建筑结构学报2011，Vol.32Issue(2)：120-125,6.
高温后HRBF500细晶粒钢筋力学性能试验研究
Experimental research on material properties of HRBF500 after high temperature
摘要
Abstract
The mechanical properties of 16 groups and a total of 48 hot rolled bars of fine grains (HRBF) under normal temperature and after high temperature and cooling process (totally 5 high temperatures and 3 cooling methods) were tested and the tensile stress-strain relationships of HRB500 after experiencing various high temperatures were obtained.The variation of yield strength, tensile strength, elastic modulus and average elongation percentage were studied.Experimental results indicate that the mechanical properties of the steel bars do not change obviously when the highest temperatures the steel bars experienced are relatively low (300℃, 400℃ and 600℃, respectively).The mechanical property indices of the steel bars degrade gradually when the highest temperatures the steel bars experienced are relatively high (700℃ and 900℃ respectively).Based on the experimental results, the formulae predicting yield strength, tensile strength, elastic modulus and average elongation percentage of HRBF500 after high temperature were proposed using regression analysis.The conclusions of this research can provide the experimental background for damage evaluation of reinforced concrete structures using HRBF500 after fire.关键词
细晶粒钢筋/冷却方式/高温试验/力学性能分类
建筑与水利引用本文复制引用
王全凤,吴红翠,徐玉野,杨勇新,霍喆赟 ..高温后HRBF500细晶粒钢筋力学性能试验研究[J].建筑结构学报,2011,32(2):120-125,6.基金项目
国家高技术研究发展计划(863)项目(2007AA03Z550),福建省青年科技人才创新项目(2007F3064). （863）
