PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Application of PTFE Plate in Earthquake Resistant Disaster
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-12-07
Visits:
Life is precious and fragile. Every year, the collapse of the housing structure caused by the earthquake causes a large number of casualties and property losses, especially
The emergency evacuation staircase used in the life passage was distorted and broken when the earthquake occurred, thus blocking the escape route of a large number of innocent lives.
The investigation and research of the previous earthquake damage found that the phenomenon of distortion and fracture damage of the stair structure plate in the building after the earthquake is very common; this is due to the traditional stairwell in the knot.
In the design of the structure, the stair structure plate is permanently formed into an integral reinforced concrete structure beam plate, and the main structure is rigidly connected, and the stairs are not considered to participate in the earthquake, especially the multi-
Floor frame structure of the indoor reinforced concrete structure of the stairs, because of its often limited by the plane layout and the structure of the impact of the form of force, often become a seismic weak link long-term by people.
Neglected; The revised seismic design code clearly stipulates that the stair structure must be incorporated into the seismic calculation model for seismic design.
At present, given the relevant test results in the field of seismic research of domestic buildings, a simple and effective damping structure-sliding stairs has been used in structural design and gradually.
Step into the application of construction practice, and PTFE plate PTFE is currently known as the smallest coefficient of friction (0.04) of solid materials, but also has the characteristics of not adhering to any substances.
And superior anti-aging performance, through the installation and fixation of the construction link, the node structure of the sliding staircase formed by the construction is equivalent to the role played by the damping shock absorber.
to effective earthquake mitigation, reduce casualties and property losses of the seismic effect.
Figure 1: PTFE sheet Source: Dankai
The structure design of the sliding staircase adopts the link support method, and the isolation material PTFE plate set in the isolation layer is used. When a local earthquake occurs, the hinged support of the sliding staircase can be used.
It is enough to quickly dissipate the seismic horizontal acceleration energy as much as possible in the damping layer (PTFE plate isolation layer) to achieve the conversion and dissipation of the kinetic energy of the seismic horizontal acceleration.
The amount of damage to the staircase structure, reduce the seismic wave impact on the structure, especially the weak link-reinforced concrete structure of the staircase damage Chengdu.
The sliding staircase adopts an open hinged support, and an isolation layer is arranged at the conversion of the staircase mechanism. The support uses the high lubrication performance, high damping and shock absorption of PTFE plate and does not
The adhesion characteristic is used as an isolation layer material, and the shock-absorbing isolation layer is set up, which is equivalent to setting up a damping shock absorber at the structural stair transfer floor, which can reduce or reduce the impact of earthquakes on the construction.
The destruction of the structure of the building stairs.
The anti-seismic mechanism design of sliding stairs has gradually entered the stage of engineering construction application because of its simple process, convenient structure construction and remarkable seismic effect.
With the goal of "not bad for small earthquakes and not falling for large earthquakes", the purpose of earthquake resistance and disaster reduction and earthquake damage reduction is achieved, which has high social benefits and promotion value.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, stairs, structure, earthquake resistance, slip, earthquake, damping, separation, high lubricity, non-stick
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