Steel/high molecular material interlayer tubular joint

Abstract

The invention discloses a steel / high molecular material interlayer tubular joint for jackets, truss column and other types of ocean platforms. One end of a second metal outer tube is connected with the side wall of a first metal outer tube; the inner cavities of the first and second metal outer tubes are respectively coaxially sheathed on a first inner tube and a second inner tube at intervals; the outer walls of the first and second inner tubes are respectively fixed with a first locating ring and a second locating rings which are clamped in the corresponding grooves in the inner walls of the first and second metal outer tubes; the openings at both ends of the first metal outer tube are respectively connected with a first cover plate in a sealing mode; the non-connecting port of the second metal outer tube is connected with a second cover plate in a sealing mode; an integral casting cavity is respectively formed between the first metal outer tube and first inner tube, between the second metal outer tube and second inner tube, and between the first and second cover plates; a core is cast in the cavity; and the core is made of polyurethane and formed by curing after mixing and reacting polyhydric alcohol and isocyanate in the volume ratio of 1:1. The invention can effectively reduce the stress peak in the tubular joint region, enhance the fatigue strength and have favorable material stability and durability.

Description

technical field [0001] The invention relates to a pipe joint, which is used in ocean engineering and civil engineering structures, and is especially suitable for ocean platforms such as jackets, truss columns, and the like. Background technique [0002] At present, in the large-span and space structures of offshore platform structures or civil engineering, they are composed of pipe members and joints connected with pipe members. Among them, the pipe joint is the key part of the offshore platform structure or space structure, and it is also the weakest part, which is often affected by various loads. Especially in the marine environment, the stress at the connection between the pipe joint and the component is highly concentrated, and under the action of various dynamic loads such as wind, sea waves and earthquakes, fatigue, punching shear and other forms of damage are prone to occur, thereby reducing the bearing capacity of the structure capacity and stiffness, reducing servi...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of poor ductility, poor impact resistance and low fatigue strength of steel pipe joints and steel / concrete composite hollow pipe joints in current offshore platform structures, the present invention provides a steel / polymer material sandwich pipe joint with good performance Ductility, anti-fatigue and impact resistance, can improve the bearing capacity, energy dissipation capacity and stability of the structure

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