STRUCTURAL BEHAVIOR OF MODIFIED REACTIVE POWDER AND REACTIVE POWDER CONCRETE WALL PANELS SUBJECTED TO AXIAL DISTRIBUTED LOADING

الملخص

This study presents an experimental investigation of the behavior of concrete wall panels subjected to axial distributed loading and also evaluates the effect of slenderness ratio( H/t ) and concrete strength on lateral deflection and behavior of concrete wall panels. The experimental program includes testing eight concrete wall panels hinged at the top and bottom with free sides, by applying distributed load. These panels are divided into four groups, the first group with normal strength concrete, the second group with high strength concrete, the third group with modified reactive powder concrete (MRPC), and the fourth group with reactive powder concrete (RPC). Each group consists of two panels, one with a slenderness ratio of H/t=20 and the other with H/t=14. The obtained results indicate that as the concrete strength of wall panels increases, the behavior of the panels tends toward the brittle failure, also the results show that the lateral deflection of the panel increase as the slenderness ratio (H/t) increase. The failure load for panels with RPC mix is greater than the failure load for panels with normal, high strength, MRPC mixes by about 96%, 39%, and 17% respectively (H/t=20). The failure load for panels with RPC mix is more than the failure load for panels with normal, high strength, MRPC mixes by about 98%, 36%, and 16% respectively for H/t=14. The mode of failure for all panels was buckling failure and the line of failure lies near the center of the panel.