南平跨江大桥成桥状态与施工关键技术研究
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摘要
自锚式悬索-斜拉协作体系桥作为一种高次超静定结构体系,它不仅具有一般缆索承重桥梁的力学特性,更具有明显的几何非线性特点,同时由于加劲梁存在很大的轴力,存在着梁-柱效应。自锚式悬索-斜拉协作体系桥在各种荷载工况作用下,静、动力特性也比悬索桥和斜拉桥更为复杂,本论文以南平跨江大桥为工程背景,对其成桥状态及施工关键技术进行分析研究。
先对南平跨江大桥的成桥状态进行分析研究,以设计图纸为基础,已知主缆线形和吊杆与斜拉索索力标准值的情况下,利用主缆线形计算方法节线法求解各段主缆索力,将所求得的索力赋予有限元模型进行求解分析,验证桥梁结构达到合理目标成桥状态。
在得到的目标成桥状态下,取出加劲梁的钢-混结合段及与其相连接的钢箱梁和混凝土箱梁的一部分并结合有限元程序Ansys对其进行分析,研究钢-混结合段的传力与变形的连续性,同时研究剪力钉的受力与传力机理。通过对钢-混结合段不含剪力钉的整体和钢-混结合段含剪力钉的局部比较分析知,剪力连接构件-剪力钉能很好的起到抗滑移和传力作用,同时剪力钉与钢板连接端在设计中需设置加强构件以防止剪力钉被剪断。
为使加劲梁能达到成桥状态下的线形,对贝雷支架系统进行分析,研究预拱度产生的因素,在混凝土箱梁和钢箱梁的自重作用下,临时墩有一定的弹性变形,不可忽略不计,最终支架预拱度的设置构成主要有贝雷梁的弹性变形和由临时墩变形给贝雷梁带来的牵连位移。
对斜主塔竖转吊装结构进行仿真分析,研究主塔在不同位置时转体结构的最不利状态,发现最不利状态发生在主塔刚被提升时,在转体结构的最不利状态下局部分析转铰与主塔连接区域的应力与变形,可知转铰的耳板与主塔连接处应力水平高,需保证焊缝的强度,主塔上变形极小、应力水平较低,能够满足要求。
Self-anchored cable-stayed suspension bridge which is a high order statically indeterminate structure not only has mechanical properties of cable-supported bridge, and has geometric nonlinear features. It has beam-column effect because the stiffening girder exist enormous axial force. The static and dynamic characteristics of self-anchored cable-stayed suspension bridge which in various load cases are complex than suspension bridge or cable-stayed bridge. Its analysis based on Nan ping Kuajiang bridge in this paper.
Study on completion state of Nanping Kuajiang bridge based on design drawing, using segment line method to solving cable tension in the condition of known the cable curve and the standard value of hanger tension, then assign to finite element model to analysis. It is find that the bridge reach target completion state through the analysis.
Using finite element program Ansys to analysis the steel concrete combination segment in the target completion state, research force received and transfer mechanism. Meanwhile, it is to research anti-sliding and transfer mechanism of the shear studs. It finding that the shear connecting component - shear studs has a anti-sliding effect and must set stiffening member in root of the shear studs to prevent shear break, by the analysis between the whole steel concrete combination segment model and local model.
It analyzes bailey supporting system of stiffening girder for the purpose of reaching design alignment and composition of camber. The temporary pier will have elastic deformation under self weight of stiffening girder effects, and the deformation can't ignore. The finally camber is composed of elastic deformation of stiffening girder and temporary pier.
When the main tower is in the different position of the vertical rotation construction process, search the most unfavorable state of structure, and known it happened in the beginning of the process. It analyzes stress and deformation of the local region from the combination of hinge and main tower, and finds the stress level of lug and steel plate's connected region is very high, and must assure the intensity of welding line. The deformation and stress of main tower are very small, and can meet require.
先对南平跨江大桥的成桥状态进行分析研究,以设计图纸为基础,已知主缆线形和吊杆与斜拉索索力标准值的情况下,利用主缆线形计算方法节线法求解各段主缆索力,将所求得的索力赋予有限元模型进行求解分析,验证桥梁结构达到合理目标成桥状态。
在得到的目标成桥状态下,取出加劲梁的钢-混结合段及与其相连接的钢箱梁和混凝土箱梁的一部分并结合有限元程序Ansys对其进行分析,研究钢-混结合段的传力与变形的连续性,同时研究剪力钉的受力与传力机理。通过对钢-混结合段不含剪力钉的整体和钢-混结合段含剪力钉的局部比较分析知,剪力连接构件-剪力钉能很好的起到抗滑移和传力作用,同时剪力钉与钢板连接端在设计中需设置加强构件以防止剪力钉被剪断。
为使加劲梁能达到成桥状态下的线形,对贝雷支架系统进行分析,研究预拱度产生的因素,在混凝土箱梁和钢箱梁的自重作用下,临时墩有一定的弹性变形,不可忽略不计,最终支架预拱度的设置构成主要有贝雷梁的弹性变形和由临时墩变形给贝雷梁带来的牵连位移。
对斜主塔竖转吊装结构进行仿真分析,研究主塔在不同位置时转体结构的最不利状态,发现最不利状态发生在主塔刚被提升时,在转体结构的最不利状态下局部分析转铰与主塔连接区域的应力与变形,可知转铰的耳板与主塔连接处应力水平高,需保证焊缝的强度,主塔上变形极小、应力水平较低,能够满足要求。
Self-anchored cable-stayed suspension bridge which is a high order statically indeterminate structure not only has mechanical properties of cable-supported bridge, and has geometric nonlinear features. It has beam-column effect because the stiffening girder exist enormous axial force. The static and dynamic characteristics of self-anchored cable-stayed suspension bridge which in various load cases are complex than suspension bridge or cable-stayed bridge. Its analysis based on Nan ping Kuajiang bridge in this paper.
Study on completion state of Nanping Kuajiang bridge based on design drawing, using segment line method to solving cable tension in the condition of known the cable curve and the standard value of hanger tension, then assign to finite element model to analysis. It is find that the bridge reach target completion state through the analysis.
Using finite element program Ansys to analysis the steel concrete combination segment in the target completion state, research force received and transfer mechanism. Meanwhile, it is to research anti-sliding and transfer mechanism of the shear studs. It finding that the shear connecting component - shear studs has a anti-sliding effect and must set stiffening member in root of the shear studs to prevent shear break, by the analysis between the whole steel concrete combination segment model and local model.
It analyzes bailey supporting system of stiffening girder for the purpose of reaching design alignment and composition of camber. The temporary pier will have elastic deformation under self weight of stiffening girder effects, and the deformation can't ignore. The finally camber is composed of elastic deformation of stiffening girder and temporary pier.
When the main tower is in the different position of the vertical rotation construction process, search the most unfavorable state of structure, and known it happened in the beginning of the process. It analyzes stress and deformation of the local region from the combination of hinge and main tower, and finds the stress level of lug and steel plate's connected region is very high, and must assure the intensity of welding line. The deformation and stress of main tower are very small, and can meet require.
引文
[1]周孟波,刘自明,王邦楣,悬索桥手册,北京:人民交通出版社,2003,1.
[2]周孟波,斜拉桥手册,北京:人民交通出版社,2004,3.
[3](英)M.S.特罗伊茨基(M.S.Troitsky)著,王学俊等译,斜拉桥理论与设计,北京:中国铁道出版社,1980,7.
[4]陈仁福,大跨悬索桥理论,成都:西南交通大学出版社,1994,7-14.
[5]雷俊卿,郑明珠,徐恭义,悬索桥设计,北京:人民交通出版社,2002,3-5.
[6](英)M.S.特罗伊茨基(M.S.Troitsky)著,王学俊等译,斜拉桥理论与设计,北京:中国铁道出版社,1980,7.
[7]李国豪.桥梁与结构理论研究.上海:上海科学技术文献出版社,1983,1.
[8]铁道部大桥局桥梁科学研究所,悬索桥,北京:科学技术文献出版社,1996,1.
[9]Kim.Ho-Kyung,Lee.Myeong-Jae,Chang.Sung-Pil.Determination of hanger installation procedure for a self-anchored suspension bridge.Engineering Structures,2006.
[10]傅强,悬索桥空间非线性分析[J],同济大学学报,1997,7(3):66-68.
[11]John A.Ochsendorf.david P.Villington.Self-anchnored suspension bridges[J].Journal of Bridge Engineering,August 1999,Vol.4,No.3:151-155.
[12]Ho-Kyubg Kim,Myeong-Jae Lee,Sung-Pil Chang,Non-linear shape-finding analysis of a self-anchored suspensiong bridge,Engineering Structures,2002(24).
[13]ZHE ZHANG,YONGGANG TAN,LEI SHI.A New Searching Approach on the Calculation of the Target Configuration of Cables for Suspension Bridges[C],Proceedings of the 3rd International Conference on Current and Future Trends in Bridge Design,Construction and Maintenance,2003.
[14]沈锐利,悬索桥主缆系统设计及架设计算方法研究[J],土木工程学报,1996,29(2):3-9.
[15]唐茂林,强士中,沈锐利,悬索桥成桥主缆线形计算的分段悬链线法,铁道学报 2003,25(1):87-91.
[16]Raid Karoumi,Some modeling aspects in the nonlinear finite element analysis of cable supported bridges,Computers and Structures,1999(71).
[17]Manabu Itol Cable supported steel bridge:design problem and solutions[J].Journal of construct steel research.1996,39(1).
[18]张国志,张庆芳,邹振祝,悬索桥成桥状态计算方法,长安大学学报,2006,26(1):59-63.
[19]石磊,张哲,刘春成等,混凝土自锚式悬索桥设计及其力学性能分析[J],大连理工大学学报,2003,43(2):202-206.
[20]肖汝诚,贾丽君,薛二乐等,斜拉-悬索协作体系的设计探索[J],土木工程学报,2000,34(5):35-37.
[21]金增洪,悬索和斜拉复合桥梁的位移特征,中外铁路,2003,12(9):78-81.
[22]PAN Y R,DU GH,FAN L C.A fine calculation of the geometry and internal force of suspension bridge under dead load[J].China Journal of Highway and Transport,2000,13(4):33-36.
[23]YANGM G,CHEN Z Q.The nonlinear finite element analysis for two2 node catenary element of cable structure based on UL formulation[J].China Civil Engineering Journal,2003,36(8):63-68.
[24]JOHN S,RAFAL M,MARWAN N.Design of looping cable anchorage system for new San Francisco OaklandBay bridge main suspension span[J].Journal of Bridge Engineering,2002,7(6):315-324.
[25]张新军,陈艾荣等,悬索桥施工理想初态及成桥状态计算方法研究,上海铁道大学学报,1999,20(6):43-48.
[26]胡建华,向建军,刘榕等.平胜大桥独塔自锚式悬索桥的设计与关键技术[J].公路,2006,(5):99-104.
[27]Kim.Ho-Kyung,Lee.Myeong-Jae,Chang.Sung-Pil.Determination of hanger Installation procedure for a self-anchored suspension bridge.Engineering Structures,2006
[28]楼庄鸿,严文彪,自锚式悬索桥[A],中国公路学会桥梁和结构工程学会2002年全国桥梁学术会议论文[C]
[29]叶梅新,蒋彪,混合型自锚式悬索桥连接部位传力研究[J].铁道科学与工程,2006,3(3):1-6.
[30]王军文,倪章军,李建中,孙峻岭,石板坡长江大桥钢混结合段局部应力分析[J].公路交通科技.2007,24(18):99-102.
[31]罗如登,叶梅新.组合梁钢与混凝土板相对滑移及栓钉受力状态研究[J].铁道学报,2002,24(3):57-61.
[32]刘玉擎,曾明根,陈艾荣.连接件在桥梁结构中的应用与研究[J].哈尔滨工业大学学报,2003,35(增刊):272-275.
[33]JTGD62-2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[34]张志华,用贝雷梁支架系统进行自锚式悬索桥主梁施工[J].中国市政工程,2006,5(123):65-66.
[35]石占良,陈长明,自锚式悬索桥钢筋混凝土主梁施工[J].桥梁建设,2004,2:56-58.
[36]安娅荣,现浇连续箱梁支架设计及施工预拱度的测定[J].辽宁交通科技,2004,5:58-59.
[37]秦梅,马云昌,贝雷片支架的变形计算[J].合肥工业大学学报(自然科学版),1999,22(5):126-129.
[38]马恒,龙城大桥钢索塔竖转施工关键技术[J].现代交通技术,2008,5(3):50-53.
[39]张强,整体竖转技术在斜拉索桥倾斜索塔施工中的应用[J].建筑技术,2008,39(10):795-802.
[40]刘绍武等,仿真技术在某人行天桥钢塔竖转过程的应用[J].2006,5:59-63.
[41]GB50017-2003钢结构设计规范[S].
[2]周孟波,斜拉桥手册,北京:人民交通出版社,2004,3.
[3](英)M.S.特罗伊茨基(M.S.Troitsky)著,王学俊等译,斜拉桥理论与设计,北京:中国铁道出版社,1980,7.
[4]陈仁福,大跨悬索桥理论,成都:西南交通大学出版社,1994,7-14.
[5]雷俊卿,郑明珠,徐恭义,悬索桥设计,北京:人民交通出版社,2002,3-5.
[6](英)M.S.特罗伊茨基(M.S.Troitsky)著,王学俊等译,斜拉桥理论与设计,北京:中国铁道出版社,1980,7.
[7]李国豪.桥梁与结构理论研究.上海:上海科学技术文献出版社,1983,1.
[8]铁道部大桥局桥梁科学研究所,悬索桥,北京:科学技术文献出版社,1996,1.
[9]Kim.Ho-Kyung,Lee.Myeong-Jae,Chang.Sung-Pil.Determination of hanger installation procedure for a self-anchored suspension bridge.Engineering Structures,2006.
[10]傅强,悬索桥空间非线性分析[J],同济大学学报,1997,7(3):66-68.
[11]John A.Ochsendorf.david P.Villington.Self-anchnored suspension bridges[J].Journal of Bridge Engineering,August 1999,Vol.4,No.3:151-155.
[12]Ho-Kyubg Kim,Myeong-Jae Lee,Sung-Pil Chang,Non-linear shape-finding analysis of a self-anchored suspensiong bridge,Engineering Structures,2002(24).
[13]ZHE ZHANG,YONGGANG TAN,LEI SHI.A New Searching Approach on the Calculation of the Target Configuration of Cables for Suspension Bridges[C],Proceedings of the 3rd International Conference on Current and Future Trends in Bridge Design,Construction and Maintenance,2003.
[14]沈锐利,悬索桥主缆系统设计及架设计算方法研究[J],土木工程学报,1996,29(2):3-9.
[15]唐茂林,强士中,沈锐利,悬索桥成桥主缆线形计算的分段悬链线法,铁道学报 2003,25(1):87-91.
[16]Raid Karoumi,Some modeling aspects in the nonlinear finite element analysis of cable supported bridges,Computers and Structures,1999(71).
[17]Manabu Itol Cable supported steel bridge:design problem and solutions[J].Journal of construct steel research.1996,39(1).
[18]张国志,张庆芳,邹振祝,悬索桥成桥状态计算方法,长安大学学报,2006,26(1):59-63.
[19]石磊,张哲,刘春成等,混凝土自锚式悬索桥设计及其力学性能分析[J],大连理工大学学报,2003,43(2):202-206.
[20]肖汝诚,贾丽君,薛二乐等,斜拉-悬索协作体系的设计探索[J],土木工程学报,2000,34(5):35-37.
[21]金增洪,悬索和斜拉复合桥梁的位移特征,中外铁路,2003,12(9):78-81.
[22]PAN Y R,DU GH,FAN L C.A fine calculation of the geometry and internal force of suspension bridge under dead load[J].China Journal of Highway and Transport,2000,13(4):33-36.
[23]YANGM G,CHEN Z Q.The nonlinear finite element analysis for two2 node catenary element of cable structure based on UL formulation[J].China Civil Engineering Journal,2003,36(8):63-68.
[24]JOHN S,RAFAL M,MARWAN N.Design of looping cable anchorage system for new San Francisco OaklandBay bridge main suspension span[J].Journal of Bridge Engineering,2002,7(6):315-324.
[25]张新军,陈艾荣等,悬索桥施工理想初态及成桥状态计算方法研究,上海铁道大学学报,1999,20(6):43-48.
[26]胡建华,向建军,刘榕等.平胜大桥独塔自锚式悬索桥的设计与关键技术[J].公路,2006,(5):99-104.
[27]Kim.Ho-Kyung,Lee.Myeong-Jae,Chang.Sung-Pil.Determination of hanger Installation procedure for a self-anchored suspension bridge.Engineering Structures,2006
[28]楼庄鸿,严文彪,自锚式悬索桥[A],中国公路学会桥梁和结构工程学会2002年全国桥梁学术会议论文[C]
[29]叶梅新,蒋彪,混合型自锚式悬索桥连接部位传力研究[J].铁道科学与工程,2006,3(3):1-6.
[30]王军文,倪章军,李建中,孙峻岭,石板坡长江大桥钢混结合段局部应力分析[J].公路交通科技.2007,24(18):99-102.
[31]罗如登,叶梅新.组合梁钢与混凝土板相对滑移及栓钉受力状态研究[J].铁道学报,2002,24(3):57-61.
[32]刘玉擎,曾明根,陈艾荣.连接件在桥梁结构中的应用与研究[J].哈尔滨工业大学学报,2003,35(增刊):272-275.
[33]JTGD62-2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[34]张志华,用贝雷梁支架系统进行自锚式悬索桥主梁施工[J].中国市政工程,2006,5(123):65-66.
[35]石占良,陈长明,自锚式悬索桥钢筋混凝土主梁施工[J].桥梁建设,2004,2:56-58.
[36]安娅荣,现浇连续箱梁支架设计及施工预拱度的测定[J].辽宁交通科技,2004,5:58-59.
[37]秦梅,马云昌,贝雷片支架的变形计算[J].合肥工业大学学报(自然科学版),1999,22(5):126-129.
[38]马恒,龙城大桥钢索塔竖转施工关键技术[J].现代交通技术,2008,5(3):50-53.
[39]张强,整体竖转技术在斜拉索桥倾斜索塔施工中的应用[J].建筑技术,2008,39(10):795-802.
[40]刘绍武等,仿真技术在某人行天桥钢塔竖转过程的应用[J].2006,5:59-63.
[41]GB50017-2003钢结构设计规范[S].