论文部分内容阅读
通过对48个普通混凝土与细晶粒钢筋粘结锚固试件的拔出试验,系统地研究了高温后粘结锚固的特点和影响粘结锚固强度的主要因素。钢筋混凝土试件的受热温度分别为20,200,400,600℃,冷却方式为空气中自然冷却,加载方式为单向拉拔。试验考虑了锚固长度、配箍率以及温度的影响,分析了各种参数对高温后钢筋与混凝土粘结性能的影响规律,研究了高温对混凝土抗拉强度和粘结锚固强度的影响,并讨论了高温后混凝土抗拉强度和粘结锚固强度的关系。
Based on the pull-out test of 48 ordinary concrete and fine-grained steel bar bonded anchoring specimens, the characteristics of the bonded anchorage after high temperature and the main factors affecting the anchoring strength are systematically studied. Reinforced concrete specimens were heated at temperatures of 20,200,400,600 ℃, respectively, the cooling mode of natural cooling in the air, the loading mode is one-way drawing. The influence of anchoring length, stirrup ratio and temperature was considered. The influence of various parameters on the bond behavior between steel and concrete after high temperature was analyzed. The effect of high temperature on the tensile strength and bond strength of concrete was also discussed. Relationship between tensile strength and bond strength of concrete after high temperature.