横隔板含上缘过焊孔的钢桥面UHPC加固结构计算与试验研究  

Calculation and Experimental Study on UHPC Reinforcement of the Steel Bridge Deck on the Upper Welding Holes of the Diaphragm

作　　者：喻满 王洋 Yu Man;Wang Yang(Hunan Zhong Lu Hua Cheng Bridge Technology Co.,Ltd.,Xiangtan 411100,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南中路华程桥梁科技股份有限公司,湖南湘潭411100 [2]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《市政技术》2024年第8期56-63,共8页Journal of Municipal Technology

摘　　要：基于Ansys子模型技术有限元分析计算了原钢桥面与UHPC加固后组合桥面中上缘过焊孔的疲劳细节应力,其中横隔板-面板焊接细节的名义应力最大,达188.7 MPa,开裂风险极高。采用钢-UHPC组合桥面结构加固后,该细节的名义应力降至25.4 MPa,降幅达86.5%,但UHPC层最大拉应力达14.3 MPa。由此开展了不同配筋形式的钢-UHPC组合桥面结构抗弯参数试验,试验结果表明:钢筋间距为50 mm的钢-UHPC组合桥面板,其UHPC层抗裂强度达22.3 MPa,抗裂安全系数达1.56,满足实桥抗裂要求。相关研究结论可为类似钢桥面加固结构设计提供参考。Based on the sub modeling technique of Ansys,a finite element analysis was conducted to calculate the fatigue detail stress at the upper cutouts in both the original steel bridge deck and the composite bridge deck reinforced with UHPC.The nominal stress at the diaphragm-deck welding detail was found to be the highest,reaching 188.7 MPa,indicating a very high risk of cracking.After reinforcement with the steel-UHPC composite deck,the nominal stress at this detail reduced to 25.4 MPa,a decrease of 86.5%.However,the maximum tensile stress in the UHPC layer reached 14.3 MPa.Consequently,bending tests were conducted on the steel-UHPC composite deck with different reinforcement configurations.The test results showed that the crack resistance strength of UHPC layer is 22.3 MPa for a steel-UHPC composite deck with a reinforcement spacing of 50 mm,with a crack resistance safety factor of 1.56,meeting the crack resistance requirements of actual bridges.These research findings can provide reference for similar engineering projects.

关 键 词：桥梁 钢桥面 UHPC加固结构 横隔板 过焊孔 抗弯试验 

分 类 号：U443.5[建筑科学—桥梁与隧道工程]