既有连续钢桁梁桥当重车过桥时结构性能的计算研究  

Calculation and Research of Structural Behaviors on Existing Continuous Steel Truss Bridge under Heavy Trailer Load

作　　者：许惟国[1] 范文理[1] 万中基 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省交通厅公路局,四川成都610041

出　　处：《兰州交通大学学报》2005年第6期20-23,共4页Journal of Lanzhou Jiaotong University

摘　　要：通过构造3D桁架及梁、板、块体单元计算模型,计算了既有连续钢桁梁桥———雅江大桥在重车过桥时结构杆件的应力和变形并验证了桥面板的抗裂性,结合分析和现场观察的结果共同表明:该桥通过大型施工车辆(总轴重限于550 kN以下)时,钢桁梁主桁杆件及联结的承载能力、结构的挠度以及钢筋混凝土桥面板的抗裂性均能满足现今有关公路桥涵设计规范的要求,结构安全可以保证.Stresses and deformations of Yajiang Bridge, an old continuous steel truss bridge when a heavy vehicle passes it are calculated and deck＇s crack resistance behavior is verified by building 3D space model including truss bar, beam, plate and brick elements. The analytical results and observational records in site show that when a large construction vehicle （total gross loads on axle are limited to 550kN and below） passes this bridge, load-carrying capacity of principal members and ties, deflections of the steel truss bridge as well as crack resistance performance of RC decks are suitable for the requirements of concerned code for design of highway bridges and culverts at present. So the bridge＇s safety can be ensured.

关 键 词：雅江大桥 连续钢桁梁桥 旧桥评估 有限元分析 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]