On January 8, 2022, the person who was sleeping at 1 a.m. was awakened by repeated shocks.
"Not good, it's an earthquake!"
The person who woke up from the vibration immediately woke up his family. At this time, time is life. Before everyone can change their clothes, they run downstairs on their pajamas or cotton coats. In the early morning, the person who ran to the open space downstairs in panic was almost sleepless and was awakened suddenly. I can also see someone running out with his own quilt.
You can clearly feel the whole house is shaking. This earthquake was as high as .9 magnitude
. The earthquake occurred in Qinghai Gateyuan . After 1:45 am to 2:33 am, in less than an hour, there were 5 earthquakes, with a total of aftershocks reaching 12 . After receiving the notice, the firefighters immediately dispatched 754 rescue personnel and 169 fire trucks to the front line. Fortunately, after inspection, no one was injured or killed in , nor did the house collapse , and only some falling items were found.
6 years ago, on July 28, Tangshan A huge earthquake occurred in hrs 7.8. In that earthquake, 1.24 million lives disappeared overnight, 160,000 people were seriously injured in the earthquake, and countless houses collapsed, turning into nothing. It is also the painful lesson this time that has made our country focus more on researching house shockproof technology.
What is earthquake isolation technology?
is literally understood, which means that our house has a certain earthquake isolation effect through technical means. Buildings that use earthquake isolation technology are like people wearing ice skates. They adopt the technical concept of "soft use softness to overcome hardness" to set up rubber earthquake isolation support and damping devices and other equipment between the bottom, lower and upper structures of the building. Use this equipment to reduce vibration of superstructure, and the translation amplitude of superstructure is smaller, which can reduce the seismic effect of 1/4-1/8.
earthquake isolation technology diagram
For example, a magnitude 7 earthquake occurred in a certain area, and a floor without earthquake isolation technology will withstand a real magnitude 7 vibration. Under such a big earthquake, ordinary houses will collapse instantly. For buildings with earthquake isolation technology, the magnitude of that is about 4.5, greatly reducing the degree of damage.
Now the earthquake isolation technology used in our country is stacked rubber support to achieve the purpose of shock absorption. After many tests, this technology is the most significant earthquake-resistant technology at present. The most wonderful thing about earthquake isolation technology is the foundation. The foundation part is like a spring, buffering the structure of the upper part to achieve the purpose of reducing damage. Today, seismic isolation technology has been widely used in high-rise buildings in many regions of our country.
Tianjin International Trade Center has applied earthquake isolation technology
What is more worth mentioning is the "capped" application of subway. The design of subway is different from that of houses and buildings, and it is difficult to achieve earthquake resistance. After many tests by professionals, the subway building was finally equipped with a combination of horizontal slip support and velocity hysteresis viscodampers. The seismic effect of the subway stairs up the stairs using this technology has been significantly reduced. If there is a sudden earthquake, it will not be worrying about collapse. Today, Beijing’s Lines 6, 8 and 16 use earthquake isolation technology, adding a strong touch to our country’s earthquake isolation technology.
subway cover earthquake isolation building multi-target integrated design
China earthquake isolation technology
Many areas in our country are in areas prone to earthquakes. For example, all areas in Yunnan are in 6-degree fortification zones, and up to 78.6% of the areas are in 7-8-degree fortification zones. Since the 1980s, experts in our country have focused on seismic isolation technology and have proposed a complete set of rubber support seismic isolation construction technologies.
In 2013, a magnitude 7 earthquake occurred in Ya'an . Some houses were damaged in particular because these small damaged houses used earthquake isolation technology. In addition to being used in house buildings, seismic isolation technology is now widely used in bridge buildings, airport terminals and other places. For example: Kunming Changshui International Airport Terminal , Beijing Airport Terminal, etc.
At present, many provinces in our country have applied this technology. Houses that have used this technology can basically ensure that major earthquakes will not collapse. Moreover, the larger the earthquake magnitude of , the better the earthquake resistance effect.
We once again saw the power of house shockproof technology from this 6.9-magnitude earthquake in the Qinghai Menyuan. At present, my country has more than 10,000 shock-absorbing buildings, accounting for 1/2 of the world, and the seismic isolation technology covers 890,000 square meters. We can also say proudly that China ranks first in the world in the total number of earthquake-isolated technical buildings!
As time goes by, our country's construction shockproof technology has also been becoming increasingly perfect. I hope this technology can cover all buildings in full and strive to avoid fear of earthquakes as soon as possible and earthquakes will have zero damage!
References:
【1】Application and research of seismic isolation technology in high-rise buildings_Li Dali Hubei University of Technology CNKI 2015-06-01
【2】A discussion on the feasibility of seismic isolation technology for nuclear power engineering_Xie Lili Earthquake Engineering and Engineering Vibration CNKI 2012-02-15
【3】Seismic performance analysis of basic seismic isolation frame structure_Zhang Ruijun Taiyuan University of Technology CNKI 2016-05-01
【4】Application of seismic isolation technology in modular buildings_Huang Dunjian Guangzhou University CNKI 2016-06-01
【5】Application of seismic isolation technology for long-union large span continuous beam bridge_Xia Xiushen Bridge Construction CNKI 2015-08-28
Author: Yijun Proofreader Editor: Li Zi
