铁道标准设计2025，Vol.69Issue(10)：78-86,9.DOI:10.13238/j.issn.1004-2954.202506230006
深惠城际铁路地下车站大跨度型钢混凝土组合拱形梁结构设计研究
Research on Structural Design of Large-Span Steel-Reinforced Concrete Composite Arch Beams for Underground Stations of Shenzhen-Huizhou Intercity Railway
摘要
Abstract
To realize the architectural function of large-span permeability in underground stations of intercity railways,the 28 m large-span steel-reinforced concrete composite arch beam at the central axis of the concourse of Xili Station on the Shenzhen-Huizhou intercity railway was selected as the research object,and a novel structural system and design method applicable to the top beam of the main framework of underground stations were proposed.Six 3D finite-element models were established for numerical simulation,including steel-reinforced concrete composite arch beams with arch heights of 0.5,1,1.5,2 m,and 2.5m,as well as a straight beam,and the study was carried out from aspects such as the mechanical characteristics of the arch beam structure and beam-column joints.The comparative calculation and analysis results showed that with the increase of arch height of the steel-reinforced concrete composite arch beam,the mid-span bending moment,support bending moment,support shear force,and maximum deflection all decreased in a linear manner.When the arch height exceeded 1 m,the reduction in internal force values and deformation values was most significant,with the reduction rate being about 1.5 times that for an arch height in the range of 0.5～1 m.At Xili Station,a design using a steel-reinforced concrete composite arch beam of 1.5 m arch height was adopted.The large-span top slab was smoothly connected with the same camber on both sides of the arch beam.Under the same vertical load,compared with a straight beam,the mid-span bending moment,support bending moment,and support shear force of the beam under the basic combination were reduced by 24.30％,15.78％,and 23.61％,respectively.The maximum mid-span deflection under the standard combination was reduced by 16.45％.The mid-span bending moment and support bending moment of the arched top slab under the basic combination were reduced by 44.17％and 39.19％,respectively,compared with a straight top slab.The arch beam,through the mechanical characteristics of its arch structure,can effectively control the deflection of the beam and reduce its bending moment and shear force.Meanwhile,the large-span top slab,by sharing the same arch with the arch beam and jointly bearing the load,optimizes its own structural dimensions and reinforcement.This has practical significance for saving project investment and realizing the large-span and permeable structural design of Xili Station.关键词
城际铁路/地下车站/型钢混凝土组合拱形梁/受力特性/梁柱节点Key words
intercity railway/underground station/steel-reinforced concrete composite arch beam/mechanical characteristics/beam-column joint分类
交通工程引用本文复制引用
刘子阳,邬泽,黄杰,刘洋..深惠城际铁路地下车站大跨度型钢混凝土组合拱形梁结构设计研究[J].铁道标准设计,2025,69(10):78-86,9.基金项目
中铁工程设计咨询集团有限公司科技开发课题(研2021-12) （研2021-12）
