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Structure for reinforcing UHPC-NC interface bonding through spiral steel bars and manufacturing method

A technology of UHPC-NC and spiral steel bars, which is applied to structural elements, building reinforcements, building components, etc., can solve problems such as insufficient bonding, and achieve the effect of insufficient bonding

Inactive Publication Date: 2021-06-11
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Structure for reinforcing UHPC-NC interface bonding through spiral steel bars and manufacturing method
  • Structure for reinforcing UHPC-NC interface bonding through spiral steel bars and manufacturing method

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Embodiment Construction

[0022] 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.

[0023] Referring to the accompanying drawings, in an example of the present invention, a structure and a manufacturing method for strengthening UHPC-NC interfacial bonding using spiral steel bars. The spiral steel bar 3 is used as the connector between the interface of UHPC1 and NC2, which is composed of the lower layer UHPC1, the upper layer NC2 and the spiral steel bar 3.

[0024] The above-mentioned structure uses spiral steel bars to strengthen the bonding of the UHPC-NC interface, and the spiral steel bars 3 are made of high-quality high-strength steel bars.

[0025] In the structure of the UHPC-NC interface bonding reinforced by spiral steel bars, the nominal diameter of the spiral steel bar 3 is 1 / 3 to 1 / 5 of the height of ...

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Abstract

The invention belongs to the field of structural engineering, and particularly relates to a structure for reinforcing UHPC-NC interface bonding through spiral steel bars and a manufacturing method. Firstly, high-quality steel bars are selected as connecting piece raw materials, and then spiral steel bars (3) are manufactured as connecting pieces. When a UHPC-NC composite beam is poured, 20-30 cm UHPC (1) is poured, when the lower UHPC (1) is not completely solidified, the spiral steel bars (3) are vertically inserted in the corresponding positions in the length direction of the beam, the thickness of a concrete protection layer of the edge of the longitudinal section of the beam and the spiral steel bars (3) is 5-10 cm, the transverse distance between the spiral steel bars (3) is 1 / 3-1 / 2 of the width of the composite beam, and the insertion depth is half of the diameter of the spiral steel bars (3). And when the lower UHPC (1) is completely solidified, the upper NC (2) is poured to form the superposed beam, and finally the UHPC-NC superposed beam is maintained. According to the structure, the spiral reinforcing steel bars (3) are used between UHPC-NC connection interfaces for connection; and the bonding strength of the UHPC-NC interface is improved, so that the cooperative work capability of the two materials of the UHPC-NC superposed beam is improved.

Description

technical field [0001] The invention belongs to the field of structural engineering, and specifically 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, or ordinary concrete, which is reinforced by spiral steel bars. Abbreviation: NC) interface bonding structure and manufacturing method. Background technique [0002] Concrete is one of the most important civil engineering materials today. Concrete has the characteristics of abundant raw materials, low price, and simple production process, so its usage is increasing. In addition, concrete also has the characteristics of high compressive strength, good durability, and a wide range of strength grades, so its application range is also very wide. Therefore, designing and making concrete according to the predetermined performance, and developing new types of concrete with light weight, high strength an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/03
CPCE04C5/03
Inventor 端茂军宋粲薛锦春孙旺徐绍斌朱文广
Owner NANJING FORESTRY UNIV
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