论文部分内容阅读
主要通过42个局部粘结的中心拔出试验,研究不同钢纤维体积率、不同钢筋直径和不同钢纤维长径比对钢纤维高强陶粒混凝土与钢筋粘结性能的影响;用能量吸收和等效粘结强度评价了钢纤维高强陶粒混凝土与钢筋之间的粘结韧性。试验结果表明:不掺钢纤维的高强陶粒混凝土的破坏形式为劈裂破坏,掺钢纤维的高强陶粒混凝土的破坏形式为钢筋拔出破坏;在其他条件相同的情况下,钢纤维掺量越高其极限粘结强度越高(相对于不掺钢纤维的陶粒混凝土,钢纤维体积率为0.5%,1%,1.5%时,其极限粘结强度分别提高了6.7%,13.4%,18.6%);直径为22mm的钢筋的极限粘结强度比直径为16mm的钢筋的极限粘结强度低12.3%。
Mainly through 42 local bonding center pull out the test to study the different steel fiber volume ratio, different steel diameter and different steel fiber aspect ratio on the steel fiber high strength ceramsite concrete and steel bond performance; with energy absorption and so on Effective Bond Strength The bond toughness between steel fiber reinforced high strength ceramsite concrete and steel was evaluated. The test results show that the failure mode of high-strength ceramsite concrete without steel fiber is splitting failure, and the failure mode of high-strength ceramsite concrete with steel fiber is pull-out failure of steel bar. Under other conditions, The higher the ultimate bond strength is, the higher the ultimate bond strength is (6.7%, 13.4%, respectively) when the volume fraction of steel fiber is 0.5%, 1% and 1.5% 18.6%); the ultimate bond strength of steel bars with a diameter of 22 mm is 12.3% lower than the ultimate bond strength of steel bars with a diameter of 16 mm.