Fiber reinforce plastic (FRP) reinforced concrete-filled steel tube combination column

Abstract

The invention aims at providing a fiber reinforce plastic (FRP) reinforced concrete-filled steel tube combination column which comprises a steel tube, a hoop rib, an FRP reinforced rib and a longitudinal reinforcement, wherein the hoop rib and the FRP reinforced rib are arranged in the steel tube; the inner wall of the steel tube is provided with fixed angle iron; the end part of the FRP reinforced rib is fixed on the angle iron; the FRP reinforced rib is provided with a hole, and the hoop rib passes through the hole in the FRP reinforced rib; the longitudinal reinforcement is fixed on the hoop rib; the steel tube is filled with concrete. An FRP reinforced rib plate internally provided with the hoop rib and the longitudinal reinforcement is arranged in the FRP reinforced concrete-filled steel tube combination column, and the concrete can be separated again, so that the restraint effect of the concrete is improved, the bearing capacity of the concrete is improved, and the tube wall on the stressed side is effectively prevented from being bended. By adopting a structure of enabling reinforced concrete, the FRP reinforced rib and the steel tube to cooperative work, the FRP reinforced concrete-filled steel tube combination column is simple in structure and convenient to construct, and has the characteristics of being light in weight, high in carrying capacity and good in ductility and shock resistance.

Description

technical field [0001] The present invention relates to a load-bearing structure, specifically a concrete column. Background technique [0002] Concrete filled steel pipe columns are structural members made of concrete filled steel pipes. Because the steel pipe has a good hoop restraint effect on the concrete, the core concrete bears longitudinal pressure and is also subject to the lateral restraint of the steel pipe, and is in a stress state of three-dimensional compression, so that the core concrete has higher axial compressive strength and Compression deformation ability, plasticity and toughness properties are greatly improved. At the same time, the steel pipe can enhance the stability of the steel pipe wall by means of the supporting effect of the concrete filled inside. The CFST structure has the advantages of high bearing capacity, good ductility, and fast construction speed. [0003] With the emergence of high-rise, super-high-rise structures and long-span arch br...

AI Technical Summary

Problems solved by technology

For large-diameter steel pipe concrete, the bonding problem between steel pipe and concrete will be more prominent. When the diameter of the steel pipe is large, the steel pipe’s ability to restrain the core concrete will be weakened, and the core concrete and steel pipe will separate at the interface or the core concrete will not be dense. Hollow phenomenon, the steel pipe wall is easy to buckle prematurely, the concrete strength cannot be fully exerted, and the bearing capacity, stiffness and stability of the component are reduced, which seriously restricts its service performance and service life

Images