部分充填式钢箱-混凝土连续组合梁刚度分析

为探讨部分充填式窄幅钢箱-混凝土连续组合梁的变形情况,设计3片不同抗剪连接度的试验梁,并进行单调加载实验.考虑边界条件对刚度的影响,结合组合系数法,推导出适合部分充填式钢箱-混凝土连续组合梁的刚度计算式.理论分析与试验结果表明:在钢箱-混凝土连续组合梁的钢箱中部分充填混凝土可以提高梁体的刚度,当钢箱-混凝土连续组合梁的钢箱中充填60%的混凝土时,其刚度提高最明显,最为合适.

Stiffness Analysis of Partially Filled Steel Box-Concrete Continuous Composite Beam

In order to investigate the deformation of partially filled steel box-concrete continuous composite beam, three groups of test beams with different shear connection were set up for monotonic loading. Considering the influence of boundary conditions on the stiffness and combining with the combination coefficient method, the stiffness calculation formula suitable for the steel box-concrete composite continuous beam was deduced. Theoretical analysis and experimental results show that partial filling of concrete in the beam can improve the stiffness of the beam, and under 60% of concrete filling, the effect of stiffness improvement is the most obvious and most appropriate.