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首页> 外文期刊>Magazine of Concrete Research >Compressive behaviour of CFS strengthened concrete specimens with various cross-sectional shapes and laminations
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Compressive behaviour of CFS strengthened concrete specimens with various cross-sectional shapes and laminations

机译：具有各种横截面形状和叠层的CFS增强混凝土试样的抗压性能

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摘要

The repairing technique of surface wrapping concrete structural members using fibre composite sheets has been widely used. Therefore, significant research efforts have concentrated on understanding the mechanism of concrete members wrapped with fibre composite sheets for lateral confinement. In order to apply the carbon fibre sheet (CFS) surface wrapping technique in retrofitting of aged concrete column structures, the effect of cross-sectional shape on concrete columns with CFS wrapping has been studied. In this research, compression tests have been performed on CFS reinforced concrete specimens with various cross-sectional shapes (i.e. square, octagonal, and circular) and lamination schemes (i.e. [0/0/0/0], [90/90/90/90], [0/45/-45/90], and [0/90/90/0]). The specimens were tested in order to understand the confinement effect of CFS from square to circular members. The test results showed that the strength and ductility of the specimens depend on the CFS fibre direction. Also, the specimens with octagonal cross-sectional shape behaved in a similar manner to the circular specimens, indicating that the retrofitting and strengthening of square columns can be effectively performed by converting them into octagonal columns. Based on the research results, a new repairing method of converting a square cross-sectional column to an octagonal one for CFS surface wrapping is currently being studied.
机译：使用纤维复合片材的表面包裹混凝土结构构件的修补技术已被广泛使用。因此，大量的研究工作集中在理解用纤维复合材料板包裹侧向约束的混凝土构件的机理。为了将碳纤维薄板（CFS）表面包裹技术应用于老化的混凝土柱结构改造中，研究了横截面形状对采用CFS包裹的混凝土柱的影响。在这项研究中，已经对具有各种横截面形状（即正方形，八边形和圆形）和层压方案（即[0/0/0/0]，[90/90/90]的CFS钢筋混凝土标本进行了压缩测试。 / 90]，[0/45 / -45 / 90]和[0/90/90/0]）。测试样本是为了了解CFS从方形到圆形构件的约束效果。测试结果表明，样品的强度和延展性取决于CFS纤维的方向。另外，具有八边形截面形状的试样的行为与圆形试样相似，这表明通过将其转换为八角形圆柱可以有效地进行方柱的翻新和加固。基于研究结果，目前正在研究一种将方形截面柱转换为八边形柱用于CFS表面包裹的新修复方法。

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