A kind of high-temperature prestressed FRP tube-confined steel recycled concrete column and its preparation method
A recycled concrete, prestressed technology, applied in the direction of columns, pillars, piers, etc., can solve the problems of poor flexural performance and insufficient bearing capacity, to overcome poor compressive capacity, improve crack resistance and ductility, and enhance bearing capacity. The effect of capacity and stiffness
Active Publication Date: 2022-03-04
YANGZHOU UNIV
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Problems solved by technology
[0004] The object of the present invention is to address the problems in the above-mentioned prior art, and provide a low-cost, high-efficiency composite member using recycled concrete, specifically a high-temperature prestressed FRP tube-constrained steel recycled concrete column and a preparation method thereof. The method can significantly overcome the disadvantages of variability, insufficient bearing capacity, and poor bending resistance when recycled concrete is used alone, and improve the performance of recycled concrete columns.
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[0037] The present invention will be further described below in conjunction with the drawings and descriptions of the drawings.
[0038] A high-temperature prestressed FRP tube-constrained shaped steel recycled concrete column, including FRP tube 1, shaped steel 2, recycled concrete 3, and heat-insulating mortar layer 4, FRP tube 1 is a prestressed FRP tube; the center of mass of shaped steel 2 and the center of circle of FRP tube 1 Coincidentally, the inner wall of the FRP pipe 1 is sprayed with a thermal insulation mortar layer 4, and the recycled concrete 3 is poured between the prestressed FRP pipe 1 and the section steel 2. The cross-section of the FRP pipe 1 is circular; the FRP pipe 1 is BFRP, CFRP, GFRP or AFRP, and the FRP pipe 1 is formed by extruding through a mold after gluing multiple strands of continuous fibers through the base material. It is a high temperature resistant resin; the FRP pipe 1 is calcined at a high temperature to obtain a prestressing effect; th...
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The invention relates to a high-temperature prestressed FRP pipe-constrained shaped steel recycled concrete column and a preparation method thereof, comprising an FRP pipe, shaped steel, recycled concrete, and a heat-insulating mortar layer, and the FRP pipe is a prestressed FRP pipe; the center of mass of the shaped steel and the FRP pipe The center of the circle coincides, the inner wall of the FRP pipe is sprayed with a heat-insulating mortar layer, and recycled concrete is poured between the prestressed FRP pipe and the section steel. The invention effectively overcomes the shortcomings of the recycled concrete column such as too low rigidity, poor compressive resistance, and variability, effectively inhibits the development of cracks, improves the bearing capacity of the recycled concrete column, and avoids brittle failure of the recycled concrete column.
Description
technical field [0001] The invention relates to a high-temperature prestressed FRP pipe-constrained steel recycled concrete column and a preparation method thereof, belonging to the application field of civil engineering. Background technique [0002] It is conservatively estimated that my country generated a total of 1.593 billion tons of construction waste in 2017, and about 1.704 billion tons in 2018. However, the current overall recycling rate of construction waste is less than 10%, far lower than 90% in Europe and the United States and 95% in Japan and South Korea. According to the economic benefits of construction waste recycling and the construction waste recycling rate, the value of construction waste recycling in my country in 2018 is about 40.3 billion yuan. [0003] Therefore, through the reasonable recycling of waste concrete, it can not only reduce the pollution of waste concrete to the environment, but also save natural resources such as natural sand and grave...
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IPC IPC(8): E04C3/34E04C3/32
CPCE04C3/34E04C3/32
Inventor 杨洋邢翔
Owner YANGZHOU UNIV