T型钢与混凝土粘结滑移破坏机理研究  

Failure mechanism study on the bond-slip between T section steel and concrete in SRC structures

作　　者：李红[1] 刘伯权[1] 吴涛[1] 马洪宝 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]甘肃省城乡规划设计研究院,甘肃兰州730000

出　　处：《四川建筑科学研究》2010年第5期45-48,共4页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50608004);高等学校博士点基金资助项目(20060710004)

摘　　要：根据8个T型钢混凝土试件的推出试验,研究了混凝土强度等级、混凝土保护层厚度和横向配箍率三个主要因素对型钢混凝土粘结滑移性能的影响,分析了荷载与加载端滑移曲线及型钢应力、粘结强度沿锚固长度的分布规律,探讨了T型钢混凝土粘结破坏机理、受力特点。试验结果表明,混凝土强度等级、保护层厚度以及配箍率对型钢混凝土粘结强度影响显著;在推出试验中,试件加载端混凝土受到拱效应作用,处于复杂的三向受压状态,提高了型钢与混凝土的粘结强度。The push-out tests of 8 specimens were conducted to study the bond-slip behaviors between T section steel and concrete in SRC structures （ steel reinforced concrete structures） ,which were impacted by three main factors including concrete stress,volume ratios of stirrups and thicknesses of concrete cover of section steel. The distributions of load-slip curve at load-end and section steel stress and bond strength along the embedded length were analyzed. The bond failure mechanism and bearing characteristics were also discussed. The test results show that with the increase of the concrete stress,volume ratios of stirrups and thicknesses of concrete cover of section steel,the bond stress is improved. In push-out test,the concrete at the load-end affected by arch action is in the complex triaxial pressure status,which can enhance the bond strength.

关 键 词：T型钢与混凝土 推出试验 粘结机理 粘结滑移性能 粘结强度 

分 类 号：TU392.1[建筑科学—结构工程] TU528