CRACK RESTRAINT FACTORS IN ULTIMATE SLIP BEHAVIOR OF PERFOBOND STRIP

Abstract

The slip strength of perfobond strip is decided by yielding of perfobond plate or by concrete fracture. In the latter case, the strength will be effected by some factors restraining concrete crack around a hole. This paper clarifies the crack restraint factors enhancing slip strength of perfobond strip by conducting push-out and pull-out slip tests. It is concluded that the crack restraint factors are concrete covering of the connector, reinforcing bars set through or near the hole, and especially in push-out tests, the friction force between specimen and test bed which increases the slip strength greatly.