摘要
冻融在造成混凝土物理力学性能变化的同时,势必改变混凝土与钢筋之间的黏结性能。利用C30、C40、C50三种混凝土强度中心短埋试件单调和往复荷载试验,研究冻融损伤对混凝土与光圆钢筋黏结应力-滑移曲线的影响,分析单调荷载下峰值黏结应力、峰值滑移和残余黏结应力的变化规律,探讨往复荷载作用下峰值黏结退化率与加载循环次数之间的关系。
Freezing and thawing while causing physical changes in the mechanical properties of concrete,it is bound to change the bond properties between concrete and steel. Center short buried specimens of three concrete strengths C30,C40 and C50 were subjected to the monotonic and cyclic loading tests,the effect of the freeze-thaw damage on concrete and plain bars bond stress-slip curve was studied,and the variation of the peak bond stress,peak slip and residual bond stress under monotonic loading was also analyzed,finally the relationship between the ultimate bond degradation rate and load cycles under cyclic loading was explored.
出处
《工业建筑》
CSCD
北大核心
2015年第2期23-26,14,共5页
Industrial Construction
基金
国家自然科学基金项目(51078307)
关键词
冻融混凝土
光圆钢筋
单调加载试验
往复加载试验
黏结滑移
frozen-thawed concrete
plain steel bar
monotonic loading test
cyclic loading test
bond-slip
