FRP section-steel composite pipe concrete combination column

A composite pipe and concrete technology, applied in the direction of columns, pier columns, pillars, etc., can solve the problems of limited stiffness improvement effect, achieve excellent mechanical properties of columns, excellent designability, and improve production efficiency and product quality.

Inactive Publication Date: 2018-07-03
SHENYANG JIANZHU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing studies on FRP sheets reinforced steel pipe concrete show that the strengthening effect of FRP sheets on the column is mainly reflected in the improvement of the bearing capacity of the column, but the effect on the stiffness is limited.

Method used

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  • FRP section-steel composite pipe concrete combination column
  • FRP section-steel composite pipe concrete combination column

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Embodiment Construction

[0013] Refer to attached Figure 1-2 The FRP profile-steel composite tube-concrete composite column is further described in detail.

[0014] A FRP profile-steel composite pipe-concrete composite column, comprising FRP profile-steel composite pipe 1, FRP bars 3, and concrete 2;

[0015] The FRP profile-steel composite pipe 1 is composed of an FRP winding layer 1-3, a steel pipe 1-2, and an FRP pultrusion profile 1-1; wherein, the steel pipe 1-2 is provided with an FRP winding layer 1-3, and the steel pipe 1-2 2 FRP pultruded profiles 1-1 are arranged inside; the cross-sectional forms of the FRP profile-steel composite pipe 1 can be various, such as circular, square, rectangular, etc.

[0016] A plurality of shear bolts 1-4 run through the side walls of the FRP winding layer 1-3, the steel pipe 1-2, and the FRP pultrusion profile 1-1;

[0017] Concrete 2 is provided inside the FRP profile-steel composite pipe 1; FRP bars 3 are provided through the concrete 2 .

[0018] The FR...

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Abstract

The invention relates to an FRP section-steel composite pipe concrete combination column. The combination column sequentially comprises an FRP wound pipe, a steel pipe and an FRP pultruded section from outside to inside. The pultruded section can be made into a ribbed section, and a section form can be designed to be a sealed tube and also can be designed into a form that multiple independent pultruded sections are annularly arranged along the inner wall of the steel pipe. Plain concrete or reinforced concrete fills up the interior to form the combination column. In an FRP section-steel composite pipe, the outer-layer wound FRP pipe can provide hoop constraint for the steel pipe, the FRP pultruded section and internal concrete, and the steel pipe can be protected from being corroded. The pultruded section can provide axle load and bending resistance for a column body, and the characteristics, namely low modulus and high ultimate elongation, of the FRP section are utilized for providingpost-yield stiffness under the condition of large horizontal deformation of the column body. The combination column provided by the invention is better in mechanical properties and applicable to engineering structures used in coastal and other high corrosion environments.

Description

technical field [0001] The invention relates to an FRP profile-steel composite pipe-concrete composite column, which can be used in construction engineering and bridge engineering. Background technique [0002] FRP-reinforced CFST column is a composite structural column formed by arranging FRP sheets outside CFST or thin-walled CFST. FRP can be hoop-bound or longitudinally reinforced (thin-walled) CFST columns. Utilizing the high-strength characteristics of FRP can improve the mechanical properties of the column, reduce the amount of steel used, and use the excellent chemical stability of FRP to enhance the durability of the column. The composite structural column can be used to strengthen the damaged steel pipe concrete column, and can also be used in new structures. [0003] Existing studies on FRP sheets reinforced concrete filled steel tubes show that the strengthening effect of FRP sheets on the column is mainly reflected in the improvement of the bearing capacity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34
CPCE04C3/34
Inventor 朱春阳孙天娇孙丽魏明海刘海成梁倩倩
Owner SHENYANG JIANZHU UNIVERSITY
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