Post-tensioned slow bonded co-tensioned prestressed concrete composite beam and its design and construction method

A technology of slow bonding of prestressed and concrete, applied in the direction of joists, girders, trusses, etc., to achieve the effect of increasing stiffness, improving weather resistance, and improving crack resistance and bending resistance.

Active Publication Date: 2021-07-20
上海同吉建筑工程设计有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the pretensioning construction technology can ensure the effective bonding force between the prestressed tendons and the concrete, and the construction is simple, but it is only suitable for the industrial production of small and medium-sized components.

Method used

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  • Post-tensioned slow bonded co-tensioned prestressed concrete composite beam and its design and construction method
  • Post-tensioned slow bonded co-tensioned prestressed concrete composite beam and its design and construction method
  • Post-tensioned slow bonded co-tensioned prestressed concrete composite beam and its design and construction method

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Embodiment Construction

[0072] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0073] see Figure 1-Figure 4 Shown is a co-tensioned prestressed concrete composite beam with post-tensioning and slow bonding. A layer of top longitudinal reinforcement 1 is provided on the top of the composite beam, a layer of bottom longitudinal reinforcement 6 is provided at the bottom of the composite beam, and a composite layer 2 is provided on the top of the composite beam, as figure 1 As shown, the upper part of the dotted line is the composite layer 2, and the lower part of the dotted line is the concrete prefabricated component. Two layers of tie bars 8 are arranged in the middle of the composite beam, waist bars 3 are arranged at the lower end of each layer of tie bars 8, and several pre-tensioned prestressed bars are arranged at the bottom of the composite beam. Rib 5, a number of slow-bonded prestressed tendons 4 are arranged at the bottom of ...

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Abstract

The invention relates to a co-tensioned prestressed concrete composite beam with post-tensioning and slow bonding and its design and construction method. A new type of prestressed composite beam with bonded and slow bonded prestressed by pre-tensioning and post-tensioning processes. Compared with the traditional prestressed composite beam, it adopts the post-tensioning slow bonding prestressing technology, which not only inherits the characteristics of high prefabrication and convenient construction of the lower composite structure, but also improves the crack resistance and bending resistance of the components. Because the configuration of its prestressed tendons is relatively more flexible and the post-tensioned slow bonded prestressed tendons have better anti-corrosion properties, it is especially suitable for long-span and heavy-duty applications that require high deformation control, bearing capacity and weather resistance. In the structure with high performance requirements, it can also reflect the superiority of the assembled structure while meeting the design requirements.

Description

technical field [0001] The invention relates to the technical field of civil engineering design, in particular to a multi-stage tensioned prestressed concrete composite beam and its construction method in a large-span heavy-duty structure that is tensioned after slow bonding. Background technique [0002] In recent years, with the improvement of my country's construction technology, the corresponding construction level has also become higher and higher. There are new concepts and requirements in terms of architectural beauty, architectural quality, construction efficiency, green, low-carbon and energy-saving buildings, etc. However, the labor cost of manpower and the environmental impact control requirements during the construction process will also increase, which will not be a small test for the improvement of the construction level. The industrialization of construction has attracted more and more attention because its integrated production mode of design and constructio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/26
Inventor 熊学玉肖启晟汪继恕熊斌
Owner 上海同吉建筑工程设计有限公司
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