EVALUATION OF DEVELOPMENT LENGTH BASED ON AN E-DEFENSE SHAKE TABLE EXPERMENT ON REINFORCED CONCRETE BRIDGE COLUMN WITH TERMINATION OF LONGITUDINAL BARS

Abstract

A number of renforced concrete bridge columns with termination of longitudinal bars suffered significant damage during the 1995 Kobe, Japan, earthquake. One of the main reasons why such extensive damage occurred is insufficient development of longitudinal bars at the cut-off points. In this paper, development length is evaluated based on the response data of C1-2 bridge column in the E-Defense shake table experiments. It is found from the result that the development length increases as the damage at the cut-off of longitudinal bars progresses. A model for the development length based on the strain of the longitudinal bar without cutoff at the termination zone is developed.