轻骨料混凝土中变形钢筋粘结应力分布试验研究

Test on Bond Stress Distribution of Deformed Reinforcement in Lightweight Aggregate Reinforcement Concrete

轻骨料混凝土作为一种新发展的建筑材料,对其粘结机理还没有达成共识。克服混凝土中钢筋应力测量的困难,通过钢筋内贴片粘结滑移试验,测得了轻骨料混凝土中变形钢筋加载端和自由端的相对位移、应力沿锚固长度的分布规律,进而得到了钢筋粘结应力分布规律。为轻骨料混凝土粘结机理研究及建立粘结本构关系提供了必要的基础。

Lightweight concrete is a developing constructional materials, and its bond stress mechanism needs more theoretic study. Difficulties on reinforcement＇s stress measure is overcome by placing the strain gauge in the reinforcement bar, and the distribution of the bond stress and relative slip along the anchorage length of reinforcement bar is calculated based on the test results. It offers the theoretic base for the lightweight concrete bond mechanics and the construction of bond stress model.