Reinforced concrete platy stair with simple sliding support and construction method

Abstract

The invention relates to a reinforced concrete platy stair with a simple sliding support and a construction method, which belong to the field of civil engineering and are mainly used for building engineering. The reinforced concrete platy stair is a cast-in-place concrete platy stair, the upper end of a stair section plate and an upper-end supporting component connected to a main body structure are in integral casting, and the simple sliding support is arranged at the lower end of the stair section plate. The method includes that the stair section plate and a lower-end supporting component or a stair beam bridging piece are separately provided with bars and are in pouring separately, the lower end of the stair section plate is shelved on the lower-end supporting component, the upper surface of the lower-end supporting component is a smooth and flat horizontal plane, a plastic film isolating layer is fully laid on the horizontal plane, so that the lower-end supporting component is isolated from the lower end of the stair section plate, the sliding support is formed and is used as a pouring bottom formwork at the lower end of the stair section plate during construction, and the lower end of the stair section plate is also isolated from a building surface layer of the supporting component. The problem that the stair is broken in advance during earthquake and adverse influences to the main body structure are avoided due to the sliding support, earthquake damage is relieved, and the reinforced concrete platy stair is simple, economical and durable, and can be widely used for multiple high-rise building structures and particularly concrete structures.

Description

technical field [0001] The invention relates to a reinforced concrete slab staircase provided with simple sliding bearings and a construction method, which belongs to the field of civil engineering and is mainly used in construction engineering. Background technique [0002] Reinforced concrete slab stairs are one of the most widely used staircase construction forms in buildings. However, this type of cast-in-place reinforced concrete staircase built in the traditional way is poured together with the upper and lower supporting members. The stair slab is used as an oblique member to participate in the lateral force resistance work, which increases the rigidity of the main structure and leads to uneven distribution of rigidity in the floor plane. , has a great impact on the overall analysis results of the structure; and this approach often leads to the stairwell becoming the first anti-seismic defense line of the structure, which will be destroyed first under strong earthquake...

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in the construction methods proposed by the existing literature atlas for this type of sliding bearing, such as relatively complex structure, high cost, and inconvenient construction, so it has not been used much in actual engineering.

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