FRP rib seawater sea sand-ultra high ductile cementitious composites (UHDCC) composite beam and construction method thereof

A composite beam and seawater technology, applied in the direction of joists, girders, truss beams, etc., can solve the problems of poor ductility and crack resistance, and achieve the effects of improving bending resistance, increasing strength, and increasing friction

Inactive Publication Date: 2018-11-16
TONGJI UNIV
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Problems solved by technology

Although FRP bars have good corrosion resistance and material mechanical properties, FRP bars are linear elastic materials, and there is no yield platform similar to steel bars, so the bending failure of FRP bar concrete beams is brittle failure, poor ductility, and resistance. Crack is not prominent

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  • FRP rib seawater sea sand-ultra high ductile cementitious composites (UHDCC) composite beam and construction method thereof
  • FRP rib seawater sea sand-ultra high ductile cementitious composites (UHDCC) composite beam and construction method thereof

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0035] A FRP reinforced seawater sea sand-UHDCC composite beam, in which UHDCC (Ultra-high DuctileCementitious Composites, ultra-high ductility cement-based composites) overcomes the softening performance of traditional cement-based materials under tensile loads, and behaves similar to metal materials The pseudo-hardening characteristics of the traditional cement-based materials can achieve a breakthrough from the single-crack macro-crack development mode to the multiple micro-crack steady-state cracking mode. It has significant nonlinear deformation, excellent crack resistance, ductil...

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Abstract

The invention relates to an FRP rib seawater sea sand-ultra high ductile cementitious composites ( UHDCC) composite beam and a construction method thereof. The composite beam comprises a beam body anda FRP rib skeleton arranged in the beam body, wherein the FRP rib skeleton comprises FRP tensile longitudinal ribs, FRP erecting ribs and FRP stirrups, and the FRP tensile longitudinal ribs and the FRP erecting ribs are distributed in the direction of the beam body. The FRP stirrups are disposed between the FRP tensile longitudinal ribs and the FRP erecting ribs and connected with the FRP tensilelongitudinal ribs and the FRP erecting ribs. The beam body comprises a seawater sea sand concrete layer made of seawater sea sand concrete and a composite material layer made of ultra-high ductile cementitious composites, and the FRP tensile longitudinal ribs are located in the composite material layer. Compared with the prior art, the bottom of a seawater sea sand concrete beam is replaced by the composite material layer made of the ultra-high ductile cementitious composites, the bending resistance of the FRP rib seawater sea sand beam and the distribution form of cracks in the beam can be improved, and the crack width is reduced.

Description

technical field [0001] The invention relates to an engineering structure technology, in particular to an FRP bar seawater sea sand-UHDCC composite beam and a construction method thereof. Background technique [0002] Based on the advantages of light weight, high strength and good corrosion resistance of FRP bars, FRP bars are used to replace steel bars, and ordinary water and river sand are replaced with seawater and sea sand to make FRP bar seawater and sea sand concrete components without pre-treatment of seawater and sea sand. It is of great significance to alleviate the crisis of river sand resource depletion and solve the problem of corrosion and failure of steel bars in the marine environment. At the same time, it has a good application prospect of marine environmental engineering and potential social and economic benefits. Although FRP bars have good corrosion resistance and material mechanical properties, FRP bars are linear elastic materials, and there is no yield p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/20
CPCE04C3/20
Inventor 江佳斐罗洁汪智晨熊海贝
Owner TONGJI UNIV
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