不同加腋厚度单仓管廊力学性能计算与数值分析

Calculation and Numerical Analysis of Mechanical Properties of Single Warehouse Utility Tunnel with Different Axillary Thickness

地下综合管廊端部性能是管廊整体工作的关键,在实际工程中常以加腋的形式增强端部性能.为研究不同腋脚高度的影响,在沈阳市管廊工程结构型式基础上设计了3种不同腋脚高度的单仓管廊模型.利用ABAQUS有限元软件进行不同结构型式的数值分析,得到3个模型的位移变化曲线、应力云图以及荷载-位移曲线,同时对模型的延性、开裂荷载及裂缝宽度等力学特性进行计算和讨论分析.得出:加腋形式提高了管廊的整体承载力与刚度并对管廊抗渗防水有利,为实际工程中管廊加腋厚度的确定提供理论参考.

The performance of the utility tunnel end is the key to ensure the overall work of the utility tunnel.In the actual project,the end performance is usually enhanced by adding axillary.In order to study the influence of different height of axillary;three kinds of single warehouse utility tunnel model with different axillary heights were designed on the basis of Shenyang utility tunnel project.Through the ABAQUS finite element software,the displacement curves,the Stress nephogram and the load-displacement curves of the three models are obtained,based on these,the mechanical properties of the model such as ductility,cracking load and crack width are calculated.The comprehensive analysis shows that the addition of axillary form improves the overall bearing capacity and rigidity of the utility tunnel and is beneficial to the anti-seepage and waterproof of the utility tunnel,which provides a theoretical reference for adding the axillary thickness of the utility tunnel in the actual project.