钢-混凝土组合梁桥温度场与温度效应研究综述

组合结构桥梁由热工性能差异显著的钢材和混凝土构成，温度效应往往成为控制其设计和应用的关键因素，因此，对其温度场和温度效应进行准确地计算与评估具有重要的科研价值与工程意义。对组合结构桥梁温度场与温度效应开展了综述研究。首先，对各国桥梁规范温度荷载的规定进行归纳对比，讨论不同规范中温度荷载计算方法的特点，总结中国现有规范对全国气候划分的分辨率不足、对日照辐射的考虑不够完善等有待提升之处；其次，对国内外桥梁温度场与温度效应研究的发展与现状进行调研，重点分析中国钢-混凝土组合结构桥梁温度场与温度效应的研究进展，对现有研究的不足进行讨论；再次，提出基于可靠度理论的组合结构桥梁设计温度荷载模型，可使用气象部门统计的温度统计资料，通过MATLAB高效数值模型计算形成组合结构桥梁温度场时程数据，进一步利用极值模型获得桥梁设计的温度荷载代表值，快速、高效地实现对桥梁地理信息、结构参数等因素的考虑；最后，以北京地区典型3跨连续直线组合梁桥为算例，对连续钢-混凝土组合桥梁的温度效应展开研究。提出的基于可靠度理论与MATLAB的钢-混凝土组合结构桥梁设计温度荷载模型，可实现任意地区组合结构桥梁温度场的精确计算并显著提升计算效率。

Review of Temperature Distribution and Temperature Effects of Steel-concrete Composite Girder Bridges in China

Composite bridges are composed of steel and concrete,which show significant differences in thermal performance. Temperature effects are often a major factor in controlling the design and application of composite bridges. Therefore, it is of great research value and engineering significance to conduct analysis on the temperature distribution and temperature effects of composite bridges. Thus, this study reviews the temperature distribution and temperature effects of composite bridges. First, the contents of the temperature loading of bridge codes for multiple countries are summarized and compared. Features related to the temperature load calculation method in different codes are discussed. The problems of insufficient resolution of national climate classification and insufficient consideration of solar radiation in China's existing codes are also examined. Second, the development and current status of research on bridge temperature loading and temperature effects at home and abroad are fully investigated. The progress of research on temperature loading and temperature effects of domestic steel-concrete composite bridges is analyzed. Third, a temperature distribution model for the design of composite bridges based on the reliability theory is proposed. Temperature statistics from a meteorological department can be used to calculate the time-history data of a bridge structure's temperature field through an efficient numerical model of MATLAB. The design representative temperature load of the bridge is further obtained using the extreme value model. The proposed method can consider bridge geographic information, structural parameters, and other factors quickly and efficiently. Finally, the temperature effects of continuous steel-concrete composite bridges are studied based on an investigation of a typical three-span continuous straight composite beam bridge in Beijing. The temperature distribution model based on reliability theory and MATLAB for the design of steel-concrete composite bridges as proposed in this study can accurately calculate the temperature field of a composite structure bridge in any area and significantly improve the calculation efficiency.