Friction type high-strength bolt capable of monitoring and controlling pretension force, connecting piece and construction method thereof

A high-strength bolt and pre-tension technology, applied in the direction of connecting components, threaded fasteners, screws, etc., can solve the problems of increasing engineering costs and reducing utilization, saving labor costs, enhancing utilization, and high prefabrication. Effect

Inactive Publication Date: 2018-01-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For friction-type high-strength bolts, since the pre-tension force of the bolt cannot be accurately measured and controlled, the design value of the shear capacity of friction-type high-strength bolt connections is: is relatively low, in order to increase the shear bearing capacity of bolts, we can only start from the anti-slip coefficient μ of the friction surface and the pre-tension P, which seriously reduces the utilization rate of materials, thereby greatly increasing the engineering cost, and the reason is traced , which is caused by the unmonitored and controlled pretension of high-strength bolts

Method used

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  • Friction type high-strength bolt capable of monitoring and controlling pretension force, connecting piece and construction method thereof
  • Friction type high-strength bolt capable of monitoring and controlling pretension force, connecting piece and construction method thereof
  • Friction type high-strength bolt capable of monitoring and controlling pretension force, connecting piece and construction method thereof

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Embodiment Construction

[0054] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] Figure 1a with Figure 1b Schematic diagram of a stud shear connection for a prior art beam or slab setup. It can be seen from the figure that the shear connector needs to be welded on the beam or plate, which is labor-intensive and wastes material.

[0056] Therefore, a friction-type high-strength bolt that can monitor and control pretension is provided, such as Figure 2-Figure 10 As shown, it includes a screw section 302 provided with at least one threaded portion, a first nut 301 and a second nut 303 screwed to the screw section, a semiconductor sleeve set on the screw section and located between the first nut and the second nut Spring 305, a sleeve 304 sleeved on the outer periphery of the semiconductor spring, a positive and negative metal sheet 307 that is arranged on one side of the first nut or the second nut and can be c...

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Abstract

The invention discloses a friction type high-strength bolt capable of monitoring and controlling pretension force, a connecting piece and a construction method thereof. The high-strength bolt comprises a nut, a thread section, a nut, an outer sleeve and a semiconductor spring; a clamping groove is formed in the top face of the nut, the nut, the outer sleeve and the semiconductor spring are sequentially connected into a whole in a preset mode during prefabrication, the nut is screwed from one end of the thread section, the semiconductor spring, the outer sleeve and the nut are sleeved from theother end of the thread section, the semiconductor spring and the clamping groove in the top face of the nut are clamped, and the nut and the thread section are in threaded connection; different subregions are arranged on the thread section to primarily control pretension force, and a built-in circuit is arranged to accurately control pretension force. A traditional force transmission mode is changed by the bolt, the pretension force can be monitored and controlled, the bolt can be adjusted in real time according to change of the pretension force, and shear capacity and rigidity of the connecting position and connection reliability are ensured.

Description

technical field [0001] The invention relates to a shear connector and a construction method thereof, in particular to a friction-type high-strength bolt capable of monitoring and controlling pretension, a connector and a construction method thereof. Background technique [0002] Existing high-strength bolts are mainly divided into friction-type high-strength bolts and pressure-bearing high-strength bolts. When high-strength friction bolts are subjected to shear force, the external shear force reaches the maximum friction resistance that may occur between the plates as the limit state. When the maximum friction resistance is exceeded and the plates slip relative to each other, the connection is considered to have failed and is destroyed; When the pressure-bearing high-strength bolts are sheared, the friction force is allowed to be overcome to cause relative slippage between the plates, and then the external force can continue to increase, and the final failure of the screw sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/04F16B37/00G01L5/00
Inventor 伍凯南洋徐超徐佳楠陈峰
Owner HOHAI UNIV
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