摘要
波形钢腹板组合箱梁从根本上回避了一般预应力混凝土箱梁桥腹板开裂病害问题,合理地将钢、混凝土两种材料结合,改善结构力学性能并减轻结构自重,理论上波形钢腹板梁桥可以超过混凝土腹板梁桥达到更大的跨度。由于梁桥中墩墩顶处负弯矩承载力有限,通过负弯矩对比的方式,试设计主跨360 m的波形钢腹板组合梁桥,并建立有限元模型,对结构抗弯、抗剪承载力,以及连接件等进行计算,结果表明试设计方案是成立的。钢腹板整体屈曲稳定性是制约波形钢腹板梁桥跨径增大的主要因素之一。为解决现有的波形钢腹板型号应用在大跨度梁桥中整体屈曲强度折减较严重的问题,研究设置纵向横隔和采用大尺寸波形钢腹板型号的应对措施,从而为波形钢腹板梁桥向更大跨度发展做出积极探索。
The corrugated steel web composite box girder fundamentally avoids the crack problem of web of prestressed concrete box girder bridge,and reasonably combines two materials of steel and concrete to improve the structural mechanical properties and reduce the structural self-weight.In theory,the corrugated steel web girder bridge can reach a larger span than the concrete web girder bridge.Due to the limited bearing capacity of the negative bending moment at the top of the middle pier of the beam bridge,the waveform steel web composite beam bridge with a main span of 360 m is designed by means of the negative bending moment comparison,and the finite element model is established to calculate the structural bending resistance,shear capacity and connecting parts.The result shows that the trial design scheme is feasible.The overall buckling stability of steel web is one of the main factors restricting the span increment of corrugated steel web girder bridge.In order to solve the serious reduction of the overall buckling strength of the existing corrugated steel webs applied in the long-span girder bridge,this paper studies the countermeasures of setting up the longitudinal transverse partition and using the large-sized corrugated steel web so as to make a positive exploration for the longer-span development of corrugated steel web girder bridge.
作者
代亮
王梦雨
何晓晖
于芳
Dai Liang;Wang Mengyu;He Xiaohui;Yu Fang
出处
《城市道桥与防洪》
2020年第2期49-53,M0008,共6页
Urban Roads Bridges & Flood Control
关键词
波形钢腹板
试设计
屈曲稳定性
大跨径梁桥
组合结构
corrugated steel web
trial design
buckling stability
long-span girder bridge
composite structure
