顶板厚度对组合桥面板U肋与顶板构造疲劳性能的影响  

Effect of Plate Thickness on Fatigue Performance of Connection between Trough and Deck Plate in Steel-concrete Composite Bridge Deck

作　　者：江臣[1] 苏庆田[2] 郭赵元 周青 傅晨曦 JIANG Chen;SU Qingtian;GUO Zhaoyuan;ZHOU Qing;FU Chenxi(Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing 210004,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;China Design Group Co.,Ltd.,Nanjing 210014,China)

机构地区：[1]江苏省交通工程建设局,南京210004 [2]同济大学土木工程学院,上海200092 [3]华设设计集团有限公司,南京210014

出　　处：《结构工程师》2023年第4期26-34,共9页Structural Engineers

摘　　要：为研究钢顶板厚度对于正交异性组合桥面板U肋与顶板构造疲劳性能的影响,通过建立板壳-实体有限元模型,计算分析不同顶板厚度下正交异性钢桥面板中关键部位的受力情况。计算结果表明,有无刚性铺装对车轮荷载作用下的桥面板受力状态以及U肋与钢桥面板焊缝焊趾处应力大小有显著的不同,采用刚性铺装的正交异性组合桥面板U肋与钢桥面板焊缝焊趾处应力幅值只有不采用刚性铺装桥面板的8%;改变钢顶板的厚度对正交异性组合桥面板U肋与钢桥面板焊缝焊趾处的疲劳强度影响甚微,采用12 mm的钢顶板也能满足U肋与钢桥面板焊缝焊趾处的疲劳强度要求。In order to study the effect of deck plate thickness on fatigue performance of connection between trough and deck plate in steel-concrete composite bridge deck,a shell-solid finite element model was established to calculate and analyze the stress distribution in an orthotropic steel-concrete bridge deck with different thicknesses of deck plate.The results show that the presence or absence of rigid pavement has a significant effect on the stress state of the bridge deck as well as the stress at the weld toe between U-rib and steel plate under vehicle loading.The stress amplitude at the weld toe between rib and plate is only 8%of that without rigid pavement.Changing the thickness of deck plate has little effect on fatigue strength at the weld toe between U-rib and steel plate,and a 12-mm-thick steel plate can also meet the fatigue requirements.

关 键 词：正交异性钢桥面板 U肋 顶板 疲劳性能 有限元法 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]