丰台站SRC承轨梁结构设计  

Design of the SRC Track Beam of Fengtai Railway Station

作　　者：刘晨 唐虎 米宏广 白红刚 龚少炜 李义龙 叶昌杰 Liu Chen;Tang Hu;Mi Hongguang;Bai Honggang;Gong Shaowei;Li Yilong;Ye Changjie(China Railway Design Corporation,Tianjin 300308,China;China Academy of Building Research,Beijing 100013,China;National Engineering Research Center of Building Technology,Beijing 100013,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308 [2]中国建筑科学研究院有限公司,北京100013 [3]国家建筑工程技术研究中心,北京100013

出　　处：《建筑科学》2020年第9期190-196,共7页Building Science

基　　金：北京丰台站双层车场及站房高架结构建造技术研究(K2018G016),中国国家铁路集团有限公司重大课题。

摘　　要：型钢混凝土组合结构以其高强的承载性能以及优越的防火、防腐能力越来越受到工程领域的重视,其应用也从静力结构拓展到承受疲劳荷载作用的结构,如公路、铁路、桥梁等。本文依托于正在建设的丰台铁路大型综合枢纽项目,采用通用有限元分析软件MIDAS,对SRC承轨梁的承载力、疲劳强度进行了分析。结果表明:在设计荷载作用下,SRC承轨梁各组件(混凝土、纵向钢筋、箍筋、型钢)应力水平均低于相应的容许应力限值,梁内型钢、钢筋应力幅亦低于相应的容许应力幅限值,满足设计预期。Nowadays the steel reinforced concrete(SRC)composite structure is more and more frequently employed in engineering projects due to their high load capacity and outstanding performance under fire and corrosion.The use of SRC structures is not only limited in structures dominated by static loads but also extended to the structures subject to fatigue loads,for instance,highways,railways,bridges and etc.Taking Fengtai Railway Station,which is at the stage of construction,as the research background,using allowable stress method,with the aid of general finite element software-MIDAS,the bearing capacity and fatigue strength of the SRC track beam are analyzed.The results indicate that under the design load,the stresses of the components(concrete,longitudinal steel bar,stirrup,structural steel)in SRC track beam are lower than the corresponding value of allowable stress,the stress amplitudes of structural steel and steel rebar in beam are lower than allowable stress amplitude,it can meet the requirement of expected design.

关 键 词：SRC承轨梁 疲劳 承载力 应力幅 

分 类 号：TU248.1[建筑科学—建筑设计及理论]