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Post-tensioned unbonded prestressed concrete composite beam and its design and construction method

A technology of concrete and superimposed beams, applied in the directions of girders, joists, trusses, etc., to achieve the effects of enhancing integrity, increasing friction and occlusal force, and enhancing strength

Active Publication Date: 2021-11-05
上海同吉建筑工程设计有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 unbonded prestressed concrete composite beam and its design and construction method
  • Post-tensioned unbonded prestressed concrete composite beam and its design and construction method
  • Post-tensioned unbonded prestressed concrete composite beam and its design and construction method

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Experimental program
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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] see figure 1 — Figure 4A post-tensioned unbonded prestressed concrete composite beam is provided, the composite beam adopts a post-tensioning method to apply unbonded prestress to the composite beam, and a layer of top layer is arranged on the top of the composite beam Longitudinal reinforcement 1, a layer of bottom longitudinal reinforcement 5 is provided at the bottom of the composite beam, a composite layer 2 is provided at the top of the composite beam, and two layers of tie bars are provided at the middle of the composite beam 7. Waist bars 3 are arranged at the lower end of the tie bars 7 in each layer, a number of unbonded prestressed tendons 4 are arranged at the lower part of the composite beam, and hoops are arranged on the periphery of the composite beam Rib 6, the two ends of the post-tensioned unbonded prestressed tendon 4 protrude out ...

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Abstract

The invention relates to a post-tensioned non-bonded prestressed concrete composite beam and a construction method thereof. The composite beam is a kind of post-tensioned non-bonded beam applied to the entire beam after the composite beam is laminated and formed to meet the requirements of use. Bonded prestress. Compared with the traditional composite beam, it adopts post-tensioning unbonded 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 it can apply post-tensioned prestress after the overall construction, it is especially suitable for structures with high performance requirements such as large spans and heavy loads that require high deformation control and bearing capacity, and can also reflect the design requirements while meeting the design requirements. Advantages of prefabricated structures.

Description

technical field [0001] The invention relates to the technical field of civil engineering design, in particular to a multi-stage stretched prestressed concrete composite beam adopting unbonded post-tensioning in a large-span heavy-duty structure and a design and construction method thereof. 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 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/26E04C5/08E04G21/12
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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