推新构思,东北公路,1994,04,P71-82
[9]上官兴,郭圣栋,周湘政,中国桥梁顶推技术新发展,第十三届海峡两岸都市交通学术研讨会都市区及区域交通现代化,2005年,P33-67
[10]陈湘林,《九孔50m预应力连续箱梁顶推法施工》,湖南交通科技,1994年12月,增刊
[11]薛江伟赵辉,叶李,《竹埠港湘江大桥多点顶推法的施工》,公路,2003年1月,第三期
[12]杨昀,《用顶推法修建大跨度连续梁桥(丘墩大桥设计简介) [J]》,华东情报网,1988年
[13]秦占海,《浅谈某大桥主桥连续箱梁顶推施工技术[J]》,广东建材,2008,01
[14]粟忠民,何大河,龚平,《多点柔性墩连续顶推技术在梁桥中的应用》,湖城建高等专科学校学报,2002,02,P17-18
[15]叶见曙,黄平明.连续斜支承梁的计算模式及受载特性分析.土木工程学报,NO.2,l997
[16]姚玲森编译,《单跨斜支承梁的内力影响线》,国外公路,No.1.1988
[17]邵容光,《斜交板的平面内位移计算》.华东公路,No.5,1988
[18]颜东煌,田伸初,李学文.桥梁结果电算程序设计》.湖南大学出版社,1999
[19]钟启宾,我国连续项推技术的最新发展概况》.桥梁建设,1994,(2),P 46-48
[20]盛兴旺,预应力混凝土斜交箱形梁分析理论与试验研究》,中南大学,2000年
[21]颜全胜,王卫锋,邹小江,《顶推法施工过程仿真分析软件的研制》.世界桥粱,N0.3.2003
[22]田仲初,张华平,《顶推施工中导梁的合理配置》,世界桥梁,2005.04
[23]刘晓霞,邱琼海,张建红,郑机.《东海大桥8150m顶推箱梁施工技术》,世界桥梁.2004增刊
[24]黄平明,《连续斜箱梁桥的统一计算模式》.中国公路学报,NO.2,1999
[25]张晓东,《桥梁顶推施正技术》,公路,2003年9月第9期
[26]徐化轩,《顶推梁桥旌工中可能出现的技术问题及对策》,铁道工程学报,2002年第2期
[27]田启军,陈湘林,《顶推施工中导梁的应用与锚固措施的优化》,中外公路,2003年第6期
[28]崔科宇,《多点曲线连续顶推施工技术[D]》西南交通大学工程硕士论文, 2003年
[29]张华平,《混凝土斜连续梁桥顶推施工控制技术研究[D]》.,长沙理工大学硕士论文, 2005-4
[30]黄平明,《混凝土斜梁桥》,人民交通出版社, 2000-8.
[31] Rosignoli M,Influences of the incremental launching construction method on the sizing of prestressed concrete bridge decks,Proceedings of the Institution of Civil Engineers,Structuces and Buildings,1997,1 22,316-325
[32] Rosignoli M,Solution of the contimuous beam in launched bridges,Proceedings of the Institution of Civil Engineers,Structures and Buildings,1997,122,390-398
[33] N J Beaney,J M.Martin,Design and construction of the Dornoch Firth Bridge,construction Proceedings of Institution Civil Engineerings,Transportation, 1993,100,Aug,145-156
[34] James.A Skeet,W B Lester,and Calvin T McClar,Incremental Launch The Stoney Trail Bridge,Concrete International,Feb 1 998
[35] F.N Rowlcy,Incremental launch bridges,UK practice and sortie foreign comparisons,Institution of structural Engineers,May,1998
[36] Wilhelm Zellner,Incremental Launching of Structures,ASCE International Convention and Exibition,May,1998
[37]崔科宇.,《多点曲线连续顶推施工技术(西南交通大学工程硕士论文)》,2003年
[38]郭忠,《大坡度斜交不对称PC箱形连续梁的节段拼装和顶推架设.铁道建筑技术》,No.2,1996年
[39]赵志平,《桥梁顶推施工的精度探讨》,桥梁建设,No.2,1994年
[40]范立础。《桥梁工程》.北京:人民交通出版社,2001年
[41]高以利,凌国石,《斜交箱梁顶推法架设施工技术》,建筑施工,No.3,2003年