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工程科学与技术:2022,54(2):133-140
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组合桥面板-波形腹板钢箱简支组合梁温度效应
(1.兰州交通大学 土木工程学院, 甘肃 兰州 730070;2.兰州交通大学 甘肃省道路桥梁与地下工程重点实验室, 甘肃 兰州 730070;3.南京工业大学 交通运输工程学院, 江苏 南京 210009)
Temperature Effect of Simply Supported Composite Box Girder with Corrugated Steel Webs and Composite Deck
(1.School of Civil Eng., Lanzhou Jiaotong Univ., Lanzhou 730070, China;2.Key Lab. of Road & Bridge and Underground Eng. of Gansu Province, Lanzhou Jiaotong Univ., Lanzhou 730070, China;3.College of Transportation Sci. & Eng., Nanjing Tech. Univ., Nanjing 210009, China)
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投稿时间:2021-01-18    修订日期:2021-03-15
中文摘要: 钢-混凝土组合梁桥由于钢和混凝土热工参数的显著差异,使得该类结构在西北高寒、大温差地区受梯度温度影响较突出。以甘肃省某高速公路上一座组合桥面板-波形腹板钢箱简支组合梁为背景,考虑组合桥面板有效刚度、子梁微段内力平衡、子梁间变形协调和腹板剪切变形效应,建立组合箱梁桥温度效应解析计算方法;通过精细有限元数值模拟验证了其可靠性。研究结果表明:组合箱梁在竖向温度梯度作用下,子梁弯矩、应力和界面剪力沿梁轴向呈双曲余弦分布,层间相对滑移则呈双曲正弦分布;是否考虑腹板剪切变形对组合箱梁梁端温度响应影响较大,沿梁轴向的影响范围主要与层间滑移刚度相关;忽略波形钢腹板剪切变形效应易导致对梁中部层间相对滑移计算结果偏小、对梁端附近界面剪力和相对滑移值过大等问题,在结构设计中应予以重视;组合桥面板与腹板交界面温差和混凝土线膨胀系数对结构温度响应的影响不容忽视,设计中可通过优化布置剪力连接件来削弱或消除不利因素对结构的影响。
Abstract:Aiming at the outstanding problem that the composite bridge is affected by the gradient temperature in the life cycle of the northwest alpine and large temperature difference area. Based on the new-model corrugated steel web (CSW) simply supported composite box girder on a highway in Gansu Province, an analytical calculation method of temperature effect of the composite box girder bridge was established by considering the effective stiffness of the composite bridge panel, the internal force balance of the micro-section of the sub-beam, the deformation coordination between the sub-beam and the shear deformation effect of the web.The reliability of the method was verified by fine finite element numerical simulation. The results showed that under the vertical temperature gradient, the bending moment, stress and interfacial shear of the composite box girder were hyperbolic cosine distribution along the beam axis, while the relative slip between layers was hyperbolic sine distribution. Whether the web shear deformation was considered or not had a great influence on the temperature response of the composite box girder, and the influence range along the beam axis was mainly related to the interlaminar slip stiffness. Ignoring the shear deformation effect of corrugated steel web could easily lead to the small calculation results of interlayer slip in the middle of the beam, but the problems of excessive interlayer shear force and relative slip value near the end of the beam should be paid more attention in the structural design. The influence of temperature difference between composite bridge slab and web interface and concrete line expansion coefficient on the temperature response of the structure cannot be ignored. In the design, the adverse effects of the above factors on the structure can be weakened or eliminated by optimizing the layout of shear connectors.
文章编号:202100068     中图分类号:U441+.5    文献标志码:
基金项目:国家自然科学基金资助项目(51568036;51868040);甘肃省自然科学基金项目(20JR10RA237)
作者简介:第一作者:王力(1993-),男,讲师,博士.研究方向:钢-混凝土组合梁理论;桥梁抗震.E-mail:wanglilzjtu@126.com
引用文本:
王力,刘世忠,李子奇,黄佼佼,丁万鹏.组合桥面板-波形腹板钢箱简支组合梁温度效应[J].工程科学与技术,2022,54(2):133-140.
WANG Li,LIU Shizhong,LI Ziqi,HUANG Jiaojiao,DING Wanpeng.Temperature Effect of Simply Supported Composite Box Girder with Corrugated Steel Webs and Composite Deck[J].Advanced Engineering Sciences,2022,54(2):133-140.