Connected node of concrete filled steel tube combination column and reinforced concrete beams

Abstract

The invention discloses a connected node of a concrete filled steel tube combination column and reinforced concrete beams. The concrete filled steel tube combination column and the reinforced concrete beams are intersected to the connected node. Open holes are formed in steel tubes, corresponding to the intersected positions of the reinforced concrete beams, of the concrete filled steel tube combination column. The upper end and the lower end of each reinforced concrete beam and the upper end and the lower end of the concrete filled steel tube combination column are respectively provided with two open holes, namely two upper end open holes and two lower end open holes. Longitudinal ribs inside reinforced concrete beams penetrate through the open holes in the tube wall and are anchored on core concrete inside the steel tubes. The positions above the upper end open holes, the positions below the upper end open holes, the positions above the lower end open holes and the positions below the lower end open holes are respectively provided with an annular reinforcing plate. Vertical reinforcing plates are arranged on the portions, between the open holes which have the same height and small gaps, of the tube wall. The concreted node of the concrete filled steel tube combination column and the reinforced concrete beams is used under the condition that multiple beams are slantly intersected to the node in a small-angle mode, and holes are closely formed in the tube wall. When the heights of the cross sections of the multiple beams are different, the beam longitudinal ribs can also penetrate through the large open holes conveniently. According to the connected node of the concrete filled steel tube combination column and the reinforced concrete beams, stress concentration between the open holes of the tube wall can be conveniently controlled, meanwhile, the hoop effect of the tube wall with the open holes is reinforced, and the anti-seismic performance of the node can be ensured.

Description

technical field [0001] The invention is a connection node of a steel pipe concrete composite column and a reinforced concrete beam used in the design and construction of a building structure engineering, and belongs to the innovative technology of the through-type connection node of a steel pipe concrete composite column and a reinforced concrete beam. Background technique [0002] Concrete-filled steel tube composite columns have the advantages of high strength and good ductility, and have been more and more used in the design of high-rise buildings. In order to ensure the seismic performance and take into account the economic requirements, high-rise buildings often prefer to use reinforced concrete beams. However, due to the existence of steel pipes, the longitudinal bars in reinforced concrete beams are difficult to be anchored in the joints of composite columns. The design of the joints between steel pipe concrete composite columns and reinforced concrete beams has becom...

AI Technical Summary

Problems solved by technology

Although the use of reinforced concrete ring beam joints avoids the trouble of beam longitudinal bars passing through steel pipes, it also has the following disadvantages: on the one hand, the protruding joint part of the ring beam will affect the shape of the building's facade; There are conflicts with the steel bars in the column and beam sections during construction, and it is difficult to meet the anchorage length requirements. At the same time, it is difficult to pour concrete and difficult to construct.

For the case where the same node contains small-angle intersecting beams and beams with different cross-sectional heights, the design and construction of the reinforcement ring for such a node with an external reinforcement ring require high precision; and it is only applicable to the concrete inside the steel pipe and the concrete outside the steel pipe Projects of composite columns constructed in different periods

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