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Technology for reduction of beam section height by use of unbonded steel strand prestress

A technology of section height and steel strands, applied in the direction of joists, girders, truss beams, etc., can solve the problems of blank reinforcement treatment methods, and achieve the effects of simple construction, simple construction safety and short construction period

Inactive Publication Date: 2016-05-11
项剑锋
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Problems solved by technology

The reinforcement treatment method in this case is still blank

Method used

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  • Technology for reduction of beam section height by use of unbonded steel strand prestress
  • Technology for reduction of beam section height by use of unbonded steel strand prestress
  • Technology for reduction of beam section height by use of unbonded steel strand prestress

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] see Figure 1-8 , in the embodiment of the present invention, the technique of reducing beam section height by prestressing unbonded steel strands includes the technology of reducing beam section height by external prestressing of unbonded steel strands and reducing the height of beam sections by internal prestressing of unbonded steel strands. Trabecular section height technology.

[0028] Unbonded steel strand external prestressing technology to redu...

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Abstract

The present invention discloses a method for reduction of beam section height by use of unbonded steel strand prestress, the method comprises reduction of the beam section height by use of external prestress and reduction of the beam section height by use of internal prestress, when the number of desired steel strands is not more than 6, or the number of desired steel strands is more than 6, but anchoring of both ends can be treated, an external prestress method is used; and when the number of the desired steel strands is greater, and anchoring of ends of the steel strands cannot be treated, an internal prestress method is used. The method is simple in construction, uninstall and additional arrangement of a temporary support are not needed, construction period is short, cost is low, an upper structure is not affected, and the method has the advantages that service life is synchronous with that of an original structure.

Description

technical field [0001] The invention relates to the field of construction engineering transformation, in particular to the technology for reducing the cross-sectional height of beams by prestressing unbonded steel strands, the technology for reducing the cross-sectional height of beams by separate external prestressing and the technology for reducing the cross-sectional height of beams by internal prestressing. Background technique [0002] Reinforced concrete girders are the components that bear the load of the floor slab. When it is necessary to reduce the section height of the beam, the positive reinforcement of the beam must be removed, leaving only the negative reinforcement. The bearing capacity of the beam will inevitably be insufficient, and the stiffness of the beam will also be severely insufficient. The reinforcement treatment method in this case is still blank at present. Contents of the invention [0003] The object of the present invention is to provide a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/26E04C5/08
CPCE04C3/26E04C5/08
Inventor 项剑锋
Owner 项剑锋
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