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介绍了7根箱形型钢混凝土梁和1根钢筋混凝土梁的纯扭试验,并对试验现象进行了描述。在此基础上根据混凝土、钢筋和型钢不同位置处的应变情况,详细分析了箱形型钢混凝土梁受扭过程中的力学性能;同时分析了不同型钢截面、不同配筋情况和箱形型钢内是否浇注混凝土等对型钢混凝土梁纯扭性能的影响。结果表明,加载过程中型钢与混凝土能协同工作;箱形型钢抗扭刚度和配箍率对箱形型钢混凝土梁的抗扭承载力有显著影响。
Pure torsional tests of seven box girders and one reinforced concrete beam are introduced and the phenomena of the test are described. On this basis, according to the strain of concrete, steel bar and section steel at different positions, the mechanical behavior of box girder reinforced concrete beam in torsional process was analyzed in detail. At the same time, the different sectional steel sections, Influence of pouring concrete on the pure torsion properties of SRC beams. The results show that the section steel and concrete can work together during the loading process. The torsional stiffness and the stirrup ratio of box beam have a significant effect on the torsional bearing capacity of box girder.