X形钢箱系杆拱人行桥设计  

Design of X-Shaped Steel Box Tied Arch Pedestrian Bridge

作　　者：陈小涛 CHEN Xiao-tao(Hunan Architectural Design Institute Group Co.,Ltd.,Changsha 410012,China)

机构地区：[1]湖南省建筑设计院集团有限公司,湖南长沙410012

出　　处：《中国市政工程》2022年第1期4-7,118,共5页China Municipal Engineering

摘　　要：在分析现有十字路口人行过街方式的基础上,提出X形钢箱系杆拱人行桥方案。天桥主结构由系杆拱与相交梁两大部分组成,两段相交梁刚接于系杆跨中,平面为X形。通过杆系模型与实体模型对结构的静力指标、吊杆换索、自振频率、屈曲系数和拱脚局部受力进行分析。分析结果表明,刚性系杆刚性拱面内刚度较大,相交梁刚接在系杆跨中的方式可行,其他十字路口可通过调整跨径、梁高与X形的交角来满足工程需求。Based on the analysis of the existing pedestrian crossing modes at intersections,the scheme of X-shaped steel box tied arch pedestrian bridge is proposed.The main structure of the overpass is composed of tie bar arch & intersecting beam.The two intersecting beams are just connected to the middle of the tie bar span,and the plane is X-shaped.Through the bar model & solid model,the static index of the structural form,suspender cable replacement,natural vibration frequency,buckling coefficient& local stress of the arch foot are analyzed.The analysis results show that the rigidity in the rigid arch plane of the rigid tie bar is large,and the way of rigid connection of the intersecting beam in the tie bar span is feasible.Other intersections can meet the engineering needs by adjusting the intersection angle of span,beam height &X-shape.

关 键 词：十字交叉口 X形系杆拱 人行桥 有限元分析 

分 类 号：U448.225[建筑科学—桥梁与隧道工程]