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A prestress test method based on steel strand open anchorage

A test method and steel strand technology, applied in the testing of mechanical components, testing of machine/structural components, measuring devices, etc., to achieve the effects of simple operation, small loss of prestress, and good practical application value

Inactive Publication Date: 2016-05-11
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to provide a prestressing test method based on steel strand open-type anchorage, aiming at solving the need for engineering transformation, the need to remove the project at one end of the steel strand without affecting the prestressing of the remaining part problem of effect

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  • A prestress test method based on steel strand open anchorage

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specific Embodiment approach

[0054] The present invention is achieved in this way, a method for developing a prestressed steel strand open-type anchor. One end of the steel strand adopts an ordinary steel strand anchor, and a force sensor is installed to measure the stress of the steel strand. After tensioning with the prestressed front clip tension jack (YDC240QX type produced by Liuzhou Ovim), install the open anchorage, then loosen the tension jack, and install the open anchorage A and the open anchorage B respectively;

[0055] Concrete steps of the present invention are:

[0056] 1. Whether the open anchor can anchor the steel strand test

[0057] (1) Anchor A test

[0058] The first test of anchorage A: after the tension of the prestressed front clamping jack reaches 154kN, install and fasten the open anchorage A. After the jack is released, the force reading is 154kN, and the force reading is 153kN after 2 hours.

[0059] The second test of anchorage A: loosen the prestress after the first test i...

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Abstract

The invention discloses a pre-stress test method based on steel strand opening-type anchorage devices. The pre-stress test method based on the steel strand opening-type anchorage devices comprises the following steps that a common steel strand anchorage device is arranged at one end of a steel strand, and a force sensor is installed to be used for testing stress of the steel strand; after the other end of the steel strand is stretched through a pre-stress front clamping-type tensioning jack, the opening-type anchorage devices are installed at the other end of the steel strand; then the tensioning jack is loosened, and the opening-type anchorage device A and the opening-type anchorage device B are installed respectively. Through the unbounded pre-stress steel strand which is in the tensioned state, the newly developed anchorage devices are installed at certain positions, then the steel strand in the tensioned state between the new anchorage devices and an anchorage device to be disassembled is cut off, and losses of pre-stress, obtained through testing, of the steel strand are few. In addition, the pre-stress test method is simple in operation, and the anchorage devices are simple and practical and have very good practical application value.

Description

technical field [0001] The invention belongs to the technical field of mechanical anchor research, and in particular relates to a prestress test method based on a steel strand open anchor. Background technique [0002] For the unbonded prestressed steel strand in working state, due to the need of engineering transformation, it is necessary to remove the engineering at one end of the steel strand without affecting the prestressing effect of the remaining part, so this anchor is specially developed. In order to remove the anchor at one end, it is necessary to install a new anchor at a certain position of the unbonded prestressed steel strand in tension. During the construction process, the prestress loss of the steel strand should be minimized as far as possible. This is specially developed. Open type steel strand anchor. Contents of the invention [0003] The purpose of the embodiment of the present invention is to provide a prestressing test method based on steel strand o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 陈伯望沈蒲生胡习兵胡谷旺周建发
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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