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

A composite beam, unbonded technology for design optimization/simulation, joists, girders, etc.

Active Publication Date: 2022-02-01
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 co-tensioned prestressed concrete composite beam and its design and construction method
  • Post-tensioned unbonded co-tensioned prestressed concrete composite beam and its design and construction method
  • Post-tensioned unbonded co-tensioned prestressed concrete composite beam and its design and construction method

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0052] see figure 1 — Figure 4A post-tensioned unbonded co-tensioned prestressed concrete composite beam. The composite beam is pre-tensioned and post-tensioned to apply bonded and unbonded prestress to the composite beam. 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. Two layers of tie bars 8 are arranged in the middle, waist bars 3 are arranged at the lower end of each layer of tie bars 8, and several pre-tensioned prestressed tendons 5 are arranged at the bottom of the laminated beam. A number of unbonded prestressed tendons 4 are arranged at the lower part of the composite beam, and stirrups 7 are arranged on the periphery of the composite beam, a...

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Abstract

The invention relates to a post-tensioned unbonded co-tensioned prestressed concrete composite beam and its design and construction method. A new type of prestressed composite beam with bonded and unbonded prestress applied by pretensioning and posttensioning process. Compared with the traditional prestressed composite beam, it adopts post-tensioned unbonded prestressing technology, which not only inherits the characteristics of high prefabrication and convenient construction of the lower composite structure, but also has its unique advantages, which can improve the crack resistance of components Bending performance, stretching in batches to meet the structural needs of different periods, and can cooperate with the design of assembled integral prestressed node connections to enhance the integrity and seismic performance of the structure, especially suitable for large spans with high requirements for deformation control and bearing capacity In the structure with high performance requirements such as heavy load and heavy load, 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 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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Patent Type & Authority Patents(China)
IPC IPC(8): E04C3/26G06F30/13G06F30/23
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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