| 摘要: |
| 对大偏心受压、受弯、大偏心受拉、小偏心受拉和轴心受拉圆形截面钢筋混凝土试件进行了试验，测定了不同荷载下的钢筋应变、裂缝宽度、裂缝宽度-荷载曲线和钢筋应力-荷载曲线，研究了各种试件的裂缝发展规律．结果表明，各种试件的裂缝发展规律基本一致，即荷载很小时不出现裂缝；从混凝土出现第一条裂缝到钢筋屈服，裂缝宽度随荷载基本呈线性增长；钢筋屈服后，裂缝随荷载增大而迅速增长．最后对裂缝宽度进行了统计分析，给出裂缝宽度的概率分布． |
| 关键词: 钢筋混凝土 裂缝宽度 钢筋应变 钢筋应力 钢筋屈服 试验研究 |
| DOI： |
| 分类号:TU375 TU317 |
| 基金项目:教育部创新团队发展基金 |
|
| Experimental study on crack width of reinforced concrete members with round section |
|
WEI Wei-wei,GONG Jin-xin,LI Long
|
| Abstract: |
| An experimental study is made on reinforced concrete specimens with round section under combined action of axial force and bending. The reinforcement strain, crack width, crack width-load and reinforcement stress-load relationship at various load levels are measured and the development of crack is monitored. Experiment results show that the development rule of cracks is basically the same for all kinds of specimens, that there is no cracking in the specimens when load is small, that from the first crack appearance in concrete to the yield in reinforcement, crack width increases approximately according to linearity with loading, and that after reinforcement yield, crack width increases rapidly with loading. The probability distribution of crack width is established based on test results. |
| Key words: reinforced concrete crack width reinforcement strain reinforcement stress reinforcement yield experimental study |
