摘要
为了研究正交异性钢桥面的疲劳性能,根据新结构细部焊接工艺的研究成果和合理的结构参数,设计了足尺节段疲劳试验模型,通过足尺模型试验确定不同焊接工艺下各疲劳易损细节的实际疲劳抗力。铺装层作为钢桥面板之上的行车功能层,直接承担车辆轮载。分别设计了树脂沥青铺装和浇注式沥青铺装两种铺装结构,进行武汉市江汉七桥铺装层与正交异性钢桥面板协同受力体系的模型试验,并考虑温度的影响。研究结果表明:有铺装层的钢桥面板U肋与顶板构造细节,由于铺装层与钢桥面板的协同作用,其应力幅值相较于无铺装层时显著降低;该应力幅值随着铺装层温度的升高而增大。
In order to study the fatigue performance of orthotropic steel bridge decks,a full-scale segmental fatigue test model was designed based on the research results of the new structural details welding process and reasonable structural parameters.Through the full-scale model tests,the actual fatigue resistance of various fatigue vulnerable details under different welding processes was determined.The covering layer serves as the driving functional layer upon the steel bridge,directly supporting the wheel load.Two paving structures were designed including cork asphalt pavement and poured asphalt pavement.They were applied to simulate the synergistic stress system of the paving layer and orthogonal and anisotropic steel bridge slabs of Wuhan Jianghan Seventh Bridge,considering the effects of temperature.The results show that because of the synergistic effect of pavement layers and steel bridge decks,the stress amplitude of structural details of U-ribs and top plates of steel bridge decks with pavement layers is significantly lower than those without pavement layers.The stress amplitude increases with the temperature of the pavement layer.
作者
汪金辉
程菊科
蒋欣
谢瑛
WANG Jinhui;CHENG Juke;JIANG Xin;XIE Ying(China Railway Major Bridge Reconnaissance&Design Institute Co.Ltd.,Wuhan 430056,China;School of Civil Engineering,Hefei University of Technology,Hefei 230009,China;School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China;China Railway Bridge Co.Ltd.,Wuhan 430033,China)
出处
《铁道建筑》
北大核心
2024年第3期8-14,共7页
Railway Engineering
基金
湖北省自然科学基金(2022CFB256)。
关键词
正交异性钢桥面板
疲劳性能
足尺节段模型试验
U肋
铺装层
温度
orthotropic steel bridge deck
fatigue performance
full-scale segmental model test
U-rib
pavement layer
temperature
