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Hybrid fiber reinforced resin composite material/concrete combination structure and method for manufacturing the same

A technology of mixed fiber and reinforced resin, applied in the field of concrete composite beam structure design, can solve problems such as local damage, difficulty in obtaining structural performance, and local peeling

Active Publication Date: 2008-01-16
江苏绿材谷新材料科技发展有限公司
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Problems solved by technology

This not only causes high cost, but also affects the popularization and application of this structure, and the existence of shear bonds is likely to cause stress concentration in the concrete. Partial peeling, it is difficult to obtain the desired structural properties
In addition, the problem of local instability of FRP in the compression zone has not been well resolved

Method used

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  • Hybrid fiber reinforced resin composite material/concrete combination structure and method for manufacturing the same
  • Hybrid fiber reinforced resin composite material/concrete combination structure and method for manufacturing the same
  • Hybrid fiber reinforced resin composite material/concrete combination structure and method for manufacturing the same

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Embodiment Construction

[0025] (1) Basic principles of design

[0026] The stress-strain relationship of FRP material conforms to the linear elastic relationship, and the calculation of FRP layer adopts the composite material laminate theory, ignoring the influence of coupling stiffness and bending stiffness.

[0027] In the flexural design of FRP / concrete composite beams, in addition to the basic assumptions for the calculation of the flexural capacity of RC normal sections, the assumptions of plane sections and no interface slip are also adopted for FRP shells.

[0028] The bearing capacity can be calculated iteratively using the fiber method. The constitutive relations of the materials used are shown in Fig. 2 and Fig. 3. According to the experimental and analysis results, due to the restraining effect of the outer FRP on the concrete, the ultimate failure strain of the concrete needs to be corrected, and the descending section of the σ-ε curve should be extended to increase the ultimate failure ...

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Abstract

The FRP-concrete composite structure with rectangular cross section comprises a confounding FRP outside coated layer, a poured-in-place concrete core (21), and the steel bar with minimal reinforcement ratio. For the manufacture, the wet resin method comprises: with stretch-extrusion molding technique; preparing the outside coated layer as a template according to the fiber selection rules and mixing ratio, then designing the position ad height; painting one layer of field wet resin on its inner surface; binding or welding the steel bar in the outside coated layer to form steel frame; finally, pouring the concrete with set ratio.

Description

technical field [0001] The invention relates to the application of fiber-reinforced resin composite material (FRP) / concrete composite structure technology in civil engineering, and belongs to the technical field of concrete composite beam structure design. Background technique [0002] Fiber-reinforced resin composites (FRP) have been widely used in civil engineering as a substitute for steel bars in the seismic reinforcement of existing structures, reinforcement, and construction of new bridges, and have achieved good social and economic benefits. benefit. For the development of new bridges with better durability and higher efficiency, FRP / concrete composite structures represent the future of new structures. [0003] In the FRP / concrete composite structure, high-performance FRP and concrete are closely integrated and bear the load together. It combines the advantages of FRP's high specific strength, large specific modulus, corrosion resistance, good seismic performance, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B32/02B32B13/12B32B37/12
Inventor 吴智深吕志涛李文晓邵一心朱海堂吴刚
Owner 江苏绿材谷新材料科技发展有限公司
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