基于弹性地基梁法的不同悬挑长度对闸室底板内力影响研究

Study the influence of different cantilever length on internal force of gate chamber base slab based on elastic foundation beam method

将闸室结构简化为作用在地基上的框架结构,通过对框架结构地基梁单元的细分,采用弹性地基梁法计算完建期工况和蓄水期工况下,闸室底板不设置悬挑和设置不同长度的悬挑时闸室底板内力,得到设置悬挑时可明显降低闸室底板弯矩、剪力和地基反力值,且随着悬挑长度的加大,弯矩、剪力和地基反力值的减小量近似趋于稳定值的结论。

The structure of gate chamber is simplified into a frame structure acting on the foundation.By subdividing the foundation beam element of the frame structure,the elastic foundation beam method was adopted to calculate the internal force of gate chamber base slab without cantilever and with cantilevers of different lengths under operating conditions in construction completion period and impounding period.The results of calculation demonstrate the setting of cantilever is able to significantly reduce the bending moment,shear force and foundation reaction force values of base slab;and the reduction of bending moment,shear force and foundation reaction force values tend to be stable with the increase of cantilever length.