期刊论文

Fatigue characteristics of steel box girder based on measured vehicle flow

中文

长安大学学报(自然科学版)

1671-8879

2019

39

5

48-58

10.19721/j.cnki.1671-8879.2019.05.006

国家自然科学基金项目(51778069;51708047) 国家重点基础研究发展计划(“973”计划)项目(2015CB057701,2015CB057702) 广东省交通运输厅科技项目(201602010) 湖南省研究生科研创新项目(CX20190635) 桥梁工程安全控制教育部重点实验室开放基金项目(16BCX12)

本校为第一机构

为研究车流荷载作用下钢箱梁横隔板弧形切口处母材的疲劳特性,以佛山平胜大桥为背景工程,基于动态称重系统(WIM)监测数据,得到了该桥9种车型的疲劳荷载谱,运用ABAQUS建立了钢箱梁节段模型,计算了横隔板弧形切口处疲劳应力时程曲线。通过模型试验验证,得到了设计弧形切口的疲劳寿命和裂纹扩展规律。研究结果表明:该悬索桥疲劳车型可简化为V2~V10共9类,不同车道的同一车型轴重差异较大,3~#、4~#车道轴重普遍高于1~#、2~#、5~#车道,最大轴重为3~#车道的V10车型的Z3轴,重达151 kN;重车道(3~#、4~#车道)V2~V10车型的比例明显高于其他车道;轮轴作用下弧形切口处沿纵桥向的应力影响线较短,约3个横隔板间...

To study the fatigue properties of the base material at the arc incision of a steel box girder under traffic load, Foshan Pingsheng Bridge was used for the engineering background, and based on the monitoring data of the weigh-in-motion (WIM) system, the fatigue load spectrum of nine vehicle types of the bridge was obtained. A steel box girder segment model was established using ABAQUS, and the fatigue stress history curve of the arc incision of the transverse diaphragm was calculated. Validated by model tests, the fatigue life and crack propagation law of the design arc incision was obtained. ...