设计荷载作用下先简支后连续小箱梁桥的内力分析
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摘要
近年来,随着我国综合国力的不断增强,高速公路也得到了前所未有的发展。高速度的行车要求公路上的桥梁具有较好的连续性能、较少的伸缩缝构造,以提供高速、平稳、舒适的行车条件。先简支后连续小箱梁结构体系结合了连续梁和预制梁的优点,因此得到了广泛的应用和发展。
本文首先总结了先简支后连续结构体系的发展概况和研究现状,并总结了该体系的分析理论和次内力计算方法。在此基础上,针对体系转换和体系不转换结构中有争议的后连续端部浇筑顺序和后连续预应力张拉顺序问题进行了分析,提出了后连续端部的浇筑和预应力筋的张拉的“隔跨”原则。
其次,以六跨一联先简支后连续桥梁为例,详细分析了结构在运营期间混凝土徐变对结构受力的影响,对影响徐变次内力的参数如:持荷时间、混凝土养护龄期、后期预应力筋长度、桥梁跨数、环境湿度因素等作出了分析,并根据分析结果对该类型桥梁的设计提出了相应的改进方案。
另外,对于不同国家规范下温度梯度对该结构体系的内力影响进行分析。最后指出了下一步工作的研究重点和方向。
Recently, the highway had unprecedented developed with the enhancement of comprehensive national power in our country.In order to provide fastly and comfortable driving condition, high qualities of the bridges were required in the highway.The high qualities were better continuous performance and less expansion joints. Because of the first simply then continuously supported small span box-girder bridge combines the advantages of the continuous beam bridges and the precast beam bridges, it had been widely applied and developed.
Firstly, this thesis summarizes development situation, present research status, analysis theory and method of the first simply then continuously supported structure systerm.On the basis of the simulative research results, the method is applied to analyze some controversial problems(such as the concrete pouring sequence of continuous ends, the applying sequence of prestressing force) in this kinds of structural transformative/untranformative system. Some important conclusions are drawn: the concrete pouring sequence of continuous ends and the applying sequence of prestressing force should be in accordance with the principle of "interval end".
Secondly, taking six-spans the first simply then continuously supported bridge for example, this paper analyzes in considerable details the effect of concrete creep upon the internal force of the structure during service period of the bridge, in which the parameters such as loading duration. concrete ages, the number of spans, the humidity of circumstance and later period length of prestressing tendons are considered, and also proposes the corresponding improvements to the design of such type of bridge structure in accordance with the analytical results obtained therefrom.
Finally, on the basis of different national codes, effects of temperature gradient to this structure systerm are analyzed in the thesis and next direction and emphasis of research are pointed out .
本文首先总结了先简支后连续结构体系的发展概况和研究现状,并总结了该体系的分析理论和次内力计算方法。在此基础上,针对体系转换和体系不转换结构中有争议的后连续端部浇筑顺序和后连续预应力张拉顺序问题进行了分析,提出了后连续端部的浇筑和预应力筋的张拉的“隔跨”原则。
其次,以六跨一联先简支后连续桥梁为例,详细分析了结构在运营期间混凝土徐变对结构受力的影响,对影响徐变次内力的参数如:持荷时间、混凝土养护龄期、后期预应力筋长度、桥梁跨数、环境湿度因素等作出了分析,并根据分析结果对该类型桥梁的设计提出了相应的改进方案。
另外,对于不同国家规范下温度梯度对该结构体系的内力影响进行分析。最后指出了下一步工作的研究重点和方向。
Recently, the highway had unprecedented developed with the enhancement of comprehensive national power in our country.In order to provide fastly and comfortable driving condition, high qualities of the bridges were required in the highway.The high qualities were better continuous performance and less expansion joints. Because of the first simply then continuously supported small span box-girder bridge combines the advantages of the continuous beam bridges and the precast beam bridges, it had been widely applied and developed.
Firstly, this thesis summarizes development situation, present research status, analysis theory and method of the first simply then continuously supported structure systerm.On the basis of the simulative research results, the method is applied to analyze some controversial problems(such as the concrete pouring sequence of continuous ends, the applying sequence of prestressing force) in this kinds of structural transformative/untranformative system. Some important conclusions are drawn: the concrete pouring sequence of continuous ends and the applying sequence of prestressing force should be in accordance with the principle of "interval end".
Secondly, taking six-spans the first simply then continuously supported bridge for example, this paper analyzes in considerable details the effect of concrete creep upon the internal force of the structure during service period of the bridge, in which the parameters such as loading duration. concrete ages, the number of spans, the humidity of circumstance and later period length of prestressing tendons are considered, and also proposes the corresponding improvements to the design of such type of bridge structure in accordance with the analytical results obtained therefrom.
Finally, on the basis of different national codes, effects of temperature gradient to this structure systerm are analyzed in the thesis and next direction and emphasis of research are pointed out .
引文
1.李坚.我国预应力混凝土连续梁桥的发展与工程实践.第十四界全国桥梁学会会议论文集.人民交通出版社,南京:2000
2.丁如珍.恒载简支、活载连续、支点不转换的连续梁设想.华东公路,上海:1996
3.许贤敏(编译).预制梁式桥的连续性保持法.国外桥梁.武汉:1998
4.何林兴(编译).预应力混凝土构件由简支变连续的新技术.国外公路,长沙:1995
5.陈强.先简支后连续结构体系研究.浙江大学博士学位论文.杭州:2003
6.千学军.先简支后连续预应力混凝土组合T梁研究.东南大学硕士学位论文.南京:2003
7.曾宪武等.桥梁建设的回顾和展望.中国公路学会桥梁和结构工程学会2001桥梁学术讨论会论文集.人民交通出版社.北京:2001
9.孙东利等.津晋高速公路工程先简支后连续小箱梁的设计.人津市政设计.天津:2003
10.谢琪.结合光明桥谈先简支、后连续预应力混凝土连续梁的设计与施工.福建建筑,福州:1997
11.苏卫.乌龙江特大桥引桥先简支后连续结构的试验研究.华东公路.上海:2000
12.刘光明.先简支后连续无缝桥梁初探.湖南交通科技.长沙1999
13.曹俊伟.八尺门特大桥先简支后联系施工技术.山西建筑.太原:2001
14.付东阳,房贞政.高等级公路桥梁先简支后连续体系研究.福州大学学报(自然科学,福
15.谢小兵.先简支后连续部分预应力混凝土工字型梁设计体会.中南公路工程.2000
16.何山清等.苏嘉杭高速公路简支转连续T梁设计.华东公路.上海:2002
17.上官萍,付东阳等.先简支后连续桥梁结构体系的应用研究.福州大学学报(自然科学版).福州:2000
18.张西宁,王美强.简支变连续梁加固方法效应分析.辽宁交通科技.2005
19.方志,李艳等.先简支后连续桥梁徐变影响的参数分析.桥梁建设.2003
20.杨永超.多跨桥梁先简支后连续施工工艺分析.西部探矿工程.2003
21.于学军.简支转预应力结构连续T型桥梁设计计算.世界桥梁.2003
22.彭翠龄.简支转预应力连续结构受力特性分析与比较.交通科技.2002
23.张鲲,刘凯.浅谈先简支后连续预应力混凝土梁施工技术.青海交通科技.2003
24.郭泽刚.浅谈装配式部分预应力混凝土连续箱梁桥施工控制.山西交通科技.2004
25.何山清,彭英.苏嘉杭高速公路简支转连续T梁设计.华东公路.2002
26.林炎.先简支后连续桥梁施工技术方案.交通科技.2004
27.胡义松.先简支后连续T梁的施工.安徽建筑.2002
28.王春强,冀光华.先简支后连续T梁支座体系转换工艺初探.隧道建设.2005
29.高发征,周敏娟.先简支后连续公路箱梁施工技术.石家庄铁道学院院报.2002
30.王洪超.先简支后连续结构体系的施工工序优化.地基基础工程.2005
31.陈鹿.超静定多跨连续梁体系转换中应注意的问题.铁道标准设计.1999
32.姜云霞.先简支后连续梁板桥体系转化的研究.公路.2003
33.周长青.先简支后连续梁板预应力的计算与施工控制.山西交通科技.2003
34.涂相友,程菊花.先简支后连续梁桥的工艺探讨.桥梁建设.2003
35.成刚.先简支后连续梁桥体系转换最优化工序的研究.科技与经济.2006
36.杨云蓉.先简支后连续桥梁的设计计算.山西建筑.2003
37.Freyermuth C.L.Design of continuous highway bridges with.precast,prestressed concrete girders.PCI Journal,April 1969,Page:14-39
38.Caroland Wlliam B.,Depp David,Janssen Hubert H.,Spaans Loe,Spliced Segmental prestressed concrete I-beams for Shelbly Creek bridge.PCI Journal,Septemper-October,1992,Page:22-23
39.R.Mari,J.Montaner,continuous precast concrete girder and slab bridge decks.Proc.In s-tn Civ.Engrs Structs.&Bldgs,2000,14,Aug.,Page:196-206
40.T.I.Campbell,Venkatesh Kumar R.Kour,Deformation controlled nonlinear analysia of prestressed concrete continuous beams.PCI Journal,September-October 1990,Page:42-55
41.Engin Keyder,Friction losses in prestressed steel by equivalent load method,PCI Journal,marchr-April 1990,Page:74-77
42.Ahmad M.Abdel-Karim,Maher K.Tadros,Design and construction of spliced I-girder bridges,PCI Journal,July-August 1992,Page:114-122
43.Elbadry,M.and Ghali,A.Temperature viritions in concrete bridges,Journal of Structural Engineering,ASCE,1983,109(10)
44.Elbadry,M.and Ghali,A.Nonlinear temperature distribution and its effects on bridge,LABSE Periodica,No.P66/83,International Association for Bridge and Structural Engineering,Zurich,1983,8:169-191
45.Chen Hengzhi,Xie Xu,Zhang Zhicheng.Temperature field and stress field of prestressed concrete box-girder bridge[J].Journal of Zhenjiang University vol.39,no.12Dec.2005
46.Wang shengrui,Mao Tianer.Temperature stress of RC concrete component induced by linear,expension coefficient difference [J].Journal Wuhan Univerdity of Technology,Materials Science Edition vol14,no.1 1999:58-61
47.中华人民共和国交通部.《公路钢筋混凝土及预应力混凝土桥涵设计规范》.人民交通出版社.2004
48.中华人民共和国交通部.《公路桥涵设计通用规范》.人民交通出版社.2004
49.中华人民共和国铁道部.《铁路桥涵钢筋混凝土和预应力混凝土结构设计规范》.中国铁道出版社.2005:93-95
50.付东阳.先简支后连续结构体系的试验研究.福州大学硕士论文.1997年
2.丁如珍.恒载简支、活载连续、支点不转换的连续梁设想.华东公路,上海:1996
3.许贤敏(编译).预制梁式桥的连续性保持法.国外桥梁.武汉:1998
4.何林兴(编译).预应力混凝土构件由简支变连续的新技术.国外公路,长沙:1995
5.陈强.先简支后连续结构体系研究.浙江大学博士学位论文.杭州:2003
6.千学军.先简支后连续预应力混凝土组合T梁研究.东南大学硕士学位论文.南京:2003
7.曾宪武等.桥梁建设的回顾和展望.中国公路学会桥梁和结构工程学会2001桥梁学术讨论会论文集.人民交通出版社.北京:2001
9.孙东利等.津晋高速公路工程先简支后连续小箱梁的设计.人津市政设计.天津:2003
10.谢琪.结合光明桥谈先简支、后连续预应力混凝土连续梁的设计与施工.福建建筑,福州:1997
11.苏卫.乌龙江特大桥引桥先简支后连续结构的试验研究.华东公路.上海:2000
12.刘光明.先简支后连续无缝桥梁初探.湖南交通科技.长沙1999
13.曹俊伟.八尺门特大桥先简支后联系施工技术.山西建筑.太原:2001
14.付东阳,房贞政.高等级公路桥梁先简支后连续体系研究.福州大学学报(自然科学,福
15.谢小兵.先简支后连续部分预应力混凝土工字型梁设计体会.中南公路工程.2000
16.何山清等.苏嘉杭高速公路简支转连续T梁设计.华东公路.上海:2002
17.上官萍,付东阳等.先简支后连续桥梁结构体系的应用研究.福州大学学报(自然科学版).福州:2000
18.张西宁,王美强.简支变连续梁加固方法效应分析.辽宁交通科技.2005
19.方志,李艳等.先简支后连续桥梁徐变影响的参数分析.桥梁建设.2003
20.杨永超.多跨桥梁先简支后连续施工工艺分析.西部探矿工程.2003
21.于学军.简支转预应力结构连续T型桥梁设计计算.世界桥梁.2003
22.彭翠龄.简支转预应力连续结构受力特性分析与比较.交通科技.2002
23.张鲲,刘凯.浅谈先简支后连续预应力混凝土梁施工技术.青海交通科技.2003
24.郭泽刚.浅谈装配式部分预应力混凝土连续箱梁桥施工控制.山西交通科技.2004
25.何山清,彭英.苏嘉杭高速公路简支转连续T梁设计.华东公路.2002
26.林炎.先简支后连续桥梁施工技术方案.交通科技.2004
27.胡义松.先简支后连续T梁的施工.安徽建筑.2002
28.王春强,冀光华.先简支后连续T梁支座体系转换工艺初探.隧道建设.2005
29.高发征,周敏娟.先简支后连续公路箱梁施工技术.石家庄铁道学院院报.2002
30.王洪超.先简支后连续结构体系的施工工序优化.地基基础工程.2005
31.陈鹿.超静定多跨连续梁体系转换中应注意的问题.铁道标准设计.1999
32.姜云霞.先简支后连续梁板桥体系转化的研究.公路.2003
33.周长青.先简支后连续梁板预应力的计算与施工控制.山西交通科技.2003
34.涂相友,程菊花.先简支后连续梁桥的工艺探讨.桥梁建设.2003
35.成刚.先简支后连续梁桥体系转换最优化工序的研究.科技与经济.2006
36.杨云蓉.先简支后连续桥梁的设计计算.山西建筑.2003
37.Freyermuth C.L.Design of continuous highway bridges with.precast,prestressed concrete girders.PCI Journal,April 1969,Page:14-39
38.Caroland Wlliam B.,Depp David,Janssen Hubert H.,Spaans Loe,Spliced Segmental prestressed concrete I-beams for Shelbly Creek bridge.PCI Journal,Septemper-October,1992,Page:22-23
39.R.Mari,J.Montaner,continuous precast concrete girder and slab bridge decks.Proc.In s-tn Civ.Engrs Structs.&Bldgs,2000,14,Aug.,Page:196-206
40.T.I.Campbell,Venkatesh Kumar R.Kour,Deformation controlled nonlinear analysia of prestressed concrete continuous beams.PCI Journal,September-October 1990,Page:42-55
41.Engin Keyder,Friction losses in prestressed steel by equivalent load method,PCI Journal,marchr-April 1990,Page:74-77
42.Ahmad M.Abdel-Karim,Maher K.Tadros,Design and construction of spliced I-girder bridges,PCI Journal,July-August 1992,Page:114-122
43.Elbadry,M.and Ghali,A.Temperature viritions in concrete bridges,Journal of Structural Engineering,ASCE,1983,109(10)
44.Elbadry,M.and Ghali,A.Nonlinear temperature distribution and its effects on bridge,LABSE Periodica,No.P66/83,International Association for Bridge and Structural Engineering,Zurich,1983,8:169-191
45.Chen Hengzhi,Xie Xu,Zhang Zhicheng.Temperature field and stress field of prestressed concrete box-girder bridge[J].Journal of Zhenjiang University vol.39,no.12Dec.2005
46.Wang shengrui,Mao Tianer.Temperature stress of RC concrete component induced by linear,expension coefficient difference [J].Journal Wuhan Univerdity of Technology,Materials Science Edition vol14,no.1 1999:58-61
47.中华人民共和国交通部.《公路钢筋混凝土及预应力混凝土桥涵设计规范》.人民交通出版社.2004
48.中华人民共和国交通部.《公路桥涵设计通用规范》.人民交通出版社.2004
49.中华人民共和国铁道部.《铁路桥涵钢筋混凝土和预应力混凝土结构设计规范》.中国铁道出版社.2005:93-95
50.付东阳.先简支后连续结构体系的试验研究.福州大学硕士论文.1997年