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通过7个小跨高比钢板-混凝土组合连梁试件的拟静力试验,研究了连梁跨高比、钢板配钢率以及楼板等因素对其抗震性能的影响,分析了连梁的破坏过程、破坏形态、承载能力、变形能力和耗能能力等。结果表明:相比于不考虑楼板小跨高比PRC连梁,考虑楼板小跨高比PRC连梁增大了连梁的开裂位移,显著提高了连梁的受剪承载力和耗能能力,考虑楼板连梁试件相比于不考虑楼板连梁试件受剪承载力提高了18.03%,破坏时对应的累积耗能是后者的1.66倍;连梁钢板的破坏包括梁墙交界区钢板的开裂和钢板的局部屈曲,钢板的局部屈曲可分为钢板边缘发生的受压局部屈曲和钢腹板的剪切局部屈曲;小跨高比PRC连梁试件的剪压比实测值为0.20~0.30,相应的剪压比设计值为0.39~0.59,内嵌钢板显著提高了小跨高比连梁的剪压比限值。
Through quasi-static tests of seven small-span steel-concrete composite beam specimens, the influence of the beam-span ratio, the steel ratio and the slab on the seismic performance was studied. Process, damage form, carrying capacity, deformation capacity and energy consumption capacity. The results show that compared with PRC beams without considering the small span ratio of PRC floor, considering the small span ratio of the floor of the PRC, the cracking of the connecting beam increases the shear displacement and the shear capacity and energy dissipation of the coupled beam. Considering that the load-bearing capacity of beams with floor slab increased by 18.03% compared with that without considering slab beams, the corresponding cumulative energy consumption when destroyed was 1.66 times that of the latter; The local buckling of the steel plate can be divided into the local buckling under compression and the shear buckling of the steel web at the edge of the steel plate. ~ 0.30, and the corresponding design value of shear pressure ratio is 0.39 ~ 0.59. The inline steel plate significantly improves the shear-pressure ratio of the beam with small span ratio.