Connecting structure for steel tube concrete beam and column node

Abstract

Steel pipe concrete beam-column joints connecting structure, and it aims at improving the shear and flexural strength of beam-column joints and ensuring the steel plate and node work together. The cross section of steel pipe 4 in steel pipe concrete column is rectangular, the steel beam 31, 32, 33, 34, 35 in beam and the reinforcing bar 11, 12, 13, 14, 15 cross through the rectangular hole h3-1, h3-2, h3-3, h3-4, h3-5 and round hole h1, h2, h3, h4, h5 separately, two ends of the steel plate 31, 32, 33, 34, 35 are opened 8-16 semi-circle holes separately.

Description

Technical field [0001] The invention relates to the connection of general building structures, in particular to the connection of concrete columns and beams. Background technique [0002] Although there are many types of joints in the existing Chinese concrete-filled steel tube structure engineering, the calculation theory of the joints is not perfect, and the test and theoretical research of the joints are seriously lagging behind the application of actual projects. Cai Jian, Huang Taiyun, and Lu Shuhui's "Overview of Research and Application Status of Concrete Filled Steel Tubular Column Joints" mentioned the existing problems in existing connections: (1) The mechanical properties of the joints cannot be compromised with the ease and economy of construction. In practical applications, some joints have high overall rigidity, but the amount of materials is large and the construction is complicated. For example, the reinforced ring joints have reliable mechanical properties. Howev...

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Problems solved by technology

[0002] Although there are many joint forms in the existing Chinese steel pipe concrete structure engineering, the calculation theory of the joints is not perfect enough, and the test and theoretical research of the joints seriously lag behind the application of the actual engineering

Cai Jian, Huang Taiyun, and Lu Shuhui's "Review of the Research and Application of Concrete-filled Steel Tube Column Joints" mentioned the problems existing in the existing connections: (1) The mechanical properties of joints and the simplicity and economy of construction cannot be both

In practical applications, some joints have high overall rigidity, but the amount of materials used is large and the construction is complicated. For example, reinforced ring joints have reliable mechanical properties, but if they are connected to concrete beams, the connection between the ring plate and the beam reinforcement is difficult. Realization, some types of joints are simple in structure, convenient in construction, and save materials, but their mechanical properties are not ideal. The shear ring beam joint has outstanding construction and economic advantages, but its joint stiffness is limited, and the transmission of shear force depends on the shear ring reinforcement and the bonding force and friction between the concrete and the steel pipe wall. Work performance under stress needs to be verified

(2) Affect the appearance and use of buildings

The structure of the joints of the cast-in-place floor beams and slabs often conflicts with the appearance and use of the building, and makes the layout of the floor beams and slabs inflexible. For example, when the ring beams are applied to the side columns, the ring beams will protrude from the building facade ; Another example is the double-beam joint, which on the one hand complicates the layout of the beam system, and on the other hand causes the unsightly appearance of the floor, which must be solved by the decorative ceiling, while the single-beam joint makes the width of the floor beam larger, which is both Increase the weight of the structure and cause waste of materials, and affect the beauty of the floor

(3) The application of nodes is not flexible

At present, the joints used in the project are only applicable to the conventional situation. For the special floor layout, such as non-orthogonal beam system, the elevation and height of each beam are different, its application is limited to a certain extent.

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