Device for reinforcing UHPC-NC interface bonding by adopting perforated steel plates and using method

A technology of UHPC-NC and perforated steel plates, which can be applied to building reinforcements, structural elements, truss structures, etc., and can solve problems such as insufficient bonding

Pending Publication Date: 2020-10-27
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It solves the problem of insufficient bonding of the UHPC-NC interface, and can better study the mechanical properties of UHPC-NC composite beams

Method used

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  • Device for reinforcing UHPC-NC interface bonding by adopting perforated steel plates and using method
  • Device for reinforcing UHPC-NC interface bonding by adopting perforated steel plates and using method

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Embodiment Construction

[0021] In order to have a deeper understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0022] A device for strengthening UHPC-NC interface bonding by using perforated steel plates, making perforated steel plates 3 as connectors between UHPC1 and NC1 interfaces, the height of each steel plate is set at 8cm to 12cm, and the axis in the length direction of each steel plate Open the upper hole, the aperture should be half the height of the steel plate, the edge of the aperture should not be less than 2cm from the edge of the steel plate, the length of the steel plate should be 10cm to 20cm shorter than the length of the beam, and the thickness of the concrete protective layer between the longitudinal edge of the steel plate and the edge of the beam should not be less than 5cm;

[0023] In the device for strengthening UHP...

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Abstract

The invention belongs to the technical field of structural engineering, and particularly relates to a device for reinforcing UHPC-NC interface bonding by adopting perforated steel plates and a using method. Firstly, a high-quality steel plate is selected as a connecting piece raw material, and then the perforated steel plates (3) are manufactured as connecting pieces. When a UHPC-NC superposed beam is poured, 20 cm-30 cm of UHPC (1) is poured, two rows of perforated steel plates (3) are inserted in the length direction of the beam when the lower UHPC (1) is not completely solidified, wherein the length of the perforated steel plates (3) is 10 cm-20 cm smaller than the length of the beam, the transverse distance between the two rows of perforated steel plates is 1 / 3-1 / 2 of the width of thesuperposed beam, and the insertion depth is half the depth of the perforated steel plates (3). When the lower UHPC (1) is completely solidified, upper NC (2) is poured to form a superposed beam, and finally the UHPC-NC superposed beam is maintained. According to the device, the perforated steel plates (3) are inserted between the UHPC-NC connecting interfaces, so that the bonding strength of the UHPC-NC interfaces is improved, cooperative work of the two materials of the UHPC-NC superposed beam is facilitated, and the excellent characteristics of the UHPC-NC superposed beam are brought into full play.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a UHPC-NC (Ultra-High Performance Concrete and Normal Concrete, Ultra-High Performance Concrete, Ultra-High Performance Concrete, referred to as: UHPC, Normal Concrete, ie Ordinary concrete, referred to as: NC) interface bonding device and method of use. Background technique [0002] Concrete structures are widely used. It has been more than 100 years since Martin Hall, the first concrete building in my country, was built in Sun Yat-sen University in Guangzhou in 1906. Due to the influence of physical, chemical and human factors, many concrete structures are damaged to varying degrees, which becomes more and more obvious as time goes by. Under the influence of these factors, the structure has damage, cracking, exposed ribs, deformation and other diseases, which seriously affect the safety and durability of the structure. [0003] Ultra-high performanc...

Claims

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Application Information

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IPC IPC(8): E04C3/20E04C5/06
CPCE04C3/20E04C5/06
Inventor 端茂军宋粲魏洋李国芬薛锦春
Owner NANJING FORESTRY UNIV
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