Prestressed fibre reinforced steel concrete structure and its prestressed construction method
A technology of concrete structure and reinforced concrete, applied in building structure, construction and other directions, can solve the problems of underutilized plastic properties of steel, poor tensile properties, small spanning ability, etc., to achieve high stiffness, light weight, large The effect of leapfrog
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[0033] Below in conjunction with embodiment, further illustrate the present invention.
[0034] as attached Figure 6 The shown test beam member adopts a structure formed by welding a channel steel 7 on the upper wing plate 6 of the I-shaped steel 5. The height of the combined structure is 140 mm, and the width of the lower wing plate 3 is 68 mm. The width of the channel steel 7 is 63mm, and the length of the test beam is 2m. The construction steps of pre-bending and pre-stressing technology of reverse loading and then forward loading of the test beam:
[0035] 1. Reverse loading prebending prestressing construction steps:
[0036] In order to facilitate the loading and pasting of carbon fiber cloth, the test beam member was turned over 180 degrees, and a single-point loading scheme was adopted.
[0037] ① Reversely load the section steel composite structure so that the lower flange 3 is under tension and reaches 0.9 times the yield strain of the steel, and the load is sust...
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