SRC截面系梁系杆拱桥拱脚局部应力分析  

Analysis on the Local Stress of the Arch Foot of Tied Arch Bridge with SRC Section Binder

作　　者：罗浚滔 LUO Juntao(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,Sichuan,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《工程技术研究》2024年第10期16-19,共4页Engineering and Technological Research

摘　　要：钢骨钢筋混凝土构造(SRC)截面梁在系杆拱桥中的应用尚无先例,其拱脚处更是因各种构件在此交会,受力情况复杂。为探究拱脚部位的应力分布,文章采用有限元软件Midas Civil,对某跨径为68 m的采用SRC截面系梁的系杆拱桥建立全桥模型,分析了施工阶段及运营阶段的最不利荷载工况,提取相应的截面内力值,再采用ANSYS软件建立拱脚局部模型,通过分析局部应力分布规律,指出了施工及运营阶段钢与混凝土结构的最不利位置,并提出相应的建议,以改善拱脚的受力状态。同时,由应力分析结果揭示了该类特殊桥型的传力途径。There is no precedent for the application of steel reinforced concrete(SRC)section beams in tied arch bridge,and the stress situation at the arch foot is complex due to the intersection of various components.In order to explore the stress distribution at the arch foot,the finite element software Midas Civil is used to establish a fullbridge model of a tied arch bridge with SRC section binders with a span of 68 m.The most unfavorable load conditions in the construction stage and the operation stage are analyzed,and the corresponding section internal force values are extracted.Then,the ANSYS software is used to establish the local model of the arch foot.By analyzing the local stress distribution law,the most unfavorable position of the steel and concrete structure in the construction and operation stages is pointed out,and the corresponding suggestions are put forward to improve the stress state of the arch foot.At the same time,the stress analysis results reveal the force transmission path of this special bridge type.

关 键 词：SRC截面系梁 系杆拱桥 拱脚应力 有限元分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]