纤维增强气凝胶保温隔热板—钢筋混凝土梁受弯性能试验研究

发布时间：2018-11-07 15:03

【摘要】：本文对12根不同类型的钢筋混凝土梁进行了受弯对比试验研究,主要内容包括:(1)对2根不同配筋率的普通钢筋混凝土梁进行了受弯试验研究,作为外贴两种板材和中部整浇纤维增强气凝胶保温隔热板钢筋混凝土梁的基准梁。(2)对4根外贴纤维增强气凝胶保温隔热板试验梁进行了受弯试验研究,验证了平截面假定;对于配筋率为0.421%的试验梁,外贴5mm板厚和外贴15mm板厚对试验梁的开裂荷载的提高幅度为17.7%、26.6%,极限荷载的提高幅度为11.9%、15.1%;对于配筋率为0.942%的试验梁,外贴5mm板厚和外贴15mm板厚对试验梁的开裂荷载的提高幅度为11.1%、22.2%,极限荷载的提高幅度为9.1%、11.4%。(3)对4根配筋率为0.942%且中部整浇纤维增强气凝胶保温隔热板试验梁进行了受弯试验研究,验证了平截面假定;对于未加腰筋的中部整浇厚度为5mm和15mm纤维增强气凝胶保温隔热板对试验梁的开裂荷载和极限荷载基本无影响;对于中部加腰筋的整浇厚度为5mm和15mm的纤维增强气凝胶保温隔热板对试验梁的开裂荷载基本无影响,但用于固定纤维增强气凝胶保温隔热板的4根腰筋之中有2根是位于梁的中下部,相当于受力筋,使其可以提高试验梁的极限荷载,提高的幅度约为19.4%。(4)对2根外贴EPS聚苯板的钢筋混凝土试验梁进行受弯试验研究,验证了平截面假定;外贴20mm的EPS聚苯板对配筋率为0.421%的试验梁的开裂荷载和极限荷载的提高幅度分别为17.7%和8.7%;对配筋率为0.942%的试验梁的开裂荷载和极限荷载的提高幅度分别为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.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU375.1

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