The method of using frp bars to replace steel mesh sheets

A technology of steel mesh and reinforcement mesh, which is applied in the field of replacing steel mesh with FRP bars, can solve the problems of increasing maintenance costs, and the structural durability cannot be guaranteed, and achieves the effect of large specific modulus and high specific strength.

Active Publication Date: 2015-09-09
CHINA CONSTR EIGHT ENG DIV CORP LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, for structures that use steel mesh for reinforcement in saline-alkali environments and marine environments, the durability of the structure cannot be guaranteed due to corrosion by chloride ions and climate environments.
Long-term maintenance costs cause a large increase in later maintenance costs

Method used

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  • The method of using frp bars to replace steel mesh sheets
  • The method of using frp bars to replace steel mesh sheets
  • The method of using frp bars to replace steel mesh sheets

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Embodiment Construction

[0027] In order to facilitate the understanding of the structure of the present invention, the following description will be made in conjunction with the accompanying drawings and embodiments.

[0028] combine figure 1 and figure 2 Shown, the present invention utilizes FRP bar to replace the method for steel mesh sheet, and its steps comprise:

[0029] Determine the physical parameters of the steel mesh to be replaced: diameter Ds, spacing Ss in two directions, number of roots NS and modulus Es;

[0030] Select the FRP bar and determine its modulus E frp ; And set its physical parameters: the diameter is D frp , the spacing is S frp , root number N frp and modulus E frp ;

[0031] The stiffness of the steel mesh in the same direction before and after being replaced by the FRP mesh must be equal, that is, the section stiffness Ks of all steel bars in the same direction = EsAs and the section stiffness K of all FRP bars in the same direction frp =E frp A frp Equal, Es...

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Abstract

The invention provides a method to replace a reinforcing mesh piece with fiber reinforce plastic (FRP) ribs. The method includes the steps of confirming physical parameters of the to-be-replaced reinforcing mesh piece, choosing the FRP ribs, building a first mathematic model based on the principle that rigidity of an FRP rib mesh piece and rigidity of the reinforcing mesh piece in the same direction are identical; building a second mathematic model based on the principle that the total interval of the FRP rib mesh piece and the total interval of the reinforcing mesh piece are equal; plugging the physical parameters of the reinforcing mesh piece into the first mathematic model and the second mathematic model to obtain the physical parameters of the FRP rib mesh piece; and finishing on-site binding of the FRP rib mesh piece based on the obtained physical parameters of the FRP rib mesh piece. Rigidity equality is carried out on existing concrete reinforcement parameters to obtain the design parameters of the FRP rib, secondary design by means of repeated use of loading conditions is avoided, and quick design is achieved through simple mathematic substitution.

Description

technical field [0001] The invention relates to the reinforcement technology of FRP bars in concrete during civil engineering construction, in particular to a method for using FRP bars to replace reinforcement mesh sheets. Background technique [0002] At present, for structures that use steel mesh for reinforcement in saline-alkali environments and marine environments, the durability of the structure cannot be guaranteed due to corrosion by chloride ions and climate environments. Long-term maintenance costs cause a substantial increase in later maintenance costs. FRP has the characteristics of radiation resistance, corrosion resistance, high specific modulus and specific strength, and is widely used in civil engineering. The present invention aims to provide a design method for reinforcing concrete by using FRP bars instead of steel bars in the above high-density corrosion areas. Contents of the invention [0003] In order to overcome the defects in the prior art, a met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02E04G21/12
Inventor 马明磊王桂玲苗冬梅
Owner CHINA CONSTR EIGHT ENG DIV CORP LTD
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