Combined column with reactive power concrete (RPC) outer cylinder filled with micro-expansion concrete

Abstract

The invention relates to the field of building, bridge and port projects and discloses a combined column with a reactive power concrete (RPC) outer cylinder filled with micro-expansion concrete. The combined column comprises the peripheral RPC outer cylinder and a micro-expansion concrete column body at the core area. The RPC outer cylinder covers the micro-expansion concrete column body at the core area. Longitudinal steel bars and common stirrups are arranged in the micro-expansion concrete column body. Through the restraint of the peripheral RPC outer cylinder, transverse displacement of the core concrete is limited, the overall rigidity of the combined column is improved, and the fire resistance and durability properties of the combined column are further improved. Through the application of the micro-expansion concrete, the durability property of the combined column is strengthened in the same way, prestress is generated inside the combined column through volume expansion of the combined column, and the axial ultimate bearing capacity of the combined column is improved. According to the combined using mode of RPC and the micro-expansion concrete, the combined column has excellent high-temperature resistance and abrasion resistance properties, and therefore the combined column with the RPC outer cylinder filled with the micro-expansion concrete can be used as a bearing member in the severe environments such as an ocean and the high-temperature and high-humidity environment.

Description

technical field [0001] The invention relates to a micro-expansion concrete composite column filled in an RPC outer cylinder, which belongs to the field of construction, bridge and port engineering. Background technique [0002] In the development of modern engineering structures, people continue to use the concept of "combination" to achieve breakthroughs in structural forms. The three-dimensional compressive strength test of concrete shows that the effect of lateral compressive stress can effectively prevent the lateral deformation of concrete under the action of axial pressure and the development of internal micro-cracks, so that the compressive strength of concrete has a greater improvement. Therefore, if the concrete column is outsourced with a material with good ductility, it can form a three-dimensional constraint on the core concrete, increase the strength and elastic modulus of the concrete, improve the plasticity and toughness of the concrete, and thereby increase ...

AI Technical Summary

Problems solved by technology

Therefore, if RPC is used to replace steel pipes and FRP for outsourcing constraints on ordinary concrete columns, to overcome the shortcomings of steel pipes that are susceptible to corrosion and FRP constraints with extremely poor fire resistance, a composite column member with excellent mechanical properties and durability is proposed, which is positive It is the starting point of the present invention

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