Partially-prefabricated reinforced concrete aseismic stairway and construction method thereof

Abstract

A partially prefabricated reinforced concrete anti-seismic staircase and its construction method. The staircase consists of a lower stair section board, an upper stair section board, a lower platform board, an upper platform board, a platform frame, a polytetrafluoroethylene board, a floor platform board, a platform beam, and a sealing strip , frame beams, connecting beams and frame columns, in which the platform frame is a prefabricated reinforced concrete member; the lower stair slab and the lower platform slab are integrally poured, and the upper stair slab and the upper platform slab are integrally poured; the lower platform slab and the upper platform slab are both Riding on the platform frame, there are two layers of polytetrafluoroethylene boards between the upper platform board and the platform frame; there is a gap between the lower platform board and the upper platform board. In the construction of the stairs, the platform frame is prefabricated first, a layer of polytetrafluoroethylene board is fixed on the platform frame, and the lower stair slab, the lower platform slab and the structural components of the lower floor are poured at the same time, and then the upper stair slab, upper platform slab and upper structural members. The invention can reduce the shock damage of the stairs without affecting the shock resistance of the main structure.

Description

technical field [0001] The invention relates to the field of stairs in reinforced concrete frame structures. Background technique [0002] The stair slab is inclined. Under the action of horizontal earthquake, the force of the stair slab is similar to that of the oblique support. It bears a large horizontal force, and the stair slab and other stair components are easily damaged. At the same time, the inclined stair slab The plate also has a certain influence on the lateral stiffness and stiffness distribution of the main structure, and has a greater impact on the frame structure with weaker stiffness. Taking structural measures to reduce the impact of stairs on the main structure is an effective solution. The common construction measures for anti-seismic stairs are not very reasonable, especially the construction method is relatively complicated. In order to realize the sliding function, it cannot be poured at the same time as the floor structure, and there are cold constru...

AI Technical Summary

Problems solved by technology

The common construction measures for earthquake-proof stairs are not very reasonable, especially the construction method is relatively complicated. In order to realize the sliding function, it cannot be poured at the same time as the floor structure. There are cold construction joints, which is not economical and also makes the stairs have weak parts

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