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

A concrete, unbonded technology applied to joists, girders, trusses, etc. to achieve improved weather resistance

Active Publication Date: 2019-06-11
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 design and construction method thereof.
  • Post-tensioned unbonded prestressed concrete composite beam and design and construction method thereof.
  • Post-tensioned unbonded prestressed concrete composite beam and design and construction method thereof.

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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 unbonded prestressed concrete composite beam and a construction method thereof. According to the post-tensioned unbonded prestressed concrete composite beam,post-tensioned unbonded prestress is applied to a whole beam after the composite beam is composited and formed to meet the use requirement. Compared with a traditional composite beam, post-tensioned unbonded prestressed technology is adopted, the characteristics of a lower composite structure, such as high prefabricated fabricated degree and convenient construction are inherited, the crack resistance and bending resistance of the elements are improved. Due to ability to apply post-tensioned prestress after overall construction, the post-tensioned unbonded prestressed concrete composite beam isespecially suitable for structures with high performance requirements such as large span and heavy load which require high deformation control and bearing capacity, and can further embody the advantages of fabricated structures 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 adopting unbonded post-tensioning in a large-span heavy-duty structure and a 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 and construc...

Claims

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Application Information

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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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