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۱BENDING AND SHEARING STRENGTH OF T–FORMED BEAM MADE OF STRUCTURAL LIGHT CONCRETE USING FRP SHEETS
نویسنده(ها): ، ، ،
اطلاعات انتشار: سومین کنفرانس بین المللی بتن و توسعه، سال
تعداد صفحات: ۹
To study enforcement effect of T–formed beams made of Structural lightweight concrete by binding CFRP with use of epoxy resin on the bending & shearing resistance, nine lab samples were designed, built and tested. These samples were divided into A, B & C groups, regarding their weakness. In all beams, two rods # 12 were used as compressive armature. In A, designing was such that beams have
bending weakness. In these beams, two rods #12 were used as tensile armature and rod # 10 were used as shearing armature with a distance of 7.5 cm. In B, designing was such that beams have shearing weakness and 4 rods # 16 were used as tensile armature , the distance of stirrup was 30 cm. In c, designing was such that beams have shearing and also flexural weakness , In these beams , two rods # 12 were used as tensile armature and the distance of stirrups was 30 cm. According to observed studies, in flexural strengthening, beams have had a strength increase of 60%, although breaking was shearing and CFRP sheets didn’t reach the rupture stage. Studying beam’s shearing strengthening represents loading capacity increase of 20% and breaking was as stratified cutting of concrete with CFRP sheet. Also, we observed 45% increase of beam’s loading capacity from bending and also shearing strengthening together. In this case, failure mode was as stratified cutting of concrete with CFRP sheet from the beam’s side.<\div>
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