發(fā)布時(shí)間：2018-07-13 13:31

【摘要】：鋼筋混凝土一直作為一種優(yōu)良的建筑材料被廣泛應(yīng)用于各類民用以及工業(yè)建筑中,但是在某些環(huán)境下,如:海水腐蝕環(huán)境,其耐久性方面會存在一定的問題。如何改良鋼筋混凝土這一嚴(yán)重缺陷一直是研究的熱點(diǎn)。FRP筋是一種新型的復(fù)合材料筋,其抗腐蝕能力尤為突出,所以FRP筋與海水海砂混凝土共同工作是一種新興的研究課題�；贔RP筋與海砂海水混凝土兩種材料性質(zhì)的互補(bǔ),以及對FRP筋海砂海水混凝土新型材料未來的發(fā)展運(yùn)用前景,本文開展了關(guān)于海砂海水混凝土力學(xué)性能研究以及FRP筋海水海砂混凝土梁受彎性能研究。為了研究海砂以及海水對混凝土強(qiáng)度影響,本文通過兩組試驗(yàn)進(jìn)行了對比研究,并根據(jù)研究結(jié)果得出較為可靠的配合比。為了了解FRP筋海水海砂混凝土梁的受彎性能,本文制作了10跟配筋率不同的試件進(jìn)行壓彎性能試驗(yàn)研究。主要測試了梁的撓度,承載力,裂縫開展等特性,并證明了平截面假定。在試驗(yàn)數(shù)據(jù)的基礎(chǔ)上得出了FRP筋可靠的承載力計(jì)算辦法,并對國內(nèi)外的撓度計(jì)算公式進(jìn)行了驗(yàn)證,驗(yàn)證結(jié)果表明原有的FRP筋混凝土梁的撓度公式可運(yùn)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.
【學(xué)位授予單位】：內(nèi)蒙古工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU37

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本文編號：2119537