Limiting device for prefabricated stair sliding support

Abstract

The invention discloses a limiting device for a prefabricated stair sliding support, and is used for limiting the relative sliding movement between a prefabricated concrete stair and a stair beam. Thelimiting device comprises a pull linkage rod (1) and an embedded steel pipe (2), wherein the embedded steel pipe (2) is pre-embedded in the lower part of a stair section platform of the prefabricatedconcrete stair, one end of the pull linkage rod (1) is anchored in the stair beam, the other end of the pull linkage rod (1) is sleeved in the embedded steel pipe (2), and the inner wall of the embedded steel pipe (2) is provided with a contraction-limiting mechanism (21) for limiting the longitudinal contraction of the pull linkage rod (1). According to the limiting device for the prefabricatedstair sliding support, the component stress design is consistent with the deformation direction, the stress is reasonable, and the strength is high; main components are internally arranged, so that appearance of a building is not affected, the durability is good, and the space occupation is small; and the device is easy to construct and install, and the construction connection is reliable.

Description

technical field [0001] The invention belongs to the technical field of seismic isolation of building structures, in particular to a prefabricated stair sliding support limiting device with good overall mechanical performance, good durability, less space occupation, high strength and easy maintenance. Background technique [0002] With the development of housing industrialization, my country's prefabricated buildings have been vigorously promoted. Studies have shown that the structure of the precast concrete staircase's ladder beam and the sliding support between the steps reduces the "diagonal bracing" effect on the building frame structure compared with the cast-in-place concrete staircase, and greatly reduces the possibility of damage to the stair slab when an earthquake occurs sex. [0003] However, the separated structure at the sliding bearing of the precast concrete stairs will have the risk of slipping and detaching from the ladder section and the ladder beam under t...

AI Technical Summary

Problems solved by technology

[0006] In short, the problems existing in the existing technology are: traditional sliding bearings are connected by steel anchors, and the steel bars are prone to corrosion at the main stress-bearing members, which affects the limit function; the cost of rubber isolation bearings is high and complicated, and it is not easy for daily inspection in the later stage Maintenance, installation and design usually need to change the structural size of the components at the sliding support of the stairs, the node connection is complicated, and the application range is restricted; some limit devices installed outside the sliding support of the stairs are in a complicated form of force, and the restraint limit effect Low efficiency and damage to the interior beauty of the building

Images