Shock-absorbing stair adopting supporting type energy-dissipation device

Abstract

The invention relates to a shock-absorbing stair adopting a supporting type energy-dissipation device. The shock-absorbing stair comprises steel shotcretes, dampers, frame beams, frame columns, secondary beams, ladder beams, ladder columns, step plates and connecting parts, wherein one end of the steel shotcrete energy-dissipation device composed of the dampers and the steel shotcretes is hinged to the ladder beams through anchorage plates and connecting plates, and the other end of the steel shotcrete energy-dissipation device is hinged to the secondary beams through the anchorage plates andthe connecting plates; and under the action of earthquake, when relative deformation exists between layers, the supporting type energy-dissipation device provides a certain damping force through axialdeformation so as to limit the deformation amplitude of ladder columns and frame columns, avoid the damage of the step plates and improve the additional damping of the whole structure. By reasonablydesigning the yield force and limit displacement of the supporting energy-dissipation device, the supporting type energy-dissipation device can provide rigidity and smaller damping force in case of frequent earthquakes, and provides larger damping force in case of earthquake fortification and rare earthquakes. The shock-absorbing design of the shock-absorbing stair does not need to occupy extra use space, and further saves the cost of the steel shotcretes when installing the damping devices.

Description

technical field [0001] The invention relates to a stair, in particular to a shock-absorbing stair adopting a support type energy dissipator, which can be applied to the aseismic design and shock-absorbing control of the stair-frame structure. Background technique [0002] Stairs are an essential part of a building, but the seismic design of this component has not received the "essential" emphasis for a long time. This may be related to the positioning of stairs in the traditional building structure design system, that is, they only exist as vertical traffic passages on floors, and their contribution to the lateral force resistance of the structure is not considered. However, in the actual construction drawings, measures to isolate the effective connection between the staircase and the frame components were not taken. Therefore, under the earthquake, the force of the staircase components in the frame structure designed according to the traditional method and its influence on ...

AI Technical Summary

Problems solved by technology

However, in the actual construction drawings, measures to isolate the effective connection between the staircase and the frame components were not taken. Therefore, under the earthquake, the force of the staircase components in the frame structure designed according to the traditional method and its influence on the frame structure are seriously inconsistent with the design assumptions.

According to the existing data, the stairs designed only considering the vertical gravity load have performed poorly in previous earthquakes

The damage of the stairs as an escape channel in the earthquake will obviously seriously delay the time of escape and rescue, causing casualties; serious

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