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本文基于换算截面法,运用能量变分原理推导出箱型截面压弯构件在水平力为集中荷载作用下,考虑剪力滞影响与忽略剪力滞影响的构件变形计算公式。同时,对轴压比不同的三个构件进行了试验,通过对比试验结果,分析剪力滞效应对箱型压弯构件变形的影响。分析表明:剪力滞对箱型压弯构件变形影响显著,且理论计算与试验值吻合较好。所以,实际工程中应考虑剪力滞对箱型截面压弯构件的影响。
Based on the converted section method, the formula for calculating the deformation of members with box-section under the action of concentrated load is derived by using the energy variation principle. At the same time, three components with different axial compression ratios were tested. By comparing the experimental results, the influence of shear lag effect on the deformation of box-type bending members was analyzed. The analysis shows that shear lag has a significant effect on the deformation of box-type members, and the theoretical calculation is in good agreement with the experimental data. Therefore, the actual project should consider the impact of shear lag on box-section bending members.