南水北调中线沙河渡槽施工期三维有限元分析

Three-dimensional Finite Element Analysis on the Shahe Aqueduct Construction Period of South to North Water Diversion Project

本文主要是采用三维有限元技术,建立了大流量预应力矩形渡槽有限元模型,考虑结构自重、预应力、风载、水载对渡槽的影响,按水工混凝土结构设计规范(SL 191-2008)要求,对南水北调中线工程的沙河渡槽在合理工况组合下的施工期进行了仿真计算,得出控制点在各外载作用下的应力及变形结果,为预应力矩形渡槽施工期的设计提供一定的理论依据。

This paper mainly used three-dimensional finite element technique, established large flow finite element model of prestressed rectangular aqueduct, considering the impacts of the structural weight, prestress, wind load, wa- ter load on the aqueduct, according to the structural design specifications of hydraulic concrete, simulated and calcu- lated the construction period under reasonable working conditions combination of Shahe Aqueduct in South to North Water Diversion Project, stress and deformation results of the control point under the action of various external load- ing were obtained. It provided a theoretical basis for the design of prestressed rectangular aqueduct in construction period.