Multi-bundle-shaped ultra-high-performance concrete constraint common concrete T-shaped column and T-shaped short-leg shear wall

Abstract

The invention discloses a multi-bundle-shaped ultra-high-performance concrete constraint common concrete T-shaped column which comprises a T-shaped concrete special-shaped column. A column body framework of the T-shaped concrete special-shaped column comprises an outer wrapping plate wrapping the special-shaped column and inner separation plates for separating space in the section of the special-shaped column and is cast-molded through ultra-high-performance concrete. The section of the special-shaped column is divided into a plurality of independent unit bodies through the outer wrapping plate and the inner separation plates, and a plurality of bundle-shaped independent split columns are formed. Corresponding orthogonal inner separation plates are arranged on the intersection area of two column legs of the T-shaped concrete special-shaped column. Similarly, the invention further discloses a T-shaped short-leg shear wall. The self-constraint function of the concrete is fully utilized, the outer wrapping constraint function of steel on the concrete is replaced, the steel is saved, and the manufacturing cost is reduced. Based on the good compactness, casting performance and high strength of UHPC, the bearing capacity and durability performance of the special-shaped column or the short-leg shear wall structure can be remarkably improved through the multi-bundle shape, and the advantages of being simple in structure, novel in material, excellent in performance and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a multi-beam ultra-high-performance concrete restrained ordinary concrete T-shaped column and a T-shaped short-limb shear wall. Background technique [0002] Modern civilization has given birth to a change in people's aesthetic concept of things. As a vertical load-bearing member in the frame structure—column, its traditional form is a rectangular cross section. The special-shaped column structure has the characteristics of the same thickness as the infill wall, so it avoids the column flute protruding from the wall, increases the actual usable area of ​​the room, and improves the "household rate", which is favored by owners and users. With the continuous development of commercial buildings such as residences and offices towards high-rise and super-high-rise buildings, the width of the column limbs of the special-shaped column structure is bound to in...

AI Technical Summary

Problems solved by technology

Although high-strength concrete special-shaped columns or short-limb shear walls can improve the bearing capacity of columns or walls, the brittleness of high-strength concrete is very unfavorable to the seismic performance of structural columns or walls

Of course, the built-in section steel can make up for the deficiency of high-strength concrete in this respect, but another significant problem also follows, that is, arranging more section steel in the slender special-shaped column or short-shear wall It is very difficult to arrange the reinforcement in the beam-column joint area or the beam-wall joint area, which leads to a narrower space in the joint area, which is very unfavorable to the decrease of coarse aggregate during concrete pouring, and may easily cause voids, honeycombs, etc. in the joint core area Phenomenon

Obviously, the use of confined concrete technology can better avoid the occurrence of the above phenomenon. The CFST special-shaped column or short-leg shear wall inherits the advantages of the CFST structure, but it is not economical in terms of the amount of steel used, and what is even more important is that Concrete-filled steel tube special-shaped columns or short-leg shear walls are prone to 90-degree internal angles, which can lead to weak restraint of steel tubes on concrete and poor composite performance

Although corresponding structural measures (such as setting stiffeners and tie rods) have also been proposed to improve the performance of CFST special-shaped columns or short-leg shear walls, these measures will cause greater damage to steel pipes, and the processing cost is also high. increased badly

In addition, the outsourced steel pipes are also extremely cumbersome in the post-corrosion and fire prevention treatment of concrete-filled steel pipe special-shaped columns. If not handled properly, it will be very detrimental to the durability and fire performance of special-shaped columns or short-leg shear wall structures

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