Seawater and sea sand concrete column

Abstract

A seawater and sea sand concrete column comprises a polyethylene pipe and a plurality of FRP-steel composite reinforcements. The plurality of FRP-steel composite reinforcements are vertically arrangedin the polyethylene pipe, the plurality of FRP-steel composite reinforcements are arranged in the polyethylene pipe are evenly arranged in the circumferential direction in an equal-radian mode, FRP-steel composite stirrups are arranged outside the plurality of FRP-steel composite reinforcements, the polyethylene pipe is filled with concrete, and the concrete is composed of sea sand, seawater, cement and coarse aggregate. According to the invention, by adopting the polyethylene pipe on the outside and the FRP-steel composite reinforcements on the inside to constrain the concrete composed of the sea sand and seawater, the bearing capacity of the concrete column is improved, ductility and anti-seismic capacity are improved, corrosion resistance is prominent, and therefore the section size ofthe column is reduced, the use area of a building is increased, and the bending resistance is good.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a seawater sea sand concrete column. Background technique [0002] Concrete structure, steel structure and steel-concrete composite structure, these structures have their own advantages and have been widely used in civil engineering, but some problems have also been exposed in engineering practice, the most prominent problem is due to the reinforcement or Corrosion of steel causes premature structural degradation or insufficient structural function. In the United States, it has been confirmed that more than 40% of bridges have insufficient structural durability or functional degradation. This requires the development of economical and effective structural reinforcement methods and new high-performance structural materials as soon as possible to extend the service life of structures and improve structural performance. [0003] The construction of island defense and military infr...

AI Technical Summary

Problems solved by technology

At present, the sand and water used in concrete are mainly freshwater river fresh sand. For the construction of some remote islands, if traditional concrete is used, a large amount of river sand and fresh water need to be transported from the inland. On the one hand, it will affect the construction period, and at the same time Increase the construction cost. Therefore, if we can find a way to configure concrete with seawater and undisturbed sea sand, it will not only alleviate the shortage of fresh water and fresh sand resources, but also reduce the cost of concrete mixing to a certain extent. It is of extraordinary significance to meet the development of marine economy and the construction of island defense

[0004] FRP bars (Fiber Reinforced Plastics Bars fiber composite materials) have the advantages of corrosion resistance, high tensile strength, low density, light weight, good electromagnetic insulation, and good vibration damping performance, but there are also disadvantages such as material brittleness and high price.

The elastic modulus of existing FRP bars (except high-strength CFRP bars) is lower than that of steel bars, and its stress-strain relationship is a straight line without a yield platform. When it is used alone in a concrete structure, it will cause FRP The brittle failure characteristics of reinforced concrete members and the excessive crack width and deflection in service state limit its popularization and application in the field of civil engineering

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