BEHAVIOUR OF WIDE REINFORCED CONCRETE BEAMS WITH DIFFERENT SHEAR STEEL PLATES SPACING

Abstract

This paper presents an experimental investigation on the behavior of wide reinforced concrete beams with different shear steel plate spacing. Four reinforced concrete wide beams with the dimensions of 215x560x1800mm are investigated. The variables studied in this work is using the 10mm stirrups with 125mm spacing and 3mm thickness steel plate with spacing 125, 166 and 250mm instead of reinforcing stirrups. Shear steel plates is a good alternative for stirrups and gives identical results in yield and ultimate loads and increase the ductility by 55% and reduced the strain in exterior and interior legs by 17% and 46% respectively compared with stirrups also reduced the total weight of wide beams by 2.7%. By increasing the spacing of shear steel plate by 33% and 100%, the results showed that the yield load reduced to 5% and 12% respectively, but the deflection was increased with 2% and 16% respectively(at yield). The strain in interior legs is more than the strain in exterior leg (having spacing 125, 166 and 250mm) by 31%, 70% and 1% respectively. ACI 318-14(1) and EC 2(2) codes are given a predicted deflection less than the experimental deflection by 19% and 21% on average respectively.