A building anti-seismic escape staircase

Abstract

The invention discloses an anti-seismic escape staircase for a building, which comprises a plurality of stair platforms, each of which is installed on the top of a ring beam, the ring beam is supported by a structural column, adjacent stair platforms are connected by stair slabs, and two rows of stairs A central pillar perpendicular to the horizontal plane is set between the slabs, and a boss protruding from the bottom surface of each stair slab is arranged in the middle of the bottom surface of each stair slab. A support arm is provided at the bottom of each boss, and each support arm is connected with the central pillar. A buffer pad is installed between the support arm and the boss, and a reserved hole is set in the middle of the stair slab. The upper end of the reserved hole communicates with the top surface of the stair slab, and the lower end of the reserved hole communicates with the bottom surface of the stair slab. Embedded columns are installed in the reserved hole. The lower end of the pre-embedded column is connected with the supporting arm, and the reserved hole is filled with concrete. The present invention has the advantages of effectively improving the seismic strength of building stairs, keeping valuable escape and rescue passages for people during and after earthquakes, and reducing the number of casualties in earthquake disasters.

Description

technical field [0001] The invention relates to a building staircase, in particular to a building anti-seismic escape staircase. Background technique [0002] In recent years, with the continuous growth of urban population density, more and more multi-storey and high-rise buildings have been put into use in large quantities. In multi-storey or high-rise buildings, people mostly use elevators to go up and down. It becomes the only escape route for people on the 2nd floor and above, but the applicant finds after analyzing the damage of the buildings that have not completely collapsed in the earthquake-stricken areas that have occurred in several destructive earthquakes in my country in recent years, although the building The main part of the building has not yet collapsed, but most of the stairs in these buildings have collapsed in the earthquake, and even some buildings far from the epicenter have broken and deformed stairs in the middle when the main part is basically intact. ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the continuous growth of urban population density, more and more multi-storey and high-rise buildings have been put into use in large quantities. In multi-storey or high-rise buildings, people mostly use elevators to go up and down. It becomes the only escape route for people on the 2nd floor and above, but the applicant finds after analyzing the damage of the buildings that have not completely collapsed in the earthquake-stricken areas that have occurred in several destructive earthquakes in my country in recent years, although the building The main part of the building has not yet collapsed, but most of the stairs in these buildings have collapsed in the earthquake, and even some buildings far from the epicenter have broken and deformed stairs in the middle when the main part is basically intact.

The applicant, after analyzing the stairs of many buildings with different degrees of damage, found that the stairs will first produce cracks in the middle during the earthquake, and the concrete structure of the stairs will be broken at the cracks. At this time, the upper and lower parts of the stairs are only It is connected by the steel bars at the cracks, and the steel bars are difficult to maintain the original shape of the stair boards, so the stair boards will be sunken downwards at the cracks in the middle. Cracks are produced at the joint between the top of the slab and the floor slab, causing the concrete here to break. At this time, the weight of the entire stair slab is applied to the steel bars at the joint between the top of the stair slab and the floor slab. Bending occurs, its own strength has been greatly reduced, and it is very easy to be completely broken when the escapees pass by or in the aftershocks, causing the whole stair board to fall, and as long as one stair board falls in the building, all the stairs below it will be damaged. The slabs will collapse accordingly, causing people to lose the only escape and rescue channel, and the collapse of the stair slabs will also cause fatal injuries to the people who are escaping on the stairs.

Images