Simulation Analysis of Tensile Behavior of Half Grout Sleeve Splicing of Rebars at Elevated Temperatures Based on ABAQUS
Fire is a disaster that house structure has to face.Half grout sleeve splicing of rebars (HGSSR) is an important way of connecting rebars in an assembled concrete structure.Elevated temperature has a non-negligible effect on the tensile behavior of HGSSR, and the related research and literatures are quite rare.Considering the influence of temperature on material constitutive relations, finite element software ABAQUS were used to establish the numerical model of half grout sleeves splicing of rebars specimens, and then to analyse the static tensile behavior of HGSSR at room temperature, 200℃, 400℃,and 6000℃.By the comparison of simulation results with test results, it was verified that the finite element model was correct and the parameters were reasonable.Based on this, establishing the finite element model of half grout sleeves splicing of rebars specimens at 500℃, 700℃ to further analysis the effects of elevated temperature at 500℃ and 700℃ on tensile properties of HGSSR.The results show that the results of the finite element calculation agree well with the test results, verified the correctness of the finite element simulation method;The 500 ℃ elevated temperature does not change the bearing capacity of HGSSR specimens at 400 ℃, and the slip between the steel and the grouting material, the grouting material and the sleeve increases;The 700 ℃ elevated temperature has significant influence on the tensile properties of HGSSR specimens, and compared with 600℃, the bearing capacity has decreased significantly and the slippage also increases significantly.The research results can provide reference for the study of tensile behavior of HGSSR at elevated temperatures, and the design of HGSSR in practical engineering.
half grout sleeve splicing of rebars finite element analysis elevated temperature tensile properties
Wang-xi ZHANG Chao HE Xi DENG
College of Civil Engineering, Hunan University, Changsha 410012, P.R.China
国际会议
福州
英文
839-848
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）