Anti-seismic assembled stair supported by fixed upper end and slidably connected lower end

Abstract

The invention discloses an anti-seismic assembled stair supported by a fixed upper end and a slidably connected lower end. The stair comprises a horizontally arranged platform, an obliquely arranged upper ladder beam with a high left end and a low right end and an obliquely arranged lower ladder beam with a low left end and a high right end, wherein the upper ladder beam and the lower ladder beamare of assembled steel concrete combined structures, a platform beam is arranged at the bottom of the left side of the platform along the front-rear horizontal direction, a plurality of support corbels are arranged on the platform beam, the front side part of the right end of the upper ladder beam is connected with at least two support corbels through a sliding connection support assembly, and therear side part of the right end of the lower ladder beam is fixedly connected with at least two support corbels. The stair has light weight, strong stability of the steel concrete combined structure,good damping and sliding regulation effects, and can avoid the generation of cracks or even fractures caused by stresses generated between the upper ladder beam and the lower ladder beam and the platform.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings, and in particular relates to an anti-seismic prefabricated staircase with a fixed upper end and a sliding connection support at the lower end. Background technique [0002] Traditional stairs generally use cast-in-place reinforced concrete stairs or prefabricated reinforced concrete stairs. Although cast-in-place reinforced concrete stairs have great advantages in firmness, sound insulation and maintenance-free, the reinforced concrete stairs have a large dead weight and require formwork , Rebar binding, on-site pouring and maintenance and other complex processes have disadvantages such as long construction period, many hidden projects, and poor quality controllability; prefabricated reinforced concrete stairs have disadvantages such as self-heavy, large-scale mechanical installation, and complicated on-site connection nodes. , subject to certain restrictions in the promotion and ...

AI Technical Summary

Problems solved by technology

[0002] Traditional stairs generally use cast-in-place reinforced concrete stairs or prefabricated reinforced concrete stairs. Although cast-in-place reinforced concrete stairs have great advantages in firmness, sound insulation and maintenance-free, the reinforced concrete stairs have a large dead weight and require formwork , Rebar binding, on-site pouring and maintenance and other complex processes have disadvantages such as long construction period, many hidden projects, and poor quality controllability; prefabricated reinforced concrete stairs have disadvantages such as self-heavy, large-scale mechanical installation, and complicated on-site connection nodes. , subject to certain restrictions in the promotion and application process

Whether it is cast-in-place reinforced concrete stairs or prefabricated reinforced concrete stairs, there are still defects of poor seismic performance. It is difficult to control the vibration displacement of the stairs in the up and down, left and right, and front and rear directions under the action of an earthquake. break and endanger safety

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