EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF ANCHORAGES EMBEDDED IN REINFORCED CONCRETE WITH FLEXURAL CRACKS

Abstract

 This paper deal with the strength and hysteretic behavior during an earthquakes associated with the anchorages considering the effects of flexural cracks developed in reinforced concrete. In the experiments, eight reinforced concrete specimens with four headed anchor bolts are used. These specimens include two types of anchorages depending on the failure modes: the bolt yield type and the concrete failure type. The Results of cyclic loading tests (static tests) show that the effects of the flexural cracks in the anchorage strength appears more obviously in the concrete failure type than the bolt yield type. However, the strength can be recovered by applying crack repair with the epoxy injection. In addition, a series of the shake table tests (dynamic tests) present that the nonlinear hysteretic behavior of the anchorages under the dynamic loads demonstrates well those under the static loads.