AN EXPERIMENTAL STUDY ON ULTIMATE-LIMIT STATE OF REINFORCED CONCRETE CHECK DAM WINGS

Abstract

This paper presents an experimental approach for the ultimate-limit state of reinforced concrete (RC) check dam wings under impact loading of the huge rock in debris flow. At first, static loading tests were performed for the three types of specimen, i. e., the plain concrete, single and double RC cantilever slabs in which check dam wings were modeled. Secondary, horizontal impact loading apparatus was developed by using the 8 rubber hoses (1 rubber hose has 10cm diameter, 1.8m length and 16.5kgf/cm spring constant) and horizontal impact tests were executed for the three types of specimen. It was found from the static and impact tests that the cutting failure mode at the bottom surface of cantilever slab due to the crack connection is the unified ultimate-limit state of plain concrete and RC check dam wings.