EXPERIMENTAL STUDY ON THE RESIDUAL STRENGTH OF CONCRETE FILLED TUBE DAMAGED BY ROCK COLLISION

Abstract

This paper presents an experimental study on the residual strength of concrete filled tubes damaged by rock collision. We carried out two kinds of tests to obtain the residual strength and the residual energy absorption capacity of damaged concrete filled tubes. First, the weight dropping test was conducted to give the damage to the concrete filled tube. Second, the static and rapid speed flexural test were performed to obtain the load-displacement relation and to investigate the speed effect on the residual strength and the residual energy absorption capacity. We could propose the serviceability limit and the ultimate limit of the damaged concrete filled tube as the residual deformation angles θ=1° and θ=5°, respectively.