Ignoring the influence of non-bearing fiber and adopting tensile stress-strain relationship reinforced concrete obtained from uniaxial extension test of TRC thin plates,and based on the bending design theory of reinforced concrete elements,the flexural strength calculation theory of fine grained concrete reinforced with epoxy resin-impregnated textile was studied. The results indicate that satisfactory calculated values can be obtained when the model proposed by the Chinese Standard (GB 50010-2002) is used for simulating the ascending segment of compressive stress-strain curve of fine grained concrete; the effect of the number of textile layers on the stiffness of components is not significant before cracking,but the stiffness becomes greater with the increase in the number of textile layers after cracking; appropriate changes in the compressive strength of fine grained concrete and the compressive strain to reach ultimate load have no significant influence on theoretical values. Furthermore, before cracking, the theoretical curves are well in accordance with the experimental results regardless of the number of textile layers. After cracking, for the small beams reinforced with two or three layers of textile,comparison between the calculated and the experimental results reveals satisfactory agreement and thus it is proved that the formulae can be used for the design of fine grained concrete reinforced with epoxy resin-impregnated textile.%基于混凝土结构的抗弯设计理论,忽略非受力纤维的影响,采用由纤维编织网增强混凝土(TRC) 薄板单轴拉伸试验确定的纤维束的拉伸应力应变关系,对环氧树脂浸渍过的纤维编织网增强细粒混凝土的抗弯计算理论进行了研究.结果表明:细粒混凝土抗压应力应变上升段采用GB 50010-2002<混凝土结构设计规范>建议的模型即可获得理想的计算结果;不同的布设层数对构件开裂前的刚度影响不明显,开裂后刚度随着布设层数的增多而变大;适当改变细粒混凝土的抗压强度和极限荷载压应变对计算结果影响不大.无论布设几层网,开裂前,计算值和试验值几乎一致.开裂后,对于二层网和三层网增强的小梁,其计算值和试验值的变化趋势基本一致,说明该计算模型可用于环氧树脂浸渍过的纤维编织网增强细粒混凝土构件的设计计算.
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