Connection structure of connection of floor beam and steel pipe concrece pole and construction method thereof

Abstract

The invention discloses a joint structure at the connection part of steel pipe concrete pile and floor beam and the constructing method. The joint structure includes steel pipe concrete pile, floor beam and ring type concrete beam. The vertical component steel pile and the parallel component floor beam are connected at the joint, the steel pipe is drilled with a aperture at position correspondent to the joint on the floor, thus the beam lengthwise rib of the beam can pass through the steel pile directly; ring type concrete beams are arranged around the steel pipe in the joint area, the steel bar in the ring concrete beam includes ring type beam lengthwise rib which is concentric with the steel pipe concrete pile and radiate ring beam hooping in radius direction; a steel bar cage concentric with the steel pipe is arranged in the pile, which includes vertical pile connection lengthwise rib and parallel pile connection hooping, the anchor in the steel bar cage extension length is decided by the diameter of the steel bar.

Description

technical field [0001] The invention relates to a building structure, in particular to a node structure at the junction of a steel pipe concrete column and a floor beam and a construction method thereof. Background technique [0002] As a composite structure with the advantages of steel structure and concrete structure, CFST column is more and more widely used in engineering. However, as one of the key parts of the structure, the problems of force and structure have not yet been solved. It has been well resolved and has become a "bottleneck" problem restricting the application of CFST columns. [0003] The existing connection structures of steel tube concrete columns and floor beams in the joint area can be divided into two types: column steel tube continuous form and floor beam continuous form. [0004] 1. Nodes in the continuous form of column steel pipes: [0005] The main idea is: keep the steel pipe concrete column connected along the full he...

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Problems solved by technology

[0008] 1) The mechanical properties of joints and the simplicity and economy of construction cannot be both: some joint types, such as reinforced ring type joints, have good mechanical properties and high overall stiffness of joints, but the amount of materials is large and the construction is complicated; some joint types, For example, the anchor plate joint has simple structure, convenient construction, and saves materials, but its mechanical properties are not ideal; another example is the shear ring beam joint, which has outstanding construction and economic advantages, but its joint stiffness is limited. , poor performance under complex stress conditions;

[0009] 2) Affect the appearance and use of the building: the structure of the joints of the cast-in-place floor beams and slabs often conflicts with the appearance and use functions of the building, and makes the layout of the floor beams and slabs inflexible, such as the complicated layout of the beam system of the double-beam joints, and the The single beam joint makes the width of the floor beam too large, which not only increases the weight of the structure but also causes waste of materials, and affects the beauty of the floor;

[0010] 3) The application of joints is not flexible: the joints used in the current engineering are only applicable to conventional situations. For special floor layouts, such as non-orthogonal beam systems, the elevation and height of each beam are different, and its application subject to certain restrictions

[0014] 1) The disconnection of the column steel pipes in the joint area greatly weakens the transmission capacity of the axial load. Although the axial bearing capacity problem can be solved by setting the ring beam equipped with circumferential reinforcement, the axial deformation is too large, which has a great impact on the structure. The overall force is greatly affected;

[0015] 2) The bending moment transmission and shear force transmission capacity of the column steel pipe at the connection surface of the beam surface and the beam bottom is poor, and the corresponding structural treatment increases the amount of materials and the complexity of the structure;

[0016] 3) It is difficult to center the upper and lower columns during construction;

[0017] 4) Steel pipes need to be hoisted and fixed on each floor, which is not easy to construct when applied in super high-rise buildings

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