预制装配式地铁车站闭腔构造优化设计

Optimum Design of Closed Cavity Structure for Prefabricated Metro Station

为了解决装配式地铁车站构件自重偏大的问题,以长春地铁某全国首例全预制装配式地铁车站为工程背景,基于大型通用有限元软件ABAQUS对装配式地铁车站闭腔构造开展优化设计研究.通过整体(单环)和分块(各构件)两方面分析,提出一系列闭腔构造优化措施.有限元数值仿真对比试验显示:优化闭腔构造后,单环结构在自重下各项性能无实质性改变,各项监测指标值远小于规范限值;结构自重降低 18.5%,结构内力有不同程度降低,对弯矩影响最大,对剪力次之,对轴力最小,其趋势对结构有利.试验验证了闭腔构造结构的安全性与可靠性.

To solve the problem of heavy weight of assembled metro station components, based on the engineering background of the first all-prefabricated metro station in Changchun Metro, the optimization design of the closed cavity structure of an assembled metro station was carried out based on the large-scale finite element software ABAQUS. Through the analysis of the whole (single ring) and the block (each component), a series of optimization measures for the closed cavity structure were put forward. Finite element numerical simulation contrast test shows: after the optimization of the closed cavity structure, the single ring structure had no substantial changes in its performance under the self-weight, and the value of each monitoring index was far less than the specification limit. The structural weight decreased by 18.5%, and the internal forces of the structure were reduced to different extents. The effect on the bending moment was the greatest, the shear force was the second, and the axial force was the smallest. Its trend was beneficial to the structure. The test verified the safety and reliability of the closed cavity structure.