E玻纤织物增强磷酸镁水泥基混凝土薄板加固RC结构关键技术研究

发布时间：2018-01-02 15:26

本文关键词：E玻纤织物增强磷酸镁水泥基混凝土薄板加固RC结构关键技术研究　出处：《湖北工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：对既有钢筋混凝土结构进行维修加固具有广阔的应用市场,目前对钢筋混凝土结构进行加固的方法很多,其中,采用碳纤维布对钢筋混凝土梁、板、柱等加固已经普遍应用于工程,但这种加固方法有价格高、不耐火等缺点。用纤维织物网增强水泥基复合材料对钢筋混凝土结构进行加固已有研究,这种方法不仅可以降低成本,而且因为基体是无机材料所以抗火性能较好。E玻璃纤维具有强度高、价格便宜等特点,但耐碱性较差;磷酸镁水泥具有低碱性的特点。本文采用E玻璃纤维织物网作为增强筋,采用磷酸镁水泥制作的高性能混凝土作为基体,制作成薄板对钢筋混凝土结构进行加固,作了如下方面的研究工作:(1)进行了该类型的薄板的力学性能试验,试验结果表明该类型薄板具有良好的抗折、抗弯性能以及良好的变形性能;(2)对采用该类型的薄板加固的受弯钢筋混凝土梁进行了试验研究,考察了加固后构件的挠度、钢筋应变、混凝土应变、破坏形式、裂缝发展、承载力等特性,并得出加固效果良好的结论;(3)对采用该类型的薄板加固的抗剪钢筋混凝土梁进行了试验研究,考察了加固后构件的挠度、破坏形式、承载力等特性,并得出加固效果良好的结论;(4)对采用该类型的薄板加固的轴压钢筋混凝土柱进行了试验研究,考察了加固后构件的破坏形式、承载力等特性,并得出加固效果良好的结论。
[Abstract]:Of the existing reinforced concrete structure has wide application market maintenance and reinforcement of reinforced concrete structure, the strengthening of many methods, the use of the reinforced concrete beams, plates, columns reinforcement has been widely applied in engineering, but the reinforcement method has disadvantages such as high price, not reinforced refractory. Cement based composite material of reinforced concrete structure reinforcement has been studied with fiber fabric, this method can not only reduce costs, but also because the matrix is inorganic materials so good fire resistance of.E glass fiber with high strength, low price and other characteristics, but poor resistance to alkali; magnesium phosphate cement has the characteristics of low alkaline. This paper uses E glass fiber fabric as reinforced by high performance concrete made of magnesium phosphate cement as matrix, made into a sheet of reinforced concrete structure with solid, as The research work as follows: (1) the test of mechanical properties of the plate type, the test results show that the type of bending plate with good bending performance, and better deformation performance; (2) on the type of reinforcement using thin plate bending reinforced concrete Liang Jin experimental study investigated the deflection member reinforcement steel strain, concrete strain, failure mode, crack development, bearing capacity, and obtains good reinforcement effect conclusion; (3) the shear strengthening of RC beams with thin plate of the type of effects of deflection, the reinforcement component failure forms, characteristics the bearing capacity, and obtains good reinforcement effect conclusion; (4) the axial compression reinforced concrete columns strengthened by sheets of this type of investigation on failure form of the component after the reinforcement, the bearing capacity, and the reinforcement A good conclusion.

【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU375

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