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提出考虑粘结滑移的型钢混凝土组合结构的有限元建模方法,通过对比计算结果与试验结果验证建模方法的准确性。对型钢高性能混凝土(SRHPC)框架结构进行试验,主要考虑的参数为轴压比、混凝土强度、含钢率以及型钢强度。探讨诸参数对SRHPC框架承载能力和变形能力的影响,分析结构的失效机理。结果表明,型钢强度是影响结构基本性能最主要的因素,结构的承载能力和变形能力均可通过提高型钢强度而有效增大。轴压力的存在会降低结构的变形能力,但当轴压比小于0.4,可在一定程度上提高结构承载力。当轴压比超过0.4以后,结构的峰值荷载和变形能力随轴压比的增大而降低,且结构的负刚度段的斜率逐渐增大。
The finite element modeling method of the SRC composite structure considering the bond slip is proposed. The accuracy of the modeling method is verified by comparing the calculated results with the experimental results. The SRHPC frame structure is tested. The main parameters considered are axial compression ratio, concrete strength, steel content and strength of the section steel. The influence of parameters on the bearing capacity and deformation capacity of SRHPC frame is discussed, and the failure mechanism of the structure is analyzed. The results show that the strength of the section steel is the most important factor affecting the basic performance of the structure. The bearing capacity and deformation capacity of the structure can be effectively increased by increasing the strength of the section steel. The existence of shaft pressure will reduce the deformation capacity of the structure, but when the axial compression ratio is less than 0.4, the bearing capacity of the structure can be improved to a certain extent. When the axial compression ratio exceeds 0.4, the peak load and deformation of the structure decrease with the increase of the axial compression ratio, and the slope of the negative stiffness section of the structure gradually increases.