Novel prestressed steel pipe-concrete composite beam
A prestressed steel and concrete technology, applied in building components, floors, buildings, etc., can solve the problems of large deformation and easy cracking of composite beams, and achieve the effects of improving bearing capacity, reducing self-weight, and achieving significant economic benefits.
Inactive Publication Date: 2011-02-02
北京京诚华宇建筑设计研究院有限公司
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Problems solved by technology
[0002] Steel-concrete composite beams have the characteristics of high bearing capacity, good ductility, and high rigidity, and have been widely used in bridges, industrial and civil buildings. However, composite beams also have disadvantages such as large deformation and easy cracking in negative moment areas.
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[0014] Embodiment: the lower flange of the steel beam (1) is a steel pipe (3), and several straight steel cables (4) are arranged inside the steel pipe (3), and then the prestressed steel cables (4) sprayed with fireproof and anti-corrosion coatings in advance are stretched After tensioning, both ends of the steel pipe are sealed, shear connectors such as studs (5) are arranged on the top of the steel beam, and finally the concrete slab (2) is poured.
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The invention relates to a novel prestressed steel pipe-concrete composite beam, and belongs to the technical field of building structure engineering. The prestressed composite beam mainly comprises a steel beam (1) and a concrete floor slab (2) poured on the steel beam, and is characterized in that: a bottom flange of the steel beam is a steel pipe (3); a plurality of linear steel ropes (4) are arranged in the steel pipe; after the prestressed steel ropes are strained, two ends of the steel pipe (3) are sealed; and the concrete floor slab (2) is poured. Compared with a steel beam and a common composite beam, the novel composite beam has the advantages of great reduction of midspan deflection and steel beam section stress, easy strain of the steel ropes, effective anticorrosion and fire prevention, simple and convenient construction and remarkable economic benefits.
Description
technical field [0001] The invention is a novel prestressed steel pipe-concrete composite beam, which belongs to the technical field of structural engineering. Background technique [0002] Steel-concrete composite beams have the characteristics of high bearing capacity, good ductility, and high rigidity, and have been widely used in bridges, industrial and civil buildings. However, composite beams also have disadvantages such as large deformation and easy cracking in negative moment areas. . The use of steel pipe prestressed composite beam is an effective way to solve the above problems. Combining steel pipe prestressing technology with ordinary composite beams, prestressing steel pipes in composite beams forms prestressed composite beams. Prestressed composite beams have the advantages of ordinary composite beams and prestressed structures at the same time, making full use of the strength of materials, increasing the bearing capacity of components, improving the stress s...
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IPC IPC(8): E04B5/29
Inventor 王立军余海群孙雅欣谭晋鹏江源
Owner 北京京诚华宇建筑设计研究院有限公司
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