Steel structural beam type sliding stair and construction method

Abstract

The invention belongs to the technical field of design of steel structural buildings, and particularly relates to a steel structural beam type sliding stair and a construction method. The steel structural beam type sliding stair is formed by a stair base, a limit sliding device, a bottom frame beam and a structural frame beam which is provided with lifting lugs, a double-sleeve limit connector anda rubber pin shaft connecting part; the limit sliding device is connected to the beam type stair base; the lower part of a stair beam is connected with the beam type stair base through the limit sliding device; and a stair beam which is not at the bottom is detachably connected with the structural frame beam which is provided with the lifting lugs, the double-sleeve limit connector and the rubberpin shaft connecting part. According to the steel structural beam type sliding stair and the construction method, the risk that a staircase is damaged before a main structural body under the workingcondition of earthquake can be effectively reduced, workload of field welding is reduced, a design process is simplified, construction efficiency is increased, and the use structure is relatively safeand reliable.

Description

technical field [0001] The invention belongs to the technical field of steel structure buildings, in particular to a steel structure beam type sliding staircase and its construction method. Background technique [0002] With the increase of steel structure buildings, more and more multi-storey and high-rise steel structure buildings appear in our lives. However, the design of steel structure stairs has always troubled structural designers. Conventional beam-type steel structure stairs usually use welding methods to connect with the main structure. Rigid connection, this method has the following disadvantages: [0003] 1. The force of the joint area is complex. The joints connected by welding not only transmit vertical shear force, but also transmit large joint bending moment under the action of earthquake force. The traditional welded connection will cause the connection part of the beam stair joint to bear a large bending moment before the main body of the structure is des...

AI Technical Summary

Problems solved by technology

[0003] 1. The force of the joint area is complex, and the joints connected by welding not only transmit the vertical shear force, but also transmit a large joint bending moment under the action of the earthquake force

The traditional welding connection will cause the connection part of the beam stair joint to bear a large bending moment before the main body of the structure is destroyed

[0004] 2. As required by the structural seismic design code, the stairwell should be effectively separated from the main structure, and should not be involved in the overall force calculation of the structure; if the structural design does not take corresponding structural measures to effectively separate the stairwell from the main structure, the stairwell will be compared Large stiffness should be involved in the calculation of the overall force of the structure, which will lead to further aggravation of the structural calculation

Due to the design flaws of the traditional steel structure beam staircase, under the action of an earthquake, the joints of the stairwell will bear a large bending moment and be damaged before the main body of the structure, which cannot guarantee the safety and effectiveness of the escape route.

[0006] 4. Welding connections are not conducive to efficient construction, resulting in the inability of some prefabricated steel components to be spliced ​​and installed quickly and reasonably on site

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