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Inside anchorage zone reinforcing bars construction method of post-stressed concrete structure

A technology of concrete structure and design method, applied in the direction of structural elements, building components, building structure, etc., can solve the problems of cumbersome process, no clear design reinforcement method, inconvenient for designers to use, etc. Effect

Inactive Publication Date: 2009-08-05
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using this model to analyze the internal force of the internal anchorage area is cumbersome and does not give a clear design reinforcement method, which is not convenient for designers to use

Method used

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  • Inside anchorage zone reinforcing bars construction method of post-stressed concrete structure
  • Inside anchorage zone reinforcing bars construction method of post-stressed concrete structure
  • Inside anchorage zone reinforcing bars construction method of post-stressed concrete structure

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Embodiment Construction

[0024] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0025] Embodiment The post-tensioned prestressed concrete slab adopting the internal anchoring method is taken as an example. The calculation parameters of the concrete slab are as follows: in the longitudinal calculation plane, the transverse dimension of the concrete slab is B (hereinafter referred to as the dimension of the concrete slab B), the transverse dimension of the anchorage bearing plate is b (hereinafter referred to as the dimension of the bearing plate b), and the dimension ratio b / B=0.3, P is the prestressed load. According to the method of the present invention, t...

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Abstract

A post-tensioned prestressed concrete structure internal anchorage area reinforcement design method, the steps are: the first step, dividing the scope of the internal anchorage area; the second step, determining the internal force ratio-size ratio b / B curve of the anchorage area; third The first step is to construct the tension and compression model of the internal anchorage area according to the internal force ratio-size ratio b / B curve of the anchorage area. If the size ratio b / B≤1 / 9, use the model of the International Prestressing Association directly, otherwise the International Prestressing Association model is used. The association model is adjusted or corrected; the fourth step is the reinforcement mode of the internal anchorage area. The modified model according to the present invention can save nearly 30% of common steel bars in the anchorage area. The invention is applicable to the reinforcement design of the inner anchorage area of ​​all post-tensioned prestressed structures.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a design method for reinforcing bars in an internal anchorage area of ​​a post-tensioned prestressed concrete structure. Background technique [0002] In recent years, prestressing technology has been widely used in construction projects such as tunnels, bridges, and municipal structures. Whether the anchorage area is safe or not is the key technology of prestressed concrete. In post-tensioned prestressed concrete members, the anchorage area can be divided into end anchorage area and internal anchorage area according to the position of anchorage. For the end anchorage area, cracks parallel to the prestressed axis often appear in the anchorage area after the construction tension process. In order to effectively control the development of these cracks, "Code for Design of Concrete Structures" (GB 50010-2002) has made structural regulations for strength...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/12E04C5/12E04C5/00
Inventor 赵建立沈水龙
Owner SHANGHAI JIAOTONG UNIV