Shenzhen鈥檚 wobbling tower 鈥榮afe鈥
Print Edition
A SHAKING skyscraper in the southern China which sent crowds fleeing in panic earlier this year was rocked by wind currents, experts concluded yesterday.
The 300-meter SEG Plaza tower in the city of Shenzhen near Hong Kong began to wobble suddenly on May 18 鈥 prompting the evacuation of hundreds of occupants and causing pedestrians to run for safety.
Officials at the time ruled out an earthquake as the cause of the wobble in the tech hub鈥檚 Futian district.
And they sealed it off to probe the cause.
But a team of engineering experts behind the government probe said they had concluded it was caused by wind-related 鈥渧ortex-induced vibration,鈥 as well as the building鈥檚 ageing mast.
鈥淭he main structure of the SEG Plaza tower is safe under ... normal use conditions, and can continue to be used,鈥 they said in a statement yesterday.
鈥淲e believe that removing the mast can solve the issue of perceptible vibrations in the building.鈥
Demolition and damage repairs will be carried out 鈥渋n the near future.鈥
Large vibrations due to wind or earthquakes 鈥渃an cause fatigue cracks and even collapse鈥 in high-rise buildings, according to an April study in the engineering journal Shock and Vibration.
Experts observed that SEG Plaza 鈥 built in 2000 鈥 shook 21 times between May 18 and 20, when carrying out further tests to determine the extent and cause of the shaking.
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