钢筋混凝土粘结滑移静动态比较试验分析

研制开发了一种可用于实时测量承受交变荷载的结构局部位置上钢筋与混凝土之间的粘结滑移关系τ-s曲线的测试装置,以及相应的计算和测控程序,并应用该装置对一组不同混凝土标号的钢筋混凝土柱在低周反复荷载下的剪应力-滑移值进行了测试。单向反复加载试验结果与国内外普遍采用的几个著名表达式接近,低周反复荷载试验的结果则揭示了交变滑移机理的独有特性,试验数据对于桥梁荷载、地震荷载的结构设计具有直接参考意义。

EXPERIMENTAL ANALYSIS FOR THE STATIC AND DYNAMIC COMPARISON OF THE REINFORCED CONCRETE BOND-SLIP

A new test device that can attain the real-time measurement on the τ-s curve of the bond-slip relationship between steel and concrete is proposed and designed,which focuses on the local position from the structure that can withstand alternating loads.In addition,calculation,measurement and control programs are developed and shown in this paper.A group of reinforced concrete columns with different grade are selected to be tested by the device to get the shear stress-slip values under low cyclic loading.The results of the one-way repeated loading test are similar with the output of the several well-known expressions that are commonly used domestic and abroad.Furthermore,the results of the cyclic loading test illustrate the characteristics of the alternating slip mechanism.The experimental data in this paper can make great contributions for the structure design of the bridge loads and the seismic load.