车辆荷载作用下公路混凝土桥梁疲劳问题研究进展  

Research progress on fatigue of highway concrete bridges under vehicle loading

作　　者：张劲泉 宋紫薇[1] 韩冰[1] 解会兵[1] 李鹏飞 Zhang Jinquan;Song Ziwei;Han Bing;Xie Huibing;Li Pengfei(Beijing Jiaotong University,Beijing 100044,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China)

机构地区：[1]北京交通大学,北京100044 [2]交通运输部公路科学研究院,北京100088

出　　处：《土木工程学报》2022年第12期65-79,共15页China Civil Engineering Journal

基　　金：国家自然科学基金(51678030,51708020);中央级公益性科研院所基本科研业务费专项资金项目(2019-0107)。

摘　　要：随重载作用及交通量逐渐上升,混凝土桥梁的疲劳问题逐渐凸显。为明确混凝土桥梁运营期疲劳损伤过程,系统梳理混凝土桥梁疲劳问题的研究现状,讨论混凝土桥梁疲劳问题成因,重点分析组成材料疲劳特性及疲劳车辆荷载形式,并对混凝土桥梁疲劳问题未来发展趋势进行探讨。结果表明:混凝土桥梁疲劳问题具有多尺度、离散性强的特征,其疲劳破坏成因、裂纹扩展规律、疲劳破坏模式等均较为复杂。后续研究中,一方面应深入探究钢筋混凝土桥梁的疲劳性能,从本质上揭示损伤演化机理,建立反映疲劳物理机制的演化模型;另一方面,应结合交通流特征,以混凝土桥梁疲劳力学响应为基础,建立适用于混凝土桥梁的疲劳车辆模型,为混凝土桥梁疲劳设计及评估提供参考。With the increase in traffic volume and the proportion of heavy traffic load, the fatigue problem of concrete bridge has gradually become prominent.To clarify the fatigue damage process of concrete bridges during operation, the research progress on the fatigue performance of concrete bridges was systematically reviewed.The causes of concrete fatigue problems of bridges were explored.The fatigue properties of the bridge materials and fatigue vehicle load patterns were analyzed particularly.The future research and development direction of fatigue problem of concrete bridges were discussed.The results show that the fatigue problem of concrete bridges has the characteristics of multi-scale and large discreteness.The causes of fatigue failure, crack propagation laws, and fatigue failure modes are relatively complex.For future research, on the one hand, the fatigue performance of reinforced concrete bridges needs to be deeply explored, the damage evolution mechanism needs to be revealed, and the evolution model reflecting the fatigue physical mechanism needs to be established.On the other hand, combined with the characteristics of traffic stream, based on the fatigue mechanical response of concrete bridges, a fatigue vehicle model suitable for concrete bridges needs to be established to provide a reference for the fatigue design and evaluation of concrete bridges.

关 键 词：混凝土桥梁 综述 疲劳性能 疲劳车辆荷载 

分 类 号：U444[建筑科学—桥梁与隧道工程]