三塔四跨单索面大翼缘矮塔斜拉桥塔墩梁固结区域局部应力分析
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摘要
矮塔斜拉桥塔墩梁固结区域构造、钢束布置和应力状态都十分复杂,是大跨度矮塔斜拉桥的关键受力部位。以104国道某跨径布置为(140+2×225+120)m的矮塔斜拉桥为工程背景,利用有限元分析软件ANSYS对塔墩梁固结部位进行精细的有限元局部应力分析,得到3种典型工况下的应力分布情况,验证设计的安全性和合理性,并针对大翼缘结构边缘拉应力过大的问题提出应力优化方案,对该类型矮塔斜拉桥的设计和施工具有重要的参考价值。
The pylon-pier-girder rigid region is the key component for the long span extradosed cable-stayed bridge due to its complicated configuration and stress states. With engineering background of an extradosed cable-stayed bridge in 104 national road of which the span arrangement is(140+2×225+120) m, the local stress of the pylon-pier-girder rigid region was analyzed and the stress distributions under three typical cases were obtained by using the finite element analysis software ANSYS. The results verify the safety and the reasonableness of the design. Further, some improvement measures were proposed for solving the serious problem of the tensile stress concentration in the end of long flange, which can give significant references for the design and construction of extradosed cable-stayed bridges of similar features.
The pylon-pier-girder rigid region is the key component for the long span extradosed cable-stayed bridge due to its complicated configuration and stress states. With engineering background of an extradosed cable-stayed bridge in 104 national road of which the span arrangement is(140+2×225+120) m, the local stress of the pylon-pier-girder rigid region was analyzed and the stress distributions under three typical cases were obtained by using the finite element analysis software ANSYS. The results verify the safety and the reasonableness of the design. Further, some improvement measures were proposed for solving the serious problem of the tensile stress concentration in the end of long flange, which can give significant references for the design and construction of extradosed cable-stayed bridges of similar features.
引文
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[4]姜冲虎,李德建.石河子独塔斜拉桥横向抗震合理约束体系研究[J].铁道科学与工程学报,2015,12(3):570-576.JIANG Chonghu,LI Dejian.Lateral seismic analysis and its restraint system feasibility of Shihezi single pylon cable-stayed bridge[J].Journal of Railway Science and Engineering,2015,12(3):570-576.
[5]周敏,戴公连,粟淼.槽形断面斜拉桥塔梁墩固结区应力的数值模拟[J].铁道科学与工程学报,2013,10(4):35-40.ZHOU Min,DAI Gonglian,SU Miao.Numerical simulation on stress of pier-tower-girder fixed region of U-shaped section cable-stayed bridge[J].Journal of Railway Science and Engineering,2013,10(4):35-40.
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[7]曹忠强.矮塔斜拉桥全桥静动力计算和塔墩梁固结部位详细应力分析研究[D].成都:西南交通大学,2008.CAO Zhongqiang.Static and dynamic calculation of the extradosed bridge and stress analysis for the pylon-pier-girder fixed region[D].Chengdu:Southwest Jiaotong University,2008.
[8]虞庐松,朱东生.部分斜拉桥塔墩梁固结点局部应力分析[J].桥梁建设,2008(1):54-57.YU Lusong,ZHU Dongsheng.Local stress analysis for the pylon-pier-girder rigid region of partially cable-stayed bridges[J].Bridge Consturction,2008(1):54-57.
[9]安永日,吕成林,燕海蛟,等.波形钢腹板组合箱梁矮塔斜拉桥塔墩梁固结段受力分析[J].世界桥梁,2012,40(6):38-42.AN Yongri,LüChenglin,YAN Haijiao,et al.Stress analysis for the pylon-pier-girder fixed region of extradosed bridge with composite box girder with corrugated steel webs[J].World Bridge,2012,40(6):38-42.
[10]JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].JTG D62—2004,Code for design of highway reinforced concrete and prestressed concrete bridges and culverts[S].
[2]Takami K,Hamada S.Behavior of extradosed bridge with composite girder[C]//Composite Construction in Steel and ConcreteⅣConference,2014:63-70.
[3]黎曙文,郭向荣,尹邦武.曲率半径对矮塔斜拉桥车桥耦合振动影响研究[J].铁道科学与工程学报,2014,11(2):28-34.LI Shuwen,GUO Xiangrong,YIN Bangwu.Research on the influence of curvature radius on vehicle-bridge coupled vibration on extradosed cable-stayed bridge[J].Journal of Railway Science and Engineering,2014,11(2):28-34
[4]姜冲虎,李德建.石河子独塔斜拉桥横向抗震合理约束体系研究[J].铁道科学与工程学报,2015,12(3):570-576.JIANG Chonghu,LI Dejian.Lateral seismic analysis and its restraint system feasibility of Shihezi single pylon cable-stayed bridge[J].Journal of Railway Science and Engineering,2015,12(3):570-576.
[5]周敏,戴公连,粟淼.槽形断面斜拉桥塔梁墩固结区应力的数值模拟[J].铁道科学与工程学报,2013,10(4):35-40.ZHOU Min,DAI Gonglian,SU Miao.Numerical simulation on stress of pier-tower-girder fixed region of U-shaped section cable-stayed bridge[J].Journal of Railway Science and Engineering,2013,10(4):35-40.
[6]黄力,刘志权,石雪飞.大跨径斜拉桥塔墩梁固结处空间受力分析[J].石家庄铁道大学学报(自然科学版),2012,25(4):23-26.HUANG Li,LIU Zhiquan,SHI Xuefei.Stress analysis for the pylon-pier-girder fixed region of long span cable-stayed bridge[J].Journal of Shijiazhuang Tiedao University(Natural Science),2012,25(4):23-26.
[7]曹忠强.矮塔斜拉桥全桥静动力计算和塔墩梁固结部位详细应力分析研究[D].成都:西南交通大学,2008.CAO Zhongqiang.Static and dynamic calculation of the extradosed bridge and stress analysis for the pylon-pier-girder fixed region[D].Chengdu:Southwest Jiaotong University,2008.
[8]虞庐松,朱东生.部分斜拉桥塔墩梁固结点局部应力分析[J].桥梁建设,2008(1):54-57.YU Lusong,ZHU Dongsheng.Local stress analysis for the pylon-pier-girder rigid region of partially cable-stayed bridges[J].Bridge Consturction,2008(1):54-57.
[9]安永日,吕成林,燕海蛟,等.波形钢腹板组合箱梁矮塔斜拉桥塔墩梁固结段受力分析[J].世界桥梁,2012,40(6):38-42.AN Yongri,LüChenglin,YAN Haijiao,et al.Stress analysis for the pylon-pier-girder fixed region of extradosed bridge with composite box girder with corrugated steel webs[J].World Bridge,2012,40(6):38-42.
[10]JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S].JTG D62—2004,Code for design of highway reinforced concrete and prestressed concrete bridges and culverts[S].