| 钢-混凝土组合梁桥温度作用与效应综述 |
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| 引用本文： | 刘永健,刘江.钢-混凝土组合梁桥温度作用与效应综述[J].交通运输工程学报,2020,20(1):42-59. |
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| 作者姓名： | 刘永健 刘江 |
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| 作者单位： | 长安大学公路学院, 陕西 西安 710064 |
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| 基金项目： | 中央高校基本科研业务费专项;陕西省交通厅科研项目;国家自然科学基金 |
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| 摘 要： | 为深化对钢-混凝土组合梁桥温度作用与效应的认识, 从施工阶段水化热温度作用与效应计算, 运营阶段温度作用模式与取值, 以及温度效应计算方法等方面, 综述了国内外研究现状, 探讨了后续的研究重点和方向。研究结果表明: 现浇组合梁桥施工阶段水化热温度作用是桥面板早期开裂的重要原因, 准确计算组合梁水化热温度效应的关键在于选取更为准确适用的水化热模型和考虑温度变化对混凝土硬化过程中弹性模量、抗拉强度以及剪力钉连接刚度发展的影响; 运营环境下组合梁桥主要考虑均匀温度、正负温度梯度等3种温度作用模式, 由于不同国家气候环境的差异及研究历程的不同, 各国规范关于组合梁桥温度作用模式和取值的规定尚不统一, 温度梯度作用的取值并非基于统计分析方法得到, 在取值时亦未充分利用已有历史气象数据资源; 组合梁桥温度效应的计算多基于有限元数值模拟展开, 求解组合梁温度效应的解析计算方法也逐渐准确化, 钢-混界面关系已从不考虑界面滑移发展到考虑界面滑移, 温度分布模式从简单的钢-混均匀温差发展到钢与混凝土任意温度分布, 但还应加强建立任意边界组合梁温度效应求解的理论模型; 组合梁桥温度问题研究的未来发展方向应集中在开展基于效应分类的组合梁温度作用模式研究, 从机理上加强对组合梁温度自生效应和次生效应的认识, 加强组合梁桥长期温度实测, 基于统计分析确定组合梁温度作用代表值; 同时充分利用中国各地区气象部门历史气象数据, 开展组合梁温度作用地域差异性取值研究。
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| 关 键 词： | 桥梁工程 综述 钢-混凝土组合梁 温度作用 温度效应 解析方法 |
| 收稿时间： | 2019-09-12 |
Review on temperature action and effect of steel-concrete composite girder bridge |
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| LIU Yong-jian,LIU Jiang.Review on temperature action and effect of steel-concrete composite girder bridge[J].Journal of Traffic and Transportation Engineering,2020,20(1):42-59. |
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| Authors: | LIU Yong-jian LIU Jiang |
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| Affiliation: | School of Highway, Chang'an University, Xian 710064, Shaanxi, China |
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| Abstract: | To understand the temperature action and effect of composite girder bridge in depth, the research status of domestic and overseas, including the temperature action and effect of hydration heat in construction stage, the temperature action patterns and finding values methods in the operation stage, and the calculation methods of temperature effect, was summarized and analyzed. The subsequent research emphases and directions were discussed. Research result shows that the hydration heat temperature effect is an important reason for the early cracking of decks in cast-in-situ composite girder bridges. The accurate selection of applicable hydration heat model and the consideration of the effect of temperature history on the elastic modulus and tensile strength of hardening concrete and the connection stiffness of studs are the keys to accurately calculate the hydration heat temperature effect of composite girder. Three temperature action patterns, including uniform temperature, positive and negative temperature gradients, are generally taken into consideration on the composite girder bridge in the operation environment. The specifications of temperature action patterns and values of composite girder bridges are not coincident due to the differences in climate environments and research histories in different countries. Additionally, the temperature gradients are not obtained based on the statistical analysis and the existing historical meteorological data resources are not fully utilized. The temperature effect calculations of composite girder bridges are mostly based on the finite element numerical simulation. The analytical calculation methods for solving the temperature effect of composite girders are also improved, from taking no account of the interfacial slip and simple steel-concrete uniform temperature difference to considering the interfacial slip and arbitrary temperature distribution of steel and concrete. However, the theoretical model for solving the temperature effect of composite girder with arbitrary boundaries should be strengthened. The future research directions of composite girder bridge temperature problem should focus on the composite girder temperature action pattern based on effect classification, the in-depth understanding the temperature self-generated and secondary effects from the mechanism, and strengthening the long-term temperature measurement to determine the representative values of temperature actions by statistical analysis, as well as fully using the historical meteorological data of the meteorological departments in various regions of China to study the regional differences of the temperature action values. |
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