Structural Selection and Stress Analysis of Suzhou Rail Transit Column-free Stations

Abstract

Objective In urban rail transit stations, a column-free structure is often adopted to create a spacious visual effect when the site is narrow or there is excess height. To achieve the goal of safety, reliability, and economic feasibility, it is necessary to conduct structural selection and stress analysis for such column-free stations. Method Based on the Shijiaqiao Station project of Suzhou Rail Transit Line 8, finite element calculation method is employed to thoroughly examine the stress characteristics of the station top, middle, and bottom slabs when different structural forms are used. An overall structural scheme for the station is proposed accordingly. Result & Conclusion A fully arched top slab offers the best stress performance and economic efficiency for column-free stations. Setting up a row of columns on station platform level improves the stress distribution on the middle slab and facilitates the installation of stairway openings. The fully arched form is also optimal for the bottom slab considering stress and economic efficiency. However, for construction convenience and deformation control requirements, a flat-bottom arch form can also be used. This station employs a structure form of column-free arched top slab + beam-column middle slab + flat-bottom arched bottom slab. This design fully leverages the stress characteristics of arched structures, enhances the spacious visual effect of station interior public area by utilizing the excess height while maintaining a reasonable construction cost.

Keywords

• urban rail transit
• column-free station
• structural selection
• stress