Double-steel pipe composite member filled with foamed aluminum

Abstract

The invention discloses a double-steel pipe composite member filled with foamed aluminum. The composite member is of a cylindrical structure and comprises, from exterior layer to interior layer, an outer steel pipe (1), foamed aluminum (2) and an inner steel pipe (3), wherein the place between the outer steel pipe (1) and the inner steel pipe (3) is filled with the foamed aluminum (2), the center of the inner steel pipe (3) is filled with nothing, the wall thickness of the outer steel pipe (1) is no less than the wall thickness of the inner steel pipe (3), and the foamed aluminum (2) is of an open-pore or closed-pore structure which can be filled with a high-performance viscoelastic material. The outer and inner steel pipes provide peripheral constraint to the foamed aluminum and improve the strength of the foamed aluminum, and addition of the foamed aluminum compensates for the defects of low damping and poor energy-absorbing performance of a steel pipe member; the outer and inner steel pipes mainly bear axial acting force; and foamed aluminum between the outer and inner steel pipes is mainly used for absorbing energy and protect the structure during an earthquake, a strong breeze and violent vibration. The double-steel pipe composite member filled with the foamed aluminum is applicable to buildings and structures in a high-intensity zone, a high-performance structure and a high-rise building (such as a building of a thousand-meters scale).

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a composite member filled with foamed aluminum and double steel pipes. Background technique [0002] Aluminum foam is a new type of functional material developed in recent years. It has the characteristics of light weight, high specific stiffness, macroporosity, uneven structure, and the compressive stress-strain curve contains a long plateau. The porous effect of the material itself makes the foam Aluminum has much higher damping properties than its base material. With the deepening of related research, aluminum foam is gradually regarded as a lightweight and high-damping material characterized by high energy absorption and has important application potential in vibration reduction. [0003] On the other hand, the steel pipe structure has been favored by the engineering community due to its excellent performance, but the defects of low damping, easy buckling and poo...

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In view of the defects of low damping, easy buckling and poor energy absorption performance of the steel pipe structure and the problem that the vibration damping performance of the existing steel pipe concrete needs to be improved, the invention provides a foam that improves the energy consumption and vibration damping performance of the steel pipe by filling foam aluminum Aluminum-filled double-steel tube composite member, which has greater specific stiffness and better energy dissipation and vibration damping performance than existing members

Images