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在两榀预应力型钢混凝土框架竖向静力试验的基础上,提出两种考虑侧向约束影响的预应力型钢混凝土框架梁正截面受弯承载力的计算方法:基于塑性理论下限定理的改进“一般叠加法”和基于《混凝土结构设计规范》基本假定的正截面承载力计算方法。两种方法计算结果与试验误差基本在10%以内,吻合较好,说明所建议方法的理论依据是可靠的,可用于工程设计,为《预应力混凝土设计规范》的编制提供参考。
Based on the vertical static tests of two prestressed steel reinforced concrete (CFST) frames, two calculation methods of flexural bearing capacity of prestressed SRC beams considering the influence of lateral restraint are proposed: the improvement based on the lower bound theorem of plasticity theory, “General Superposition Law” and the calculation method of the normal section bearing capacity based on the basic assumptions of “Code for Design of Concrete Structure”. The calculated results and experimental errors of the two methods are basically within 10%, which is in good agreement with each other, indicating that the theoretical basis of the proposed method is reliable and can be used in engineering design, providing a reference for the preparation of “Prestressed Concrete Design Code”.