ANALITICAL STUDY OF FLEXURAL STRENGTH AND DRIFT CAPACITY OF RC BEAMS UNDER MONOTONIC LOADING

Abstract

In recent year, high-strength concrete has becomes increasing popular. However, there are a limited number of tests of high-strength concrete beams. The aim of this paper is to evaluates flexural strength and drift capacity of RC beams specimens using conventional- and high-strength concrete materials. All specimens were tested under four-point monotonic loading. The measured compressive strength of the concrete is in the range of 18 – 126 MPa, longitudinal reinforcement yield strength is in the range 377 – 533 MPa and transverse reinforcement yield strength is in the range 377 – 541 MPa. Test parameters include specimen aspect ratio (a/d), Vn.a/Mn ratio, and maximum strain. Flexural strength of RC beams using conventional- and high- strength concrete calculated by ACI 318-14 and the results are close with experimental test result. Based on limited database results, for concrete compressive strengths greater than 55 MPa, increase of the outmost steel’s tensile strain leads to an increase of ultimate drift capacity.