Abstract
In this paper, we discuss tensile strength of kinds of splices of reinforcing bars in recent years. As we could anew obtain more than 200,000 tensile test data carried out in Kinki-area and Tokyo area during 2004-2007, the data were compared with the previous 1982-1986 data on gas pressure welded splices in Tanaka's research.[1] As a result, failure ratio, that is the ratio of the number of specimens ruptured at the part other than mother bars, is reduced from 0.52% to 0.13% as for SD345 and it is 0.32% as for SD390, however, the splice of bars with bigger diameter and higher tensile strength show higher failure ratio as before. We also reconsidered the strength distribution of the splices and proposed a probability density function expressed as eq.(7) assuming a simple stochastic process.
