地下工程逆作法板柱节点设计及受力分析

Design and analysis of joint of slab-column of underground engineering by top-down method

针对地下工程采用逆作法施工时板柱节点结构形式的变化带来的受力问题,文章结合实际工程介绍了某地下工程逆作法的施工工艺和板柱节点的设计处理办法,运用有限元软件对无梁楼盖板柱节点处的环梁进行有限元模拟受力分析,验证了在板柱节点处应用环梁是安全可靠的,能有效的传递荷载、承受弯矩,同时对环梁下外包柱的强度进行了验算,最后对地下工程逆作法中其环梁的特点进行了总结.

According to the stress problem coming from change in the form of nodes of slab-column structure by Reversed Construction for underground engineering, in this paper, we introduce the construction technology of Reversed and the design approach of slab-column connections of an underground project, studying the stress of the ring beam with using finite element software. The paper verifies the reliability of the use of ring beam in the connections, checks the strength of the outsourcing column, anti summarizes the characteristics of the ring beam used in Reversed of underground engineering.