厦漳跨海大桥南汊主桥桥塔设计
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摘要
厦漳跨海大桥南汊主桥为主跨300m的双塔结合梁斜拉桥。对H形、钻石形、菱形和宝瓶形等塔形进行比选,最终确定该桥桥塔采用改进的H形钢筋混凝土桥塔(上塔柱竖直,中塔柱倾斜,下塔柱外侧面竖直、内侧面倾斜)。桥塔塔柱采用矩形空心截面,在塔底设置高4.0m的实体段;钢锚梁采用开口箱形截面;塔柱横梁为全预应力混凝土结构,箱形截面;承台采用哑铃形截面;桥塔基础采用钻孔灌注桩群桩基础。为检验桥塔受力,对裸塔和全桥进行整体计算,并采用ANSYS和MIDAS分析桥塔关键部位局部受力。分析结果表明,桥塔各部位受力均满足规范要求,并有一定的安全储备。
The south main bridge of the Xiazhang Sea-Crossing Bridge is a double-pylon composite girder cable-stayed bridge with a main span 300 m. In the design of the pylons of the bridge,the pylons of the H-shape,diamond shape,geometric diamond shape and flower vase shape were compared and it was finally determined that the modified H-shape reinforced concrete pylons (the upper columns of a pylon were vertical,the middle columns were inclined and the outer sides of the lower columns were vertical while the inner sides were inclined) should be used. The columns of the selected pylons are the rectangular hollow sections and at the footings of a pylon,the solid sections of 4. 0 m height are utilized. The steel anchor beams in the pylons are the open box sections. The cross beams of the pylons are the complete prestressed concrete structures of box sections. The pile cap on which a pylon stands is the dumbbell shape and the foundation is of the group bored piles. To check the force conditions of the pylons of the bridge,the global calculation of the free standing pylons and the whole bridge was made and the local force conditions of the critical parts of the pylons were analyzed,using the software ANSYS and MIDAS. The results of the analysis indicate that the force conditions of the different parts of the pylons can meet the relevant requirements in the codes and the pylons have certain safety margin.
The south main bridge of the Xiazhang Sea-Crossing Bridge is a double-pylon composite girder cable-stayed bridge with a main span 300 m. In the design of the pylons of the bridge,the pylons of the H-shape,diamond shape,geometric diamond shape and flower vase shape were compared and it was finally determined that the modified H-shape reinforced concrete pylons (the upper columns of a pylon were vertical,the middle columns were inclined and the outer sides of the lower columns were vertical while the inner sides were inclined) should be used. The columns of the selected pylons are the rectangular hollow sections and at the footings of a pylon,the solid sections of 4. 0 m height are utilized. The steel anchor beams in the pylons are the open box sections. The cross beams of the pylons are the complete prestressed concrete structures of box sections. The pile cap on which a pylon stands is the dumbbell shape and the foundation is of the group bored piles. To check the force conditions of the pylons of the bridge,the global calculation of the free standing pylons and the whole bridge was made and the local force conditions of the critical parts of the pylons were analyzed,using the software ANSYS and MIDAS. The results of the analysis indicate that the force conditions of the different parts of the pylons can meet the relevant requirements in the codes and the pylons have certain safety margin.
引文
[1]中交第一公路勘察设计研究院有限公司.厦漳跨海大桥工程施工图设计(南汊主桥)[Z].西安:2009.(CCCC First Highway Consultants Co.,Ltd.Con-struction Drawing Design(South Main Bridge)of Xi-azhang Sea-Crossing Bridge[Z].Xi'an:2009.in Chinese)
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[7]吴美艳,杨光武,郑舟军.马鞍山长江公路大桥塔梁固结处模型试验研究[J].桥梁建设,2011,(3):13-16.(WU Mei-yan,YANG Guang-wu,ZHENG Zhou-jun.Model Test Study of Rigid Fixity of Tower and Girder of Maanshan Changjiang River Highway Bridge[J].Bridge Construction,2011,(3):13-16.in Chinese)
[8]曾明根,苏庆田,吴冲.上海长江大桥组合索塔锚固区受力数值计算[J].桥梁建设,2007,(5):34-37.(ZENG Ming-gen,SU Qing-tian,WU Chong.Numerical Calculation of Stress Conditions of Anchorage Zone in Composite Pylon of Shanghai Changjiang River Bridge[J].Bridge Construction,2007,(5):34-37.in Chi-nese)
[9]刘昌鹏,张喜刚,王仁贵,等.组合结构的索塔锚固区受力及结构特点研究[J].公路,2012,(1):117-121.(LIU Chang-peng,ZHANG Xi-gang,WANG Ren-gui,et al.Study of Force Condition and Structural Characteris-tics of Anchorage Zone in Composite Structure Pylon[J].Highway,2012,(1):117-121.in Chinese)
[10]武文芳,赵雷.大跨度斜拉桥地震响应非线性时程分析[J].世界地震工程,2009,(4):18-24.(WU Wen-fang,ZHAO Lei.Nonlinear Time-Histo-ry Analysis of Seismic Response of a Long-Span Cable-Stayed Bridge[J].World Earthquake Engineering,2009,(4):18-24.in Chinese)
[11]李北星,万纯斌,孔秋珍,等.九江长江公路大桥索塔高性能清水混凝土耐久性研究[J].水运工程,2012,(6):86-91.(LI Bei-xing,WAN Chun-bin,KONG Qiu-zhen,et al.Study of Durability of High-Performance Fair-Faced Con-crete for Cable Tower of Jiujiang Yangtze River Highway Bridge[J].Port&Waterway Engineering,2012,(6):86-91.in Chinese)
[2]刘士林.斜拉桥设计[M].北京:人民交通出版社,2006.(LIU Shi-lin.Design of Cable-Stayed Bridges[M].Bei-jing:China Communications Press,2006.in Chinese)
[3]陈明宪.斜拉桥建造技术[M].北京:人民交通出版社,2003.(CHEN Ming-xian.Construction Technology of Cable-Stayed Bridges[M].Beijing:China Communications Press,2003.in Chinese)
[4]JTG/T D65-01-2007,公路斜拉桥设计细则[S].(JTG/T D65-01-2007,Guidelines for Design of Highway Cable-Stayed Bridge[S].)
[5]罗承斌,田唯,戴捷.苏通大桥300m高塔的设计与施工关键技术[J].中外公路,2008,(5):114-119.(LUO Cheng-bin,TIAN Wei,DAI Jie.Design and Key Construction Techniques of300m High Pylons of Sutong Bridge[J].Journal of China&Foreign Highway,2008,(5):114-119.in Chinese)
[6]张奇志,尹夏明,郑舟军.钢锚梁索塔锚固区受力机理分析与约束方式比选[J].桥梁建设,2012,42(6):50-56.(ZHANG Qi-zhi,YIN Xia-ming,ZHENG Zhou-jun.A-nalysis of Force Mechanism and Comparison of Restraint Ways for Steel Anchor Beam Anchorage Zone in Pylon[J].Bridge Construction,2012,42(6):50-56.in Chinese)
[7]吴美艳,杨光武,郑舟军.马鞍山长江公路大桥塔梁固结处模型试验研究[J].桥梁建设,2011,(3):13-16.(WU Mei-yan,YANG Guang-wu,ZHENG Zhou-jun.Model Test Study of Rigid Fixity of Tower and Girder of Maanshan Changjiang River Highway Bridge[J].Bridge Construction,2011,(3):13-16.in Chinese)
[8]曾明根,苏庆田,吴冲.上海长江大桥组合索塔锚固区受力数值计算[J].桥梁建设,2007,(5):34-37.(ZENG Ming-gen,SU Qing-tian,WU Chong.Numerical Calculation of Stress Conditions of Anchorage Zone in Composite Pylon of Shanghai Changjiang River Bridge[J].Bridge Construction,2007,(5):34-37.in Chi-nese)
[9]刘昌鹏,张喜刚,王仁贵,等.组合结构的索塔锚固区受力及结构特点研究[J].公路,2012,(1):117-121.(LIU Chang-peng,ZHANG Xi-gang,WANG Ren-gui,et al.Study of Force Condition and Structural Characteris-tics of Anchorage Zone in Composite Structure Pylon[J].Highway,2012,(1):117-121.in Chinese)
[10]武文芳,赵雷.大跨度斜拉桥地震响应非线性时程分析[J].世界地震工程,2009,(4):18-24.(WU Wen-fang,ZHAO Lei.Nonlinear Time-Histo-ry Analysis of Seismic Response of a Long-Span Cable-Stayed Bridge[J].World Earthquake Engineering,2009,(4):18-24.in Chinese)
[11]李北星,万纯斌,孔秋珍,等.九江长江公路大桥索塔高性能清水混凝土耐久性研究[J].水运工程,2012,(6):86-91.(LI Bei-xing,WAN Chun-bin,KONG Qiu-zhen,et al.Study of Durability of High-Performance Fair-Faced Con-crete for Cable Tower of Jiujiang Yangtze River Highway Bridge[J].Port&Waterway Engineering,2012,(6):86-91.in Chinese)
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