FRP筋海水海砂混凝土梁的受弯性能研究和理论分析
发布时间：2018-07-13 13:31
【摘要】：钢筋混凝土一直作为一种优良的建筑材料被广泛应用于各类民用以及工业建筑中,但是在某些环境下,如:海水腐蚀环境,其耐久性方面会存在一定的问题。如何改良钢筋混凝土这一严重缺陷一直是研究的热点。FRP筋是一种新型的复合材料筋,其抗腐蚀能力尤为突出,所以FRP筋与海水海砂混凝土共同工作是一种新兴的研究课题。基于FRP筋与海砂海水混凝土两种材料性质的互补,以及对FRP筋海砂海水混凝土新型材料未来的发展运用前景,本文开展了关于海砂海水混凝土力学性能研究以及FRP筋海水海砂混凝土梁受弯性能研究。为了研究海砂以及海水对混凝土强度影响,本文通过两组试验进行了对比研究,并根据研究结果得出较为可靠的配合比。为了了解FRP筋海水海砂混凝土梁的受弯性能,本文制作了10跟配筋率不同的试件进行压弯性能试验研究。主要测试了梁的挠度,承载力,裂缝开展等特性,并证明了平截面假定。在试验数据的基础上得出了FRP筋可靠的承载力计算办法,并对国内外的挠度计算公式进行了验证,验证结果表明原有的FRP筋混凝土梁的挠度公式可运用于FRP筋海水海砂混凝土梁。
[Abstract]:As an excellent building material, reinforced concrete has been widely used in various civil and industrial buildings. However, in some environments, such as seawater corrosion environment, there will be some problems in its durability. How to improve the serious defect of reinforced concrete has been a hot topic. FRP tendons are a new type of composite tendons and their corrosion resistance is particularly outstanding. So it is a new research topic that FRP bars work together with sea sand concrete. Based on the complementary properties of FRP bars and sea sand seawater concrete, and the prospect of the development and application of FRP reinforced sea sand seawater concrete in the future. In this paper, the mechanical properties of sea sand and sea water concrete and the flexural behavior of FRP reinforced sea sand concrete beams are studied. In order to study the effect of sea sand and sea water on the strength of concrete, a comparative study was carried out by two groups of tests, and a more reliable mix ratio was obtained according to the results of the study. In order to understand the flexural behavior of sea sand concrete beams with FRP bars, 10 specimens with different reinforcement ratios were made to study the bending behavior. The deflection, bearing capacity and crack development of the beam are tested, and the assumption of plane section is proved. Based on the experimental data, a reliable method for calculating the bearing capacity of FRP bars is obtained, and the formulas for calculating deflection at home and abroad are verified. The results show that the original deflection formula of FRP reinforced concrete beams can be applied to sea sand concrete beams with FRP bars.
【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU37
[Abstract]:As an excellent building material, reinforced concrete has been widely used in various civil and industrial buildings. However, in some environments, such as seawater corrosion environment, there will be some problems in its durability. How to improve the serious defect of reinforced concrete has been a hot topic. FRP tendons are a new type of composite tendons and their corrosion resistance is particularly outstanding. So it is a new research topic that FRP bars work together with sea sand concrete. Based on the complementary properties of FRP bars and sea sand seawater concrete, and the prospect of the development and application of FRP reinforced sea sand seawater concrete in the future. In this paper, the mechanical properties of sea sand and sea water concrete and the flexural behavior of FRP reinforced sea sand concrete beams are studied. In order to study the effect of sea sand and sea water on the strength of concrete, a comparative study was carried out by two groups of tests, and a more reliable mix ratio was obtained according to the results of the study. In order to understand the flexural behavior of sea sand concrete beams with FRP bars, 10 specimens with different reinforcement ratios were made to study the bending behavior. The deflection, bearing capacity and crack development of the beam are tested, and the assumption of plane section is proved. Based on the experimental data, a reliable method for calculating the bearing capacity of FRP bars is obtained, and the formulas for calculating deflection at home and abroad are verified. The results show that the original deflection formula of FRP reinforced concrete beams can be applied to sea sand concrete beams with FRP bars.
【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU37
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