地下箱涵大开洞节点结构分析

以一个实际工程案例为背景,利用Midas/Civil软件,对3种通道交叉处开洞的处理方式(增设上翻梁和地梁、增设壁柱、不补偿但利用剩余结构局部加配钢筋来抵抗土体荷载效应)进行了分析。通过对板受力情况的改善、地基反力的调整、施工难易性以及经济性方面的比较,得出不补偿但利用剩余结构局部加配钢筋来处理厚板结构开洞是优选方式。

Analysis on Large Opening Node Structure of Underground Box Culvert

Based on a practical engineering case, Midas/Civil software is used to analyze three ways (adding the upturn beam and ground beam, adding the pilaster, and using the local reinforcement of the residual structure to resist the soil load effect without compensation) to deal with the opening at the intersection of channels. Through the improvement of slab stress condition, the adjustment of foundation reaction force, and the comparison of construction difficulty and economy, the optimization way of using the local reinforcement of the residual structure to deal with the opening of the thick plate structure without compensation is obtained.