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Shenzhen SEG Building closed after shaking, evacuees: chairs were obviously shaking [Copy link]


Shenzhen Special Zone Daily reported on May 18 that the landmark SEG Tower located in Huaqiangbei, Futian District, Shenzhen, shook and the office workers inside fled in a hurry.

Regarding this incident, the official Weibo account of Shenzhen Emergency Management Bureau @深圳急警管理 reported that at about 13:50 on May 18, the duty room of Shenzhen Emergency Management Bureau received a report: SEG Building in Huaqiang North Street, Futian District, Shenzhen was shaking. After checking and analyzing the data of various earthquake monitoring stations in the city, our bureau found that no earthquake occurred in Shenzhen today. The relevant departments are investigating the cause of the shaking of SEG Building.

On the afternoon of the 18th, The Paper learned from the Shenzhen Fire Brigade that after the incident, the Shenzhen Fire Department had received the alarm and arrived at the scene to deal with the situation.

Several videos circulating on the Internet showed that many people were evacuating and leaving the SEG Building in Huaqiangbei, Shenzhen. Another video showed that the SEG Building seemed to be shaking.

On the afternoon of the 18th, a staff member of the SEG Plaza Management Office of Shenzhen SEG Property Development Co., Ltd. told The Paper that at about 13:00 on the 18th, the SEG Plaza building shook slightly. After the incident, the people in the building were evacuated immediately and there were no casualties. Currently, the building is closed and relevant government departments are investigating the cause of the building shaking.

On the afternoon of the 18th, Ms. Xu, who evacuated from SEG Building, told The Paper that she worked on the 51st floor of SEG Building. At around 12:15 on the 18th, she and her colleagues were having lunch in the office. One colleague said "there was shaking", but other colleagues said it was not obvious, so no one paid attention. After lunch, she was preparing for a lunch break. At around 13:05, "the chair was shaking quite obviously, and everyone felt it." So she and her colleagues ran out and found that many people were running outside.

"The management office downstairs was also evacuated. There was no congestion and no panic." Ms. Xu said that there are two elevators in SEG Building. It is most convenient to go down from the 51st floor by walking up the stairs to the 45th floor and then taking the elevator. She walked up the stairs to the 45th floor and then took the elevator down. "Some colleagues also walked directly from the 51st floor to the first floor. Many people took the elevator at that time."

"The shaking was not very strong, and it was different from the feeling of an earthquake. I just felt the chairs shaking noticeably, and the pillars in the building also shook noticeably if I leaned against them." Ms. Xu said that at present, no one knew the reason and the SEG Building was temporarily closed.

At around 2 p.m. on the 18th, a staff member of the SEG Building Management Office responded to The Paper that at present, people in the building have basically been evacuated, and staff are still checking whether there is anyone in the building. As to why the shaking occurred, the matter is still under investigation.

Public information shows that SEG Tower is 355.8 meters high and has more than 70 floors. It was completed in 1999 and is a landmark building in Shenzhen's Huaqiangbei.

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Was there something wrong with the way this building was built? You can't fool the people without any sense of security.   Details Published on 2021-5-24 23:50
 
 

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The swaying of the building is quite scary. It is so high.

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Under certain wind direction, the wind blows the building at a certain frequency, and this frequency is exactly the same as the building's resonance frequency, so resonance will occur. If the resonance lasts for a long time, you will feel obvious shaking. This is a low-probability event and should not be a big deal.

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Won't it collapse?  Details Published on 2021-5-19 14:45
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chunyang posted on 2021-5-19 13:27 Under a certain wind direction, the wind blows the building at a certain frequency, and this frequency happens to be equivalent to the resonant frequency of the building, so resonance will occur, resonance...

Won't it collapse?

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No, because the conditions for the building to resonate due to wind are very harsh, and the key is that it cannot last long enough, so there is no precedent. But a strong enough resonance may damage the local structure and exterior decoration, etc. Repairs may be necessary, and it is not ruled out that measures such as improving damping characteristics can be taken to reduce the destructiveness of the resonance. However,  Details Published on 2021-5-19 14:57
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soso posted on 2021-5-19 14:45 Will it not collapse?

No, because the conditions for wind-induced resonance in buildings are very harsh, and the key is that it cannot last long enough, so there is no precedent. But strong enough resonance may damage local structures and exterior decoration, etc. Repairs may be necessary, and it is not ruled out that measures such as improving damping characteristics can be taken to reduce the destructiveness of resonance. However, there are many precedents of bridges collapsing due to resonance caused by wind.

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Have you found the reason?

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It still feels a bit dangerous. Looking at other videos, the tilt angle is still quite large.

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Was there something wrong with the way this building was built? You can't fool the people without any sense of security.

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