Steel skeleton-steel pipe fiber concrete L-shaped section composite column

Abstract

The invention relates to a steel skeleton-steel pipe fiber concrete L-shaped section composite column, which is composed of steel skeletons, a steel pipe, a framework of steel reinforcement and fiber concrete. The steel skeletons are formed by welding of steel plates. The steel pipe is filled with concrete, a stirrup is in an L shape, and is internally wrapped with concrete. The steel skeletons are located on the limbs of the L-shaped column, the steel pipe is located in the core of the L-shaped column, and the concrete adopts fiber concrete. The limbs of the L-shaped column refer to the centers of rectangular parts, and the steel skeletons are arranged in a T shape. The core of the L-shaped column refers to the center of an L-shaped column corner. The fiber concrete is inside and outside the steel pipe, and the characteristics of the fiber material are fully utilized. The steel skeleton-steel pipe fiber concrete L-shaped section composite column provided by the invention is a main component of the frame structure in high-rise and large span buildings, and has the characteristics of high bearing capacity, high stiffness, light weight, good plasticity and toughness, good impact and fatigue resistance, excellent seismic performance, and good durability, etc.

Description

technical field [0001] The invention relates to a concrete component, in particular to a fiber concrete L-shaped column used in civil engineering, which is a novel L-shaped section composite column. Background technique [0002] In the current society, with the development of the economy and the improvement of residents' living standards, people have higher and higher requirements for housing, especially for housing structure and living room layout. Because the cross-sectional size of ordinary concrete columns is often larger than the thickness of the wall, it affects the use of indoor space, and it is difficult to meet the requirements of architectural beauty. In order to solve this problem, the structural form of reinforced concrete L-shaped column appeared. The advantages of the reinforced concrete L-shaped column structure system are more prominent, and scholars and experts at home and abroad have conducted extensive and in-depth research on it. The theoretical system ...

AI Technical Summary

Problems solved by technology

[0003] However, with the continuous development of super high-rise and long-span building structures, the disadvantages of pure reinforced concrete L-shaped columns are becoming more and more prominent

If limited by the axial compression ratio, if ordinary reinforced concrete L-shaped columns are still used under heavy loads, the section size of the columns will be very large; due to the existence of multiple legs, the shear center and section centroid of L-shaped columns often In the state of stress, each limb produces warping normal stress and shear stress; due to the shear stress, the concrete of the column limbs cracks before the ordinary rectangular column, that is, abdominal shear cracks occur, resulting in obvious brittleness of the special-shaped column, making the special-shaped column The deformation capacity of the column is lower than that of ordinary rectangular columns, and the seismic performance is not ideal

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