CN203238783U - Rectangular concrete filled steel tubular column and steel beam semi-rigid node structure - Google Patents

Abstract

The utility model discloses a semi-rigid joint structure between a rectangular steel pipe concrete column and a steel beam, which is provided with two upper and lower T-shaped steel connectors at the position where the rectangular steel pipe concrete column is connected to the I-shaped steel beam. The steel connectors are fixed on the rectangular concrete-filled steel pipe columns through high-strength bolts, and the ends of the I-shaped steel beams are placed between the two T-shaped steel connectors. The flange is fixed together with the upper and lower T-shaped steel connectors. The utility model has the advantages of simple structure, convenient installation and steel saving. By controlling the size of the connectors and the number of high-strength bolts to control the bending moment bearing capacity of the joints, the joints have better plastic rotation capacity and can be more stable under the action of earthquakes. Good energy dissipation, to achieve the design concept of ductile joints.

Description

Rectangular steel tube concrete column and steel beam semi-rigid joint structure

technical field

The utility model belongs to the field of construction engineering and relates to a combined structure of steel and concrete.

Background technique

With the development of building structures, the research and application of steel-concrete composite structures has been rapidly developed, and has become a recognized new structural system, which is juxtaposed with steel structures, wood structures, masonry structures and reinforced concrete structures, and Expanded to become the fifth largest structure. In recent years, due to the unique advantages of simple joint form, large section moment of inertia, good stability, and easy fire prevention measures, rectangular concrete filled steel tubes have been widely used. However, most of the joints of these rectangular steel tube concrete frame structures are directly welded; some use bolts to penetrate the outstretched end plates or inner partitions, and after the concrete in the tube reaches a certain strength, prestress is applied to the bolt rods; the above connection methods are all rigid. The joint structure and the rigid joint structure have problems such as poor joint ductility and large welding residual stress, and are prone to brittle failure under earthquake action.

Utility model content

The purpose of the utility model is to provide a rectangular steel pipe concrete column and semi-rigid node structure in order to overcome the deficiency of the welding form of the rectangular steel pipe concrete frame.

The technical scheme of the utility model is: a rectangular steel tube concrete column and a semi-rigid node structure, which is characterized in that it is provided with two upper and lower T-shaped steel connections at the position where the rectangular steel tube concrete column is connected to the I-shaped steel beam. The T-shaped steel connectors are fixed on the rectangular steel pipe concrete columns through high-strength bolts through the reinforcement, and the ends of the I-shaped steel beams are placed between the two T-shaped steel connectors, and the I-shaped steel beams are connected by high-strength friction bolts. The upper and lower flanges of the beam are fixed together with the upper and lower T-shaped steel connectors.

Compared with the prior art, the utility model has the following advantages:

1. Due to the use of high-strength bolts with ribs, its function is equivalent to that of the inner partition, which can effectively transmit the tension and pressure of the upper and lower flanges of the steel beam; it not only has the function of the inner partition, but also has The advantages of direct force transmission, saving steel, and ensuring building space are more conducive to the pouring and compacting of concrete in the pipe.

2. The upper and lower flanges of the I-shaped steel beam are connected to the wall of the rectangular steel pipe through T-shaped steel connectors. Frictional bolts are connected with T-shaped steel, which has a simple structure and convenient construction. By controlling the model size of the T-shaped steel connecting piece and the number of high-strength bolts, the rigidity of the joint is controlled.

3. The structure of the node is simple, easy to install, and steel is saved. The bending moment bearing capacity of the node is controlled by controlling the size of the connecting piece and the number of high-strength bolts, so that the node has better plastic rotation capacity. Under the action of an earthquake, it can Better dissipate energy and realize the design concept of ductile nodes.

Description of drawings

Fig. 1 is the front view of the utility model, shows in the figure that rectangular steel pipe concrete column two sides are provided with I-shaped steel beam;

Fig. 2 is a top view of the utility model, which shows that the four sides of the rectangular steel tube concrete column are provided with I-shaped steel beams.

In the figure: 1-rectangular steel pipe concrete column; 2-I-shaped steel beam; 3-T-shaped steel connector; 4-high-strength bolt with reinforcement; 5-high-strength friction bolt.

Detailed ways

The utility model is further described below with reference to accompanying drawing:

As shown in Figures 1 and 2, a rectangular concrete-filled steel tube column and semi-rigid joint structure is provided with two upper and lower T-shaped steel connectors at the position where the rectangular steel tube concrete column 1 is connected to the I-shaped steel beam 2 3. The T-shaped steel connector 3 is fixed on the rectangular steel pipe concrete column 1 through the high-strength bolt 4 of the steel bar, and the end of the I-shaped steel beam 2 is placed between the two T-shaped steel connectors 3, and the high-strength friction bolt 5. Fix the upper and lower flanges of the I-shaped steel beam 2 and the upper and lower T-shaped steel connectors 3 together.

Figure 1 shows that the two sides of the rectangular steel tube concrete column are symmetrically provided with I-shaped steel beams;

Figure 2 shows that the four sides of the rectangular steel tube concrete column are provided with I-shaped steel beams; the symmetrical T-shaped steel connectors 3 on both sides are fixed together with high-strength bolts 4 that penetrate the reinforcement.

Claims (1)

1. a rectangular steel-tube concrete column and girder steel structures with semi-rigid joints structure, it is characterized in that, it is on the position of the connection i-shape steel beam of rectangular steel-tube concrete column, be provided with upper and lower two T-steel connectors, the T-steel connector is fixed on the rectangular steel-tube concrete column by the through ribbed high-strength bolt, the termination of i-shape steel beam is placed between two T-steel connectors, by high strength friction-type bolt the upper bottom flange of i-shape steel beam and two T-steel connectors up and down is fixed together.

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