火灾情况下钢筋混凝土构件可有不同的受热面 ,其力学性能的差别很大。通过恒温加载试验比较了两面和三面高温下钢筋混凝土压弯柱的各种性能 ,包括截面温度场、变形和极限承载力等。进一步揭示了不同温度场对钢筋混凝土构件性能的影响 ,为结构的高温理论分析提供了依据 In case of fire, the reinforced concrete members may have different heated surfaces, and their mechanical properties vary greatly. Through the thermostatic loading test, the performances of the reinforced concrete columns under two and three temperatures are compared, including the temperature field, the deformation and the ultimate bearing capacity. Further reveals the different temperature field on the performance of reinforced concrete members, provides a basis for the theoretical analysis of the structure of high temperature