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

Abstract

The invention relates to a concrete member, particularly to a cross shaped section composite column used for civil engineering. The steel skeleton-steel pipe fiber concrete cross shaped section composite column is composed of steel skeletons, a steel pipe, steel bars and fiber concrete. The steel skeletons are on the limbs of the cross shaped column, and are in favor of improving the stress performance of the limbs of the T-shaped column; the steel pipe is located at the intersecting core part of the column limbs, thus effectively limiting the brittle deformation of high-strength concrete and promoting application of high-strength concrete in the cross shaped column; the fiber concrete is arranged inside and outside the steel pipe, and the characteristics of the fiber material are fully utilized to improve the low brittleness, tensile strength, shearing resistance, bending strength and other disadvantages of high-strength concrete; the steel bar skeletons have a restriction effect on the fiber concrete and strengthen the bearing capacity of the column. The steel skeleton-steel pipe fiber concrete cross shaped section composite column provided by the invention is a main member 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 member, in particular to a fiber concrete cross-shaped column used in civil engineering, which is a novel cross-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 cross-shaped column appeared. The advantages of the reinforced concrete cross-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 s...

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 purely reinforced concrete cross-shaped columns have become more and more prominent

If limited by the axial compression ratio, if ordinary reinforced concrete cross-shaped columns are still used under heavy loads, the cross-sectional dimensions of the columns will be very large; 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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