FRP hoop joint of thin-walled circular steel tube regenerated block concrete structure

Abstract

The invention discloses an FRP hoop joint of a thin-walled circular steel tube regenerated block concrete structure. The FRP hoop joint comprises a thin-walled circular steel tube regenerated block concrete column, a steel beam, two reinforcing ring plates and at least two FRP hoops, the thin-walled circular steel tube regenerated block concrete column comprises a column steel tube, the thin-walled circular steel tube regenerated block concrete column and the steel beam intersect to form a joint domain, a groove-shaped opening is formed in a web of the steel beam, each FRP hoop penetrates through the groove-shaped opening and is pasted to the column steel tube, the two reinforcing ring plates are flush with and welded to an upper flange and a lower flange of the steel beam, and the two reinforcing ring plates are welded to the column steel tube. Each FRP hoop comprises at least one layer of FRP cloth, the width of each FRP hoop is not larger than 1/4 of the height of the web, the totalwidth of all the FRP hoops is not larger than 1/2 of the height of the web, and all the FRP hoops and the two reinforcing annular plates jointly form discontinuous constraint on the joint domain. Byapplying the FRP hoops, the stress performance of the joint domain can be remarkably improved, and the phenomenon that the thin-wall steel tube in the joint domain is bent and loses efficacy too earlyis avoided.

Description

technical field [0001] The invention relates to the technical field of waste concrete recycling, in particular to an FRP hoop node of a thin-walled circular steel tube recycled block concrete structure. Background technique [0002] The recycling of waste concrete meets the sustainable development requirements of contemporary buildings. On the one hand, it reduces the discharge of solid waste and protects the natural environment. On the other hand, it can alleviate the problem of the depletion of natural sand and gravel. In this context, steel pipe recycled block concrete columns came into being. The new structural column is formed by alternately injecting large-scale waste concrete blocks and new concrete into the steel tube, and has excellent mechanical properties comparable to ordinary steel tube concrete columns. In order to promote the popularization and application of this type of component, it is necessary to reduce its cost to make it close to the construction cost ...

AI Technical Summary

Problems solved by technology

For thin-walled circular steel pipe recycled block concrete columns, the use of through-hole components will not be conducive to the placement of waste concrete, and the use of ring beam joints will affect its appearance

In addition, due to the small wall thickness of thin-walled steel pipes, if reinforced ring joints are used, the steel pipes in the joint domain will buckle earlier or even partially tear when stressed, seriously affecting structural performance and safety.

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