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【摘要】：本文對12根不同類型的鋼筋混凝土梁進行了受彎對比試驗研究,主要內(nèi)容包括:(1)對2根不同配筋率的普通鋼筋混凝土梁進行了受彎試驗研究,作為外貼兩種板材和中部整澆纖維增強氣凝膠保溫隔熱板鋼筋混凝土梁的基準梁。(2)對4根外貼纖維增強氣凝膠保溫隔熱板試驗梁進行了受彎試驗研究,驗證了平截面假定;對于配筋率為0.421%的試驗梁,外貼5mm板厚和外貼15mm板厚對試驗梁的開裂荷載的提高幅度為17.7%、26.6%,極限荷載的提高幅度為11.9%、15.1%;對于配筋率為0.942%的試驗梁,外貼5mm板厚和外貼15mm板厚對試驗梁的開裂荷載的提高幅度為11.1%、22.2%,極限荷載的提高幅度為9.1%、11.4%。(3)對4根配筋率為0.942%且中部整澆纖維增強氣凝膠保溫隔熱板試驗梁進行了受彎試驗研究,驗證了平截面假定;對于未加腰筋的中部整澆厚度為5mm和15mm纖維增強氣凝膠保溫隔熱板對試驗梁的開裂荷載和極限荷載基本無影響;對于中部加腰筋的整澆厚度為5mm和15mm的纖維增強氣凝膠保溫隔熱板對試驗梁的開裂荷載基本無影響,但用于固定纖維增強氣凝膠保溫隔熱板的4根腰筋之中有2根是位于梁的中下部,相當于受力筋,使其可以提高試驗梁的極限荷載,提高的幅度約為19.4%。(4)對2根外貼EPS聚苯板的鋼筋混凝土試驗梁進行受彎試驗研究,驗證了平截面假定;外貼20mm的EPS聚苯板對配筋率為0.421%的試驗梁的開裂荷載和極限荷載的提高幅度分別為17.7%和8.7%;對配筋率為0.942%的試驗梁的開裂荷載和極限荷載的提高幅度分別為11.1%和6.8%。
[Abstract]:In this paper, 12 different types of reinforced concrete beams are studied in flexural tests. The main contents are as follows: (1) two common reinforced concrete beams with different reinforcement ratios are studied by bending test. As the reference beam of two kinds of external affixed sheets and central cast-in-place fiber reinforced aerogel insulation board, the bending test of four externally bonded fiber reinforced aerogel insulation plate test beams was carried out. The assumption of plane section is verified. For the test beam with a reinforcement ratio of 0.421%, the cracking load of the test beam with the thickness of the external 5mm plate and the external 15mm plate is increased by 17.726.6%, and the ultimate load is increased by 11.9g / 15.1; For the test beam with a reinforcement ratio of 0.942%, the crack load of the test beam subjected to the thickness of the external 5mm plate and the external 15mm plate is increased by 11.1 and 22.2cm, and the limit load is increased by 9.1. (3) the bending test of 4 test beams with a reinforcement ratio of 0.942% and central cast-in-place fiber reinforced aerogel insulation board was carried out, and the assumption of plane section was verified. The thickness of 5mm and 15mm fiber reinforced aerogel insulation plate without waist reinforcement has no effect on the cracking load and ultimate load of the test beam. For the fiber reinforced aerogel insulation board with the thickness of 5mm and 15mm in the middle part of the steel bar, there is no effect on the cracking load of the test beam. But two of the four lumbar tendons used in the fixed fiber reinforced aerogel insulation board are located in the middle and lower part of the beam, which is equivalent to the stress bar, so that the ultimate load of the test beam can be increased. (4) the bending test of two reinforced concrete test beams with EPS polystyrene plates is carried out, which verifies the assumption of plane section. The increase of cracking load and ultimate load of EPS polystyrene plate attached to 20mm are 17.7% and 8.7% respectively for the test beam whose reinforcement ratio is 0.421%. The crack load and ultimate load of the test beam with a reinforcement ratio of 0.942% are increased by 11.1% and 6.8% respectively.
【學位授予單位】：廣州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU375.1

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本文編號：2316730