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Tendon-free prestressed concrete structure

A concrete structure and prestressing technology, applied in the direction of structural elements, truss structures, building components, etc., can solve the problems of high cost and troublesome construction, and achieve the effect of low cost, simple structure and fast construction.

Inactive Publication Date: 2010-09-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the configuration of a large number of ordinary steel bars in prestressed reinforced concrete, the cost is high and the construction is troublesome

Method used

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  • Tendon-free prestressed concrete structure
  • Tendon-free prestressed concrete structure
  • Tendon-free prestressed concrete structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: The first unreinforced prestressed concrete structure

[0013] Such as figure 1 and figure 2 As shown: the unreinforced prestressed concrete structure includes a concrete body 1, and at least one through pipe is arranged on the upper and lower parts of the concrete body 1, and each pipe is pierced with more than one prestressed tendon 2, and the prestressed tendon draws After being straight, it is locked by the anchor 3; there is no ordinary steel bar inside the concrete body.

[0014] The prestressed tendons 2 are made of steel wire, steel strand or carbon fiber.

[0015] The anchor 3 is made of steel or alloy steel. The structure of the anchorage is: steel nut or steel clip.

[0016] Said pipeline adopts corrugated steel pipe or rubber pipe.

Embodiment 2

[0017] Embodiment 2: The second unreinforced prestressed concrete structure

[0018] Two through pipes are respectively arranged on the upper part and the lower part of the concrete body 1 .

[0019] Other technical schemes are the same as embodiment 1.

Embodiment 3

[0020] Embodiment 3: the preparation of the first unreinforced prestressed concrete structure

[0021] (1) Preparation of concrete body 1:

[0022] When preparing concrete 1, at least one pipeline is reserved at the upper and lower parts of the concrete body;

[0023] (2) Preparation of unreinforced prestressed concrete structure:

[0024] First, put more than one prestressed tendon 2 into each reserved pipeline, and then use a jack to apply tension, then plug anchorage 3 at both ends of each pipeline, and loosen the jack. At this time, the prestressed tendon 2 retracts, so that The anchor 3 is under compression, and the pressure is transmitted to the concrete body 1 to resist the tensile stress generated by the applied load.

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Abstract

The invention relates to a tendon-free prestressed concrete structure, which is formed in a way that the upper part and the lower part of a concrete body (1) are respectively provided with at least one through pipeline, each pipeline is penetrated by more than one prestressed tendon (2), the prestressed tendon is locked by anchorage devices (3) after being straightened up, and no regular reinforcement is arranged in the concrete body. The preparation method of the tendon-free prestressed concrete structure comprises the following steps: penetrating more than one prestressed tendon (2) in each pipeline reserved in the concrete body (1), applying tension with a jack, plugging the anchorage devices (3) at both ends of each pipeline, and releasing the jack. When the jack is released, the prestressed tendon (2) retracts to press the anchorage devices (3), and then, the pressure is passed to the concrete body for being used for resisting the tension stress generated by a service load. The invention has the advantages of simple structure, low cost, fast and convenient construction, stability, reliability and the like, and can ensure that the engineering structure can bear large force. The invention can be used for constructing various projects such as buildings, bridges, major dams and the like.

Description

technical field [0001] The invention relates to an engineering structure, that is, a prestressed concrete structure, in particular to an unreinforced prestressed concrete structure. Background technique [0002] At present, concrete materials or structures are widely used in civil construction, highway, railway, water conservancy and other projects. Concrete is a kind of artificial stone with high compressive strength, low cost, good durability and convenient construction, so it is an ideal engineering material. However, concrete has a big disadvantage, that is, its tensile strength is very poor, its tensile strength is about 1 / 18 to 1 / 8 of the cubic compressive strength, and the ultimate tensile strain is less than 1 / 20 of the ultimate compressive strain. It can only stretch 0.10-0.15mm per meter. Therefore, concrete is particularly suitable for making pressure-bearing members. However, there are very few purely pressure-bearing components in engineering, and more are be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/22E04C3/26E04C5/08E04C5/10E04C5/12E04G21/12
Inventor 杨吉新
Owner WUHAN UNIV OF TECH