变截面波形钢腹板箱梁剪应力计算理论
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摘要
在平截面假定和无相对滑移等条件下,基于弹性梁段微元给出了变宽变高波形钢腹板截面剪应力计算理论,认为剪力、弯矩和轴力均会产生剪应力,并且后两者仅仅在变截面产生剪应力.建立了有限元模型,并将传统计算理论和该计算理论与有限元计算结果进行对比,验证了该计算理论的可靠性.
Under the plane-section assumption and the premise that no relative slip exists, a calculation theory of shear stress in the variable depth and width box sections with corrugated steel webs based on elastic beam elements is given. The calculation theory proposes that shear, moment and axial force will all produce shear stress, and the latter two can produce shear stress only in the case of variable cross section. For further analysis, a finite element model is established, and a comparison among the traditional calculation theory, the calculation theory and the results of the finite element model is conducted. The calculation theory is proven to be reliable.
Under the plane-section assumption and the premise that no relative slip exists, a calculation theory of shear stress in the variable depth and width box sections with corrugated steel webs based on elastic beam elements is given. The calculation theory proposes that shear, moment and axial force will all produce shear stress, and the latter two can produce shear stress only in the case of variable cross section. For further analysis, a finite element model is established, and a comparison among the traditional calculation theory, the calculation theory and the results of the finite element model is conducted. The calculation theory is proven to be reliable.
引文
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[14] 李杰.变截面波形钢腹板组合箱梁腹板剪应力实用计算方法研究[J].铁道科学与工程学报,2017,14(1):80.LI Jie.Research on practical shear stress calculation of variable cross-section composited box-girder with corrugated steel webs[J].Journal of Railway Science and Engineering,2017,14(1):80.
[2] ELGAALY M.Bridge girders with corrugated webs[J].Journal of the Transportation Research Board,2000,1696(1):162.
[3] ABBAS H H,SAUSE R,DRIVER R G.Behavior of corrugated web i-girders under in-plane loads[J].Journal of Engineering Mechanics,2006,132 (8):806.
[4] CAFOLLA J.Corrugated webs in plate girders for bridges[J].Structures & Buildings,1997,122 (2) :157.
[5] 李立峰,刘志才,王芳.波形钢腹板组合箱梁弹性阶段弯曲理论及模型试验研究[J].公路交通科技,2008(1):69.LI Lifeng,LIU Zhicai,WANG Fang.Research on flexure theory at elastic stage and model test of composite box-girder with corrugated steel webs[J].Highway Traffic Science and Technology,2008(1):69.
[6] 侯立超.波形钢腹板抗剪性能的研究[D].长沙:湖南大学,2015.HOU Lichao.Study on shear resistance of corrugated steel web [D].Changsha:Hunan University,2015.
[7] 周绪红,孔祥福,侯健,等.波纹钢腹板组合箱梁的抗剪受力性能[J].中国公路学报,2007,20(2):77.ZHOU Xuhong,KONG Xiangfu,HOU Jian,et al.Shear mechanical property of composite box girder with corrugated steel webs[J].China Journal of Highway and Transport,2007,20(2):77.
[8] 聂建国,李法雄.考虑腹板剪切行为的波形钢腹板梁理论模型[J].中国公路学报,2011,24(6):40.NIE Jianguo,LI Faxiong.Theory model of corrugated steel web girder considering web shear behavior[J].China Journal of Highway and Transport,2011,24(6):40.
[9] DRIVER R G,ABBAS H H,SAUSE R.Shear behavior of corrugated web bridge girders[J].Journal of Structural Engineering,2006,132(2):195.
[10] 苏俭,刘钊.变截面波形钢腹板组合箱梁剪应力计算及分布规律研究[J].结构工程师,2010,26(6):32.SU Jian,LIU Zhao.Shear stress calculation and distribution in non-prismatic box girders with corrugated steel webs[J].Structural Engineers,2010,26(6):32.
[11] 中华人民共和国住房和城乡建设部.GB50917—2013钢-混凝土组合桥梁设计规范 [S].北京:中国计划出版社,2013.Ministry of Housing and Urban and Rural Construction of the People’s Republic of China.GB50917—2013 Design specification for steel-concrete composite bridges [S].Beijing:China Planning Publishing House,2013.
[12] 刘玉擎,陈艾荣.组合折腹桥梁设计模式指南[M].北京:人民交通出版社股份有限公司,2015.LIU Yuqing,CHEN Airong.Guide to design model of combination folding bridge [M].Beijing:China Communications Press Co.,Ltd.,2015.
[13] 同济大学材料力学教研室.材料力学:上册[M].上海:同济大学出版社,1987.Department of Materials Mechanics of Tongji University.Material mechanics:volume one [M].Shanghai:Tongji University Press,1987.
[14] 李杰.变截面波形钢腹板组合箱梁腹板剪应力实用计算方法研究[J].铁道科学与工程学报,2017,14(1):80.LI Jie.Research on practical shear stress calculation of variable cross-section composited box-girder with corrugated steel webs[J].Journal of Railway Science and Engineering,2017,14(1):80.