Joint reinforced type fabricated steel pipe concrete connecting structure and construction method thereof

Abstract

The invention relates to a joint reinforced type fabricated steel pipe concrete connecting structure and a construction method thereof. The joint reinforced type fabricated steel pipe concrete connecting structure comprises an upper steel pipe column, a lower steel pipe column and a joint connecting piece used for connecting the upper steel pipe column and the lower steel pipe column through bolts, wherein the upper and lower ends of the joint connecting piece separately extend into the inner parts of the upper steel pipe column and the lower steel pipe column; through holes penetrating vertically and used for connecting the upper steel pipe column and the lower steel pipe column in a communicating mode are arranged in the joint connecting piece; and the upper steel pipe column, the lowersteel pipe column and the through holes are filled with concrete. The joint reinforced type fabricated steel pipe concrete connecting structure has simple and reasonable structure, low hoisting requirement, no welding operation on site, fast and reliable connection, convenient construction and good construction quality; and meanwhile, steel pipes at the joint can achieve locally reinforcing, the columns can be easily changed into section, and the stress performance and integrity are good.

Description

Technical field: [0001] The invention belongs to the technical field of steel and concrete combined structures in civil engineering, and in particular relates to a node-reinforced assembled steel pipe concrete connection structure and a construction method thereof. Background technique: [0002] In traditional concrete-filled steel tube multi-story buildings, each section of steel pipe hoisted on site can generally reach more than ten meters. When the cross-section of the steel pipe is larger, its own weight is greater, and the hoisting requirements for hoisting machinery are relatively high; In most places, on-site welding is used. This connection method has open flame operations on site, and the construction quality is difficult to guarantee. [0003] The commonly used method for CFST joints is the externally reinforced ring plate. During construction, the externally reinforced ring plate and steel beams are usually welded in advance in the entire steel pipe. During the st...

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Problems solved by technology

[0002] In traditional concrete-filled steel tube multi-story buildings, each section of steel pipe hoisted on site can generally reach more than ten meters. When the cross-section of the steel pipe is larger, its own weight is greater, and the hoisting requirements for hoisting machinery are relatively high; In most places, on-site welding is used. This connection method has open flame operations on site, and the construction quality is difficult to guarantee.

[0003] The commonly used method for CFST joints is the externally reinforced ring plate. During construction, the externally reinforced ring plate and steel beams are usually welded in advance in the entire steel pipe. During the stress process of this kind of joint, the steel pipe may buckle at the joint, which makes the bearing capacity and The mechanical performance is reduced, so that the goal of strong joints and weak members cannot be achieved, so it is necessary to find a way to locally strengthen the joints

However, since the steel pipe at the joint is long, it is difficult to locally strengthen the steel pipe at the joint

If the method of thickening the re-welded steel pipe is adopted, the thickened steel pipe under the load will easily create a gap with the original node steel pipe and cannot work together

In addition, it is difficult to achieve variable cross-sectional size or cross-sectional form in the column length for long steel pipe columns

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