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首页> 外文期刊>Karbala International Journal of Modern Science >Influence of Carbon Fibres on Strain Sensing and Structural Properties of RC Beams without Stirrups
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Influence of Carbon Fibres on Strain Sensing and Structural Properties of RC Beams without Stirrups

机译：碳纤维对没有搅拌的RC梁应变感应和结构性质的影响

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In present study, effect of micro carbon fibres on strain sensing property and structural behavior of the reinforced concrete (RC) beams in absence of stirrups was experimentally investigated. A total of three RC beams of dimensions, 125 mm width, 350 mm height and 1500 mm long were manufactured without stirrups. All the three beams had different longitudinal reinforcement ratios (0.9%, 1.43% and 1.03 %) and uniform strength of concrete of 36.5 MPa. All the beams had carbon fibre based concrete (CFBC) at top and bottom surface in mid span for a length of 350mm and depth of 78 mm. All the beams were tested to failure under four point bending test for evaluating strain sensing property and structural behavior of carbon fibre based concrete. Fractional change in resistance (FCR) was calculated for top and bottom surface of the beam and co-related with strain in concrete and strain in tensile reinforcement. It was observed that as load increases on the beam, the FCR was increasing for the bottom surface (tension side) and decreasing for the top surface (compressive side). The trend of change in FCR for top and bottom surface is observed to be similar as that of strain in tensile reinforcement and concrete. It was also observed that, obtained FCR graphs can be used for strain and damage detection in beam. All the beams failed in shear with improved load carrying capacity as reinforcement ratio increased.
机译：实验研究了在本研究中，实验研究了微碳纤维对钢筋混凝土（RC）梁的应变感测性和结构行为的影响。在没有搅拌的情况下，总共包括三个尺寸，125毫米宽度，350毫米高，长度为1500毫米梁。所有三个光束的纵向增强比（0.9％，1.43％和1.03％）和36.5MPa混凝土的均匀强度均匀。所有光束在中间的顶部和底部表面上有碳纤维的混凝土（CFBC），长度为350mm，深度为78毫米。在四点弯曲试验下测试所有光束以进行弯曲试验，以评估碳纤维混凝土的应变传感性和结构行为。抗性（FCR）的分数变化用于梁的顶部和底表面，与抗拉伸加固中的混凝土和菌株的菌株共同相关。观察到，随着梁上的负载增加，FCR对于底表面（张力侧）增加并降低顶表面（压缩侧）。观察到顶表面和底表面的FCR变化趋势与拉伸加固和混凝土中的应变类似。还观察到，获得的FCR图形可用于束中的应变和损坏检测。随着增强率的增加，所有光束都以改善的负载承载能力剪切而失效。

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