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中文摘要：
结构的高温性能与抗火设计是工程设计中应解决的关键技术问题之一，对确保火灾下人民生命财产安全至关重要。对于以钢管混凝土柱、组合扁梁以及钢一混凝土组合楼板等为代表的钢一混凝土组合结构构件，由于截面构成相对复杂，致使其温度场分析以及后续的高温性能分析具有较强的特殊性。已有的针对组合结构构件的温度场分析模型中，多数研究者忽略或仅间接考虑钢与混凝土界面的接触热阻，使其分析结果无法反映组合构件这类具有复合接触界面的多梯度温度分布特性，其对温度值的预测也随之偏离实际情况。为此，针对钢管混凝土柱、组合扁梁以及钢一混凝土组合楼板3类组合结构构件，总结分析了有关考虑接触热阻的温度场分析模型，并结合作者的相关研究成果，重点讨论了如何在温度场分析模型中有效考虑界面上接触热阻，以及接触热阻对组合结构截面温度场的影响，为科学评价组合结构的抗火性能提供前提与基础。
英文摘要：
Structural Fire resistant behaviour and design is one of key technologies in the design of constructions and is issue to life safety and property insurance in fire conditions. To composite structural elements in the forms of concrete-filled steel tubes, steel-decked composite floor slabs and slim floor beams, the temperature distribution analysis and the subsequent fire resistant behaviour research are particular for their relatively complex of composi- tion of cross sections. Many models to predict the response of composite structures in fire have been developed. One of the major drawbacks for these models is ignoring the effect of thermal contact resistance at the steel-concrete interfaces, and the analysis resuhs can not reflect the feature of poly-gradient of temperature distribution and pre- dictions of temperature are deviated from those of true values. Using the collected models considering the contact thermal resistance and the research results of the authors, the method that how to consider the thermal contact re- sistance was improved and the influence of thermal contact resistance on the temperatures of composite cross sec- tions was analyzed. The work may provide reference and basis for the further research on the fire resistance behav- iour of composite structures.
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