钢筋-再生骨料混凝土间粘结性的结构可靠性分析

Structural Reliability of the Bond between Steel Bar and Recycled Aggregate Concrete

再生骨料(RAC)和钢筋之间的粘结性是影响钢筋混凝土结构力学性能的基本因素之一,钢筋与再生骨料混凝土之间的粘结机理尚未被研究者完全理解和认识,为此,开展了理论和实验研究,探索了钢筋与RAC之间粘结的结构可靠性。主要涉及两个组成部分:在第一部分中,比较了天然骨料和再生骨料混凝土的粘结强度实验研究结果;在第二部分中,进行了相应的结构可靠性分析,探讨了在使用RAC情况下现有的锚固长度和搭接接头设计方法是否适用。

The bond between regenerated aggregate(RAC)and rebar is one of the basic factors that affect the mechanical properties of reinforced concrete structures.However,the bonding mechanism between steel bars and recycled aggregate concrete has not been fully understood by researchers.Therefore,it carried out theoretical and experimental research in this study,and explored the structural reliability of the bond between the steel bar and RAC.It involved two components.The first part compares the experimental results of the bond strength of natural aggregate and recycled aggregate concrete.In the second part,the corresponding structural reliability analysis is carried out to figure out whether the existing anchor length and the design method of lap joint are applicable under the condition of using RAC.