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

A concrete structure and prestressing technology, applied to structural elements, buildings, building components, etc., can solve problems such as inconvenient use by designers, cumbersome process, and no clear design reinforcement method

Inactive Publication Date: 2008-05-07
SHANGHAI JIAO TONG UNIV
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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

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Embodiment Construction

[0026] 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.

[0027] 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

The invention relates to a reinforcement bar construction method inside anchorage zone of pre-stressed concrete structure by way of post-tension, the procedure comprises the following steps: first, dividing the inner anchorage zone range; second, determining the anchorage zone internal force ratio-size ratio b / / B curve; third, establishing the compression model of the inner anchorage zone according to the anchorage zone inner force ratio-size ratio b / B curve, if the size ratio b / B is less than or equal to 1 / 9, the international pre-stressing institution model is used directly, or the international pre-stressing institution mode is adjusted or modified;fourth, reinforcing bar model of the inner anchorage zone. The invention has the advantages that 30 percent of the anchorage zone common reinforced bars are saved, according to the modified model in the invention; the invention is suitable for inner anchorage zone reinforced bar design of construction adopting the post-tensioned method.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a reinforcement construction method for 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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IPC IPC(8): E04G21/12E04C5/12E04C5/00
Inventor 赵建立沈水龙
Owner SHANGHAI JIAO TONG UNIV
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