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为探究剪力连接程度对预应力钢-混凝土连续组合梁的荷载-跨中挠度特征、沿梁纵向的相对滑移分布规律、沿截面高度的应变分布、预应力增量变化以及连续梁的内力重分布过程、破坏机理与极限强度等的影响,进行了4根预应力钢-混凝土连续组合梁的静载全过程试验研究。研究结果表明,随着剪力连接程度的降低,变形及界面滑移明显增大,承载能力有所降低,但降低程度小于剪力连接的降低程度,2根剪力连接程度系数为0.7的组合梁承载力比完全剪力连接组合梁均降低不到10%,随着剪力连接程度的降低连续梁相应弯矩的调幅值也会降低。
In order to investigate the load-span mid-span deflection characteristics of prestressed steel-concrete continuous composite beams, the relative slip distribution along the longitudinal direction of beams, the strain distribution along the cross-section height, the increment of prestress and the internal force of continuous beams Redistribution process, failure mechanism and the ultimate strength of the four prestressed steel-concrete composite beams of the static load the whole process of experimental study. The results show that with the decrease of the shear connection, the deformation and interface slip obviously increase and the bearing capacity decreases, but the reduction degree is less than that of the shear connection. The combination of two shear connection degree coefficients is 0.7 The beam bearing capacity is less than 10% lower than that of a fully shearing composite beam. As the shear connection decreases, the amplitude of the corresponding bending moment of the continuous beam will also decrease.