论文部分内容阅读
为了研究高强钢筋与再生混凝土间的黏结作用机理,以再生粗骨料取代率和高强钢筋埋置长度为变化参数,设计了15个边长为150 mm的高强钢筋再生混凝土立方体试件,并进行推出试验。通过试验获取了加载端和自由端荷载-滑移曲线的特征点参数,并回归得到各特征点黏结强度计算公式;分析了各变化参数对黏结强度的影响,并采用实用黏结强度计算公式进行对比计算。研究结果表明:高强钢筋与再生混凝土试件的黏结破坏以劈裂破坏为主;特征黏结强度均表现为随取代率的增加而呈现下降趋势,高强钢筋与再生混凝土的界面黏结强度随埋置长度的增加而有所增大。
In order to study the bonding mechanism between high strength steel and recycled concrete, 15 high strength reinforced concrete reinforced concrete cubes with 150 mm sides were designed and processed according to the replacement ratio of recycled coarse aggregate and the embedded length of high strength steel Launched the test. The parameters of the characteristic points of the load-slip curve at the loading end and the free end were obtained through experiments and the formulas for calculating the bond strength of the characteristic points were obtained by regression. The influence of each parameter on the bond strength was analyzed and compared with the practical bond strength formula Calculate. The results show that the bond failure between high strength steel and recycled concrete specimens is mainly composed of splitting failure, and the characteristic bond strength all shows a decreasing trend with the increasing substitution rate. The interfacial bond strength between high strength rebar and recycled concrete varies with the embedding length The increase has increased.