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Structure for reinforcing UHPC-NC interface bonding through I-shaped steel and using method

A UHPC-NC, interface bonding technology, used in bridge materials, architecture, bridge construction, etc., can solve problems such as insufficient bonding, achieve good mechanical properties, and solve the effect of insufficient bonding

Pending Publication Date: 2021-06-08
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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  • Structure for reinforcing UHPC-NC interface bonding through I-shaped steel and using method
  • Structure for reinforcing UHPC-NC interface bonding through I-shaped steel 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] Please refer to the attached figure 1 ~ attached figure 2 , in the example of the present invention, a structure and method of using I-beams to strengthen UHPC-NC interface bonding, select high-quality high-strength low-alloy light steel raw materials and roll them into I-beams 1, and the cross-sectional width of I-beams 1 is stacked 1 / 3~1 / 2 of the width of the composite beam, the length is 15cm~20cm shorter than that of the composite beam, the thickness of the flange and the web is set at 2cm~3cm, and the section height is 1 / 2 of the beam height. In order to make the I-beam The flange of 1 is located in the middle of the two beams, and the thickness of the concrete protective layer between the edges of I-beam 1 and the e...

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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 I-shaped steel and a using method. High-quality high-strength low-alloy light steel raw materials are selected to be rolled into I-shaped steel (1). When the UHPC-NC superposed beam is poured, the UHPC (2) with the thickness ranging from 20 cm to 30 cm is firstly poured, half of the UHPC (2) is poured and flattened, then one side, with flanges, of the I-shaped steel is horizontally placed on the UHPC (2), the width of the section of the I-shaped steel (1) is 1 / 3-1 / 2 of the width of the superposed beam, then the rest of the UHPC (2) is poured to complete pouring of the UHPC (2), after the UHPC (2) is completely solidified, the NC (3) on the upper portion is poured to form the superposed beam, and finally the UHPC-NC superposed beam is maintained. By means of the method that the I-shaped steel (1) is placed in the poured concrete of the two different materials, the bonding strength of the UHPC-NC interface 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 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, ie Ordinary concrete (abbreviation: NC) interface bonding structure and application method. Background technique [0002] Ultra-high performance concrete, referred to as UHPC (Ultra-High Performance Concrete), also known as reactive powder concrete (RPC, Reactive Powder Concrete), is the most innovative cement-based engineering material in the past 30 years. Big leap. The so-called ultra-high of UHPC refers to ultra-high durability and ultra-high mechanical properties. The use of UHPC can effectively reduce the structural weight. Under the premise of the same bending resistance, the structural self-weight of UHPC is only the self-weight of ordinary concrete. 1 / 3~1 / 2, almost similar to t...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D21/00E01D101/26
CPCE01D19/00E01D21/00E01D2101/268
Inventor 端茂军薛锦春宋粲李国芬徐绍斌
Owner NANJING FORESTRY UNIV
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