Mechanics and Design for Bond Splitting Failure in Reinforced Concrete

本研究的目的是建立一个合理可靠的公式来评估混凝土中钢筋的粘结劈裂强度。1996年进行了一系列搭接试验，试验参数为：(a)横向配筋率（0.3%和1.2%）；(b)有无子筋(c)主筋与横向钢筋之间的间隙(d)拼接长度（10倍或40倍的主筋直径）第三个参数对于验证我们基于三角梁假设的模型是否正确尤为重要。结果与我们的预测相反。因此，1997年对该模型进行了修订。在新模型中，采用Voronoi图对带有拼接的梁截面进行了划分，并采用刚体-弹簧模型进行了分析。结果沿着拼接进行整合。结果一致得多。

The objective of this study is to develop a rational and reliable equation to evaluate bond splitting strength of reinforcing bars in concrete. In 1996, a series of experiments of lap splices were conducted with the following parameters :(a) ratio of transverse reinforcement (0.3% and 1,2%) ;(b) with or without sub-ties(c) clearance between main bars and transverse reinforcement(d) splice length (10times or 40 times of main bar diameter)The third parameter was especially important to verify whether our model based on the assumption of triangular beams was correct or not. The results were against our prediction. Thus, in 1997, the model was revised. In the new model, beam section with splice was partitioned using Voronoi diagram, and anlyzed using the rigid-body-spring-model. The results were integrated along the splice. Much better agreement was obtained.