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目前,钢管混凝土结构被大量应用和推广,但其剪切及扭转性能的研究都是从有限元分析或者试验出发,得出了回归公式或者经验公式,缺少纯理论上的指导。对钢管混凝土的抗扭承载力进行了理论研究,得到了抗扭承载力的理论计算公式;然后根据钢管混凝土“统一理论”的思想,得到了抗剪极限强度以及抗剪承载力的理论计算公式;最后与若干试验数据以及已有的研究成果进行了对比,证明了理论计算公式的可行性。
At present, the concrete-filled steel tubular structures are widely used and popularized. However, the researches on the shear and torsional properties of CFST structures all start from the finite element analysis or the experiment. The regression formulas or empirical formulas are obtained, which lacks the theoretical guidance. The theoretical calculation of the torsional load-bearing capacity of concrete-filled steel tube (CFST) has been carried out and the theoretical formula of torsional bearing capacity has been obtained. According to the theory of CFST “unified theory”, the theory of shear ultimate strength and shear strength Finally, it compares with some experimental data and the existing research results, and proves the feasibility of the theoretical calculation formula.