Full precast concrete stair sliding connecting system and construction method thereof

Abstract

The invention discloses a full precast concrete stair sliding connecting system. The full precast concrete stair sliding connecting system comprises an upper-layer laminated beam plate, a lower-layer laminated beam plate and a precast stair, wherein the upper-layer laminated beam plate and the lower-layer laminated beam plate serve as rest platforms, and the precast stair serves as steps. The upper-layer laminated beam plate comprises an upper-layer building surface layer, an upper-layer beam plate cast-in-situ layer and an upper-layer beam plate precast layer from top to bottom; the lower-layer laminated beam plate comprises a lower-layer building surface layer, a lower-layer beam plate cast-in-situ layer and a lower-layer beam plate precast layer from top to bottom; the top side end of the precast stair is connected with the upper-layer beam plate precast layer, and is in lap joint with rebars in the upper-layer beam plate cast-in-situ layer; the bottom surface end of the precast stair is placed on a teflon plate which is placed at a placement position on the top surface of the lower-layer beam plate cast-in-situ layer; the space between the bottom side end of the precast stair and the lower-layer building surface layer is filled with a polystyrene plate. Due to the fact that the mode of connection between the stair and a main body structure is changed, the lower section of the stair is completely separated from the overall structure, the mode that one end is hinged, and the other end is stressed in a sliding mode is formed, the rigidity of the stair is effectively reduced, distribution of shearing force of the stair is reduced, and seismic performance is improved.

Description

Technical field [0001] The invention relates to the technical field of building construction, in particular to a sliding connection system of a fully precast concrete staircase and a construction method thereof. Background technique [0002] Reinforced concrete slab stairs are one of the most widely used stair construction forms in buildings. The cast-in-place reinforced concrete stairs constructed in the traditional way are poured together with the upper and lower supporting members. The slabs are used as diagonal members to participate in the anti-lateral force work. The increased rigidity of the main structure results in uneven rigidity distribution in the floor plan, which has a great impact on the overall result of the structure. [0003] In an earthquake, the stairs become the first anti-seismic line of defense; if they are damaged first under a strong earthquake, it will be difficult to guarantee that the stairwell will serve as an emergency escape route for evacuation and r...

AI Technical Summary

Problems solved by technology

[0002] Reinforced concrete slab staircase is one of the most widely used staircase construction forms in buildings. The cast-in-place reinforced concrete staircase constructed in the traditional way is poured together with the upper and lower supporting members. The increased rigidity of the main structure leads to uneven distribution of stiffness in the floor plan, which has a great impact on the overall result of the structure

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