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Pre-tensioned deformed reinforced concrete precast main beam

A technology of pretensioning and reinforced concrete, applied in the direction of joists, girders, truss beams, etc., can solve the problems of troublesome beam manufacturing, affecting the bending strength, and weakening of the compressive section, so as to reduce the self-weight, facilitate hoisting and transportation, and reduce the Effect of Lifting Capacity Requirements

Inactive Publication Date: 2013-01-02
杨众 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the prefabricated main girder used for laying the secondary beam usually adopts a gap at the junction of the distance section and the secondary beam, so that the laying head of the secondary beam is placed on this gap, or a prefabricated main beam disclosed in ZL201020553626.2 patent. There are holes that can pass through the secondary beam reinforcement, and the primary and secondary beams are integrated after the concrete is poured and tamped. It is more troublesome, and it will also weaken the compressive section of the prefabricated main girder when the prestress is released, which will affect the flexural strength of the beam during construction
An inverted T-shaped prefabricated main girder that can be conveniently shelved without shelving the pick-up beam and the secondary beam has not been reported

Method used

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  • Pre-tensioned deformed reinforced concrete precast main beam
  • Pre-tensioned deformed reinforced concrete precast main beam
  • Pre-tensioned deformed reinforced concrete precast main beam

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Embodiment Construction

[0026] see Figure 1 to Figure 4 , in the embodiment of a pre-tensioned special-shaped reinforced concrete prefabricated main girder provided by the present invention, the girder body is an inverted T-shaped section composed of a horizontal rectangular compression part 1 and a vertical rectangular shear part 2, and the vertical The rectangular shear part 2 is embedded with a rectangular stirrup 3, and part of the rectangular stirrup 3 protrudes from the upper surface of the vertical rectangular shear part 2, and the horizontal rectangular compressive part 1 is embedded with a U-shaped stirrup 4. The upper part of the U-shaped stirrup 4 protrudes from the upper surface of the horizontal rectangular compression part 1 for a certain length, and the steel strand 5 is embedded in the horizontal rectangular compression part 1 . The present invention sets the prefabricated beam into an inverted T-shaped structure, in which the horizontal rectangular compression-resistant part 1 can m...

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Abstract

The invention discloses a pre-tensioned deformed reinforced concrete precast main beam. The pre-tensioned deformed reinforced concrete precast main beam is characterized in that a beam body has an inverted T-shaped section and is composed of a horizontal rectangular compression-resistant part and a vertical rectangular shearing-resistant part; stirrups are embedded in the vertical rectangular shearing-resistant part; parts of the stirrups stretch out of an upper surface of the vertical rectangular shearing-resistant part; U-shaped stirrups are embedded in the horizontal compression-resistant part; U-shaped stirrup upper parts having certain length stretch out of an upper surface of the horizontal compression-resistant part; and steel strands are embedded in the horizontal compression-resistant part. A step of the pre-tensioned deformed reinforced concrete precast main beam having the inverted T-shaped section can be straightly provided with a secondary beam so that secondary beam installation is convenient. In construction, when a temporary support is arranged at a lower part of the secondary beam, no additional rebars are arranged at a loading step.

Description

technical field [0001] The invention relates to a building prefabricated component, in particular to a prefabricated beam used for a frame composite beam as a main beam. Background technique [0002] At present, the prefabricated main girder used for laying the secondary beam usually adopts a gap at the junction of the distance section and the secondary beam, so that the laying head of the secondary beam is placed on this gap, or a prefabricated main girder disclosed in ZL201020553626.2 patent. There are holes that can pass through the secondary beam reinforcement, and the primary and secondary beams are integrated after the concrete is poured and tamped. It is more troublesome, and it will also weaken the compressive section of the prefabricated main girder when the prestress is released, which will affect the flexural strength of the beam during the construction stage. A kind of inverted T-shaped prefabricated main girder that can be conveniently shelved without shelving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/26E04C5/08
Inventor 杨峰
Owner 杨众
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