Pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column

A technology of expansive concrete and composite columns, applied in the directions of columns, piers, pillars, etc., can solve the problems of restricting the use of FRP sleeves due to constraints, and achieve the effects of saving the amount of stirrups, protecting the ecological environment, and improving performance.

Pending Publication Date: 2017-12-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of the FRP sleeve on the concrete is a passive restraint. The restraint effect of the FRP sleeve can only be exerted after the concrete is compressed and expands or even produces micro-cracks. cartridge use

Method used

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  • Pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column
  • Pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] Such as figure 1 As shown, a prestressed FRP sleeve FRP bar sea sand seawater expansive concrete composite column includes an external FRP sleeve 1 and an internal sea sand seawater expansive concrete 2, and the FRP sleeve 1 combines sea sand and seawater expansive concrete 2 Wrapping, the expansion of concrete and the constraints of FRP generate prestress in the FRP sleeve and concrete, and the cross-section of the prestressed FRP sleeve FRP reinforcement sea sand seawater expansion concrete composite column is selected from one of circular, rectangular or square The FRP sleeve 1 is selected from a CFRP sleeve, a GFRP sleeve, a BFRP sleeve or an AFRP sleeve.

[0020] Such as figure 1 with figure 2 As shown, evenly distributed FRP longitudinal bars 3 are placed around the sea-sand and sea-water expansive concrete 2, and run through the sea-sand and sea-water expa...

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PUM

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Abstract

The present invention relates to the field of building, bridge and harbor engineering, and provides a pre-stress FRP bush-FRP rib sea sand seawater expansion concrete combination column, which comprises an external FRP bush and internal FRP rib sea sand seawater expansion concrete, wherein the FRP bush wraps the sea sand seawater expansion concrete, self-stress is generated in the FRP bush and the concrete through the expansion of the concrete and the restriction of the FRP, uniformly distributed FRP longitudinal ribs are arranged on the periphery close to the sea sand seawater expansion concrete combination column, and penetrate through the sea sand seawater expansion concrete from top to bottom, and FRP spiral stirrups are bound around the FRP longitudinal ribs from the outer side along a top-to-bottom direction of the combination column according to the same interval and the same spiral angle. According to the present invention, the pre-tensile stress is generated in the FRP bush through the micro-expansion of the expanded concrete so as to effectively improve the axial limit bearing force of the combination column; and the river sand is replaced by the sea sand, the fresh water is replaced by the seawater, and the steel bar is replaced by the FRP rib, such that the performance of the combination column is improved, the limitation of the application of the sea sand seawater in the practical engineering is broken through, and the positive effect is provided in the protection of the ecological environment.

Description

technical field [0001] The invention relates to a prestressed FRP sleeve FRP rib sea sand seawater expansive concrete composite column, which belongs to the field of construction, bridge and port engineering. Background technique [0002] In recent years, the speed of urbanization across the country has accelerated, and the excessive exploitation of river sand has caused serious damage to the ecological environment of rivers, soil, groundwater, etc. Therefore, using sea sand instead of river sand as construction sand to produce concrete has become a topic of concern. The emergence of sea sand seawater concrete is an opportunity to make full use of marine resources, and its application can promote economic development in coastal areas. Because sea sand seawater contains chloride ions that can severely corrode steel bars, it may cause a decrease in the overall bearing capacity of the structure and even lead to building collapse engineering accidents. These reasons restrict the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/36E01D19/02E01D101/24
CPCE01D19/02E04C3/36E01D2101/28
Inventor 关坤华谢燕邓军张法基
Owner GUANGDONG UNIV OF TECH
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