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基于塑性理论下限定理提出了T形配钢型钢混凝土构件在压、弯复合受力状态下的正截面承载力计算方法。将正截面承载力分为混凝土部分、钢筋部分和型钢部分,分析得出各部分的承载力方程,采用叠加强度法建立了T型配钢型钢混凝土构件的N-M相关曲线,并给出了相应计算公式。进行了5个1/2比例T形配钢型钢混凝土柱的低周反复加载试验,对是否配置拉结筋、不同配箍率和不同轴压力下的受力特点、破坏形态、承载能力进行了研究,其中4个试件发生了正截面受弯破坏,部分计算结果与试验数据符合较好。结果表明,所提出的计算方法简单易行,可供实际工程设计参考。
Based on the lower bound theorem of plasticity theory, a method for calculating the normal section bearing capacity of T-shaped steel reinforced concrete members subjected to compressive and flexural stresses is proposed. The bearing capacity of normal section is divided into concrete section, steel section and section steel section. The bearing capacity equation of each section is analyzed. The NM correlation curve of T-type steel reinforced concrete member is established by superposition strength method, and the corresponding calculation formula. Low-cycle repeated loading tests of 5 1/2 T-shape steel reinforced concrete columns were carried out. The mechanical properties of the steel bars under different tie-in rates and different axial pressures, failure modes and carrying capacity were investigated The study, of which four specimens occurred in the right section of the bending failure, some calculated results and experimental data in good agreement. The results show that the proposed calculation method is simple and easy to use, which can be used for practical engineering design reference.