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A Case Study On Concrete Column Strength Improvement with Different steel fibers and polypropylene fibers

机译:不同钢纤维和聚丙烯纤维混凝土柱强度改善的案例研究

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High presentation concrete is chiefly cast-off in multistory constructions where it expressively lessening the measurements of columns, which styles it a more economical excellent for building than normal strength concrete. In seismic area, high enactment concrete posses more complications, since it has less ductility in comparison with normal concrete. The purpose of this research is to detect the combined consequence of fibers and ties on the conduct of reinforced columns and to advance their ductility. This study presents an investigational valuation of strength and ductility of ordinary and high presentation concrete short columns limited by tie with and without steel fibers and polypropylene fibers. Five square concrete columns (100×100×1000) mm were established. The variables considered were, concrete strength, volume percentage of longitudinal reinforcement (4.52%), volumetric ratio of lateral reinforcement (spacing between ties) (5.58%) volume fraction of fibers (0.5% and 0.75%), form of fibers (hooked steel fiber and polypropylene) and phase ratio of steel fibers (100) (length 50mm and diameter 0.5mm) and (60) (length 30mm and diameter 0.5mm). The column specimens were tested under axial load. The values presented that the adding of steel fibers (volume friction 0.75% and aspect ratio 100) for high presentation concrete improves the compressive strength, splitting tensile strength, flexural strength, and static modulus of elasticity. Commonly, the effects also exhibited that the adding of fibers to usual and high act concrete upsurges the strength and advances their performance.
机译:高呈现混凝土主要是在多层建筑中抛弃的,在多晶结构中,它表达地减少了柱的测量,这使其更加经济,而不是正常强度混凝土。在地震区,高颁布混凝土具有更多的并发症,因为与正常混凝土相比,它具有较少的延展性。本研究的目的是检测纤维的综合后果和联系对增强柱的行为和推进延展性的关系。本研究介绍了普通和高呈现混凝土短柱的强度和延展性的调查估值,这些短柱限制了钢丝和不含钢纤维和聚丙烯纤维。建立了五个方形混凝土柱(100×100×1000)mm。所考虑的变量是纵向增强(4.52%),横向增强件的体积比(线圈间距)的体积比(5.58%)的纤维(0.5%和0.75%),纤维形式(钩钢纤维和聚丙烯)和钢纤维(100)(长50mm和直径0.5mm)和(60)(长30mm和直径0.5mm)的相比。柱标本在轴向载荷下进行测试。提出了高呈现混凝土的钢纤维(体积摩擦0.75%和纵横比100)的增压改善了抗压强度,分裂拉伸强度,弯曲强度和静态弹性模量。通常,这些效果还表明,对常规和高动作混凝土的纤维增加了强度并推进了它们的性能。

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