森林工程2024，Vol.40Issue(1)：171-182,12.DOI:10.3969/j.issn.1006-8023.2024.01.020
节段超高性能混凝土桥梁干接缝直剪性能研究
Research on Direct Shear Performance of Dry Joints of Segmental UHPC Bridges
摘要
Abstract
To investigate the shear behavior of ultra-high performance concrete(UHPC)dry joints,based on finite element analy-sis theory,the UHPC dry joints were modeled and analyzed in the general finite element analysis software(ABAQUS),and the me-chanical performance of the UHPC joints under direct shear load was obtained.Using existing experimental data,the applicability and accuracy of the American Association of State Highway and Transportation Officials(AASHTO)section bridge design code and UHPC dry joint shear strength calculation formula proposed by many scholars were evaluated.At the same time,the formula of direct shear ca-pacity of UHPC dry joint was obtained by fitting the collected measured data.The results showed that the ABAQUS model based on the concrete plastic damage theory can simulate the direct shear force characteristics of UHPC dry joints.The average value of the ratio be-tween the model test results and the finite element results was 0.970,and the coefficient of variation was 0.107.American AASHTO formula and Spanish ATEP formula based on ordinary concrete structure can not accurately predict the shear capacity of UHPC dry joint,and the calculation results were not safe.The prediction result of UHPC joint calculation formula proposed by scholars was con-servative,and the economy was poor.The calculation formula given in this study was accurate and can provide reference for joint de-sign and calculation of actual segment UHPC fabricated bridge.关键词
桥梁工程/UHPC/干接缝/有限元分析/直剪承载力Key words
Bridge engineering/UHPC/dry joints/finite element analysis/direct shear capacity分类
交通工程引用本文复制引用
古金伦,陈双庆,王靖君,裴必达..节段超高性能混凝土桥梁干接缝直剪性能研究[J].森林工程,2024,40(1):171-182,12.基金项目
湖南省青年基金项目(2021JJ40593) （2021JJ40593）
湖南创新型省份建设专项(2019SK2171) （2019SK2171）
湖南省交通科技创新计划(202013). （202013）
