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纤维编织网增强混凝土(TRC)是一种新型的高性能纤维增强水泥基复合材料,其不但有良好的耐腐蚀性,还可以有效限制混凝土的裂缝发展,使混凝土的裂缝宽度和间距变得更小.但由于纤维本身的脆性特征,使TRC结构达到极限荷载时没有明显的破坏预兆,而普通钢筋混凝土结构则由于特殊保护层厚度的限制,具有较大的自重,且不能有效限制结构的主裂缝发展.为克服二者的不足,本文创新性地提出纤维编织网联合钢筋增强混凝土结构,其充分利用了TRC和RC的优点.采用TRC替代其受拉区保护层的部分混凝土,同时减掉纤维编织网所替代钢筋用量,以发展一种自重小、使用安全、耐久性好的结构.分析了这种结构适筋梁的受弯发展过程,基于平截面假定按非线性分析理论给出了整个受力过程不同阶段梁的承载力,M-φ关系和跨中挠度的解析计算公式.最后通过与试验结果的对比,验证公式的合理性.
Fiberglass Reinforced Concrete (TRC) is a new type of high performance fiber-reinforced cementitious composite that not only has good corrosion resistance, but also effectively limits the development of concrete cracks and makes the concrete crack width and spacing more However, due to the brittleness of the fiber itself, there is no obvious sign of damage when the TRC structure reaches the ultimate load, whereas the ordinary reinforced concrete structure has greater self-weight due to the thickness of the special protective layer and can not effectively limit the structure of the main In order to overcome the shortcomings of both, this paper proposes a new type of fiber reinforced braid reinforced concrete structure, which takes full advantage of the advantages of TRC and RC.The TRC is used to replace part of the concrete in the protective layer of the tension zone, The amount of rebar replaced by fiber braid is used to develop a structure with small weight, safe use and good durability. The bending development of this kind of structure is analyzed. Based on the assumption of flat section, the theory of nonlinear analysis is given The bearing capacity, the M-φ relation and the analytical formula of the mid-span deflection of the beam during different stages of the whole loading process.Finally, by comparison with the test results, Rationality card formula.