建筑结构学报2024，Vol.45Issue(6)：62-73,12.DOI:10.14006/j.jzjgxb.2023.0481
高强混凝土无腹筋梁不同破坏形态受剪性能试验研究
Experimental study on shear behavior of high-strength concrete beams without web reinforcement in different failure patterns
摘要
Abstract
To investigate the shear behavior of high-strength concrete beams without web reinforcement in different failure patterns,this study conducted shear behavior tests on nine high-strength concrete beams(with a concrete strength grade of C90)subjected to concentrated loads,while considering the shear-span ratio and the effective depth of section as main parameters.The failure pattern,performance state and corresponding nominal shear strength of the specimens were analyzed.Based on experimental observations and load-bearing characteristics of specimens,it was found that the main failure sign was the appearance of main inclined cracks in the diagonal-tensile specimens,and the crushing of concrete in the compression zone was the main failure sign in the shear-compressive and diagonal-compressive failure specimens.The analysis of nominal shear strength reveals that the joint influence of shear-span ratio and effective depth of section is observed on the nominal shear-splitting strength,while the predominant factor affecting the nominal shear-failure strength is the shear-span ratio.The nominal shear-splitting strength and the nominal shear-failure strength can be determined based on the tensile and compressive strengths of concrete,respectively.The shear capacity evaluation should prioritize shear-splitting as the governing state,based on a comprehensive analysis of both domestic and foreign design standards.Furthermore,it is crucial to thoroughly consider the size effects in order to enhance the accuracy of the assessment.关键词
高强混凝土无腹筋梁/受剪性能/剪切开裂状态/剪切破坏状态/名义剪切强度Key words
high-strength concrete beam without web reinforcement/shear behavior/shear splitting state/shear failure state/nominal shear strength分类
建筑与水利引用本文复制引用
耿相日,黄小坤,徐福泉,刘璐..高强混凝土无腹筋梁不同破坏形态受剪性能试验研究[J].建筑结构学报,2024,45(6):62-73,12.基金项目
住房和城乡建设部标准定额研究所工程建设标准化基础研究项目(2023年). （2023年）
