承插式管廊接头位移和应力分析

Analysis of Displacement and Stress of Deformation Joint of Underground Utility Tunnel

为研究现浇地下综合管廊接头处在受力情况下的位移及应力分布规律,选取管廊承插式接头为代表,利用非线性有限元软件ABAQUS建立土-地下综合管廊结构数值模型,采用非线性弹簧单元模拟管廊承插式接头,并将管廊节点划分实体单元。通过提取顶板和侧壁板截面节点的变形量,分析廊体及接头处节点发生位移的变化规律,并根据接头处在受力时的应力云图,得到接口节点的应力集中区域。

For the study of displacement and stress distribution of the deformation joint of underground utility tunnel under the action of force,the authors selected the bell and spigot joint deformation seam of cast-in-place tunnel as representative,used ABAQUS finite element analysis software to establish the numerical model of soil underground utility tunnel,and used nonlinear spring element to simulate the bell and spigot joint deformation seam of cast-in-place tunnel and dividing the gallery somite point and entity unit. By extracting the deformation of the cross section of the roof and side panels,analyzed the changing law of the gallery body and displacement interface nodes surrounding,and according to deformation joint in the force at the time of the stress nephogram,got the interface node stress concentration area.