An applicability of dynamic response analysis of shear-failure type RC beams with lightweight aggregate concrete under falling-weight impact loading

摘要

In order to establish a simple and rational impact response analysis method for lightweight aggregate reinforced concrete (RC) beams, three-dimensional elasto-plastic finite element analysis was conducted for shear-failure type RC beams under falling-weight impact loading. The, tensile strength of concrete was assumed as l/16th of the compressive one. An applicability of the proposed analysis method was confirmed by comparing with the experimental results of twelve beams. From this study, following results were obtained: (1) three response wave configurations: impact force; reaction force; and mid-span displacement, and crack patterns can be rationally predicted by using proposed analysis method; and (2) maximum response values of impact force, reaction force, and displacement can be estimated considering 20, 20, and 10% safety margin, respectively.%Department of Earthquake Engineering, School of Civil and Environmental Engineering (SCEE), National University of Sciences & Technology (NUST),Islamabad, Pakistan;Department of Civil Engineering and Architecture,Muroran Institute of Technology, Muroran 050-8585,Japan;Technical Research Institute, Mitsui Construction,Co. Ltd., Nagareyama 270-0132, Japan;