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为了分析刚构-连续组合单箱室桥的剪力滞效应,以三股线刚构-连续组合桥为工程背景,利用空间有限元程序ANSYS建立箱梁空间网格模型,通过模型对剪力滞效应进行分析,最终得出空间网格法可以很好地分析刚构-连续单箱梁桥的成桥跨中、支点剪力滞效应;箱梁的剪力滞效应为:顶板的剪力滞效应较底板显著;剪力滞效应沿纵向是变化的,总体上边跨截面的剪力滞比跨中截面要突出,相关结论可为同类桥梁的设计和加固提供参考。
In order to analyze the shear lag effect of rigid-continuous single box-chamber bridge, the three-wire rigid frame-continuous composite bridge is taken as the engineering background. The spatial finite element program ANSYS is used to establish the box girder spatial grid model, and the shear lag It is concluded that the spatial grid method can well analyze the shear lag effect of the mid-span and the fulcrum of the rigid-continuous single box girder bridges. The shear lag effect of the box girder is that the shear lag of the roof The effect is more significant than that of the bottom plate. The shear lag effect varies along the longitudinal direction. Generally speaking, the shear hysteresis ratio of the cross-section of mid-span cross-section is prominent. The relevant conclusions can provide references for the design and reinforcement of similar bridges.