基于结构力学求解器的地下综合管廊节点理论分析和数值模拟
Theoretical Analysis and Numerical Simulation of Underground Utility Tunnel Nodes Based on Structural Mechanics Solver
在地下综合管廊的设计和施工过程中,节点是管廊结构中的关键部位。本文以郑州某地下综合管廊区间为研究对象,采用理论分析和数值模拟的方法,探究地下综合管廊各个节点的受力和变形情况。首先将该区间简化为三跨非对称框架结构,基于结构力学求解器对管廊节点进行荷载计算,得出其弯矩、剪力以及轴力图,然后利用Flac3D软件对该地下综合管廊进行数值模拟及受力状态分析。研究结果表明:理论计算结果与数值模拟结果基本吻合,且基于朗肯主动土压力的侧向土压力较数值模拟结果偏小,建议对地下综合管廊进行内力和变形分析时采用静止土压力;三跨非对称框架在受到土层自重和侧向土压力时,所受到的弯矩大致呈对称分布,且顶板两侧的最大弯矩会随着跨度的增加而增加。
In the design and construction process of underground utility tunnel, nodes are key parts of the utility tunnel structure.This article takes the section of an underground utility tunnel in Zhengzhou as the research object, and uses theoretical analysis and numerical simulation methods to explore the stress and deformation of each node in the underground utility tunnel.Firstly, the interval is simplified into a three span asymmetric frame structure. Based on the structural mechanics solver, the load calculation of the utility tunnel nodes is carried out to obtain their bending moment, shear force, and axial force diagram. Then, Flac3D software is used to numerically simulate and analyze the stress state of the underground utility tunnel.The research results show that the theoretical calculation results are basically consistent with the numerical simulation results, and the lateral soil pressure based on Rankine's active soil pressure is smaller than the numerical simulation results. It is recommended to use static soil pressure for internal force and deformation analysis of underground utility tunnel; When a three span asymmetric frame is subjected to soil self weight and lateral soil pressure, the bending moments it experiences are roughly symmetrically distributed, and the maximum bending moment on both sides of the roof increases with the span.
地下综合管廊 / 理论分析 / Flac3D / 结构力学求解器
underground utility tunnel / theoretical analysis / Flac3D / structural mechanics solver
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