韩国健身者练操震动大楼摇摆10分钟_BEC初级作文

韩国健身者练操震动大楼摇摆10分钟

6日韩国首尔的电器电子商城Techno Mart突然上下震动10分钟左右，商城内数百人以为发生地震，紧急疏散。但专家经调查后认为，这次震动起因是大楼里有一个健身中心，参加健身项目的学员集体跳动引起震动。

韩国健身者练操震动大楼摇摆10分钟

Photo illustration shows women attending an aerobic class. South Korean experts said Tuesday they believe a vigorous gym exercise session caused a high-rise building in the capital to shake for 10 minutes this month, prompting hundreds to flee in panic。

South Korean experts said Tuesday they believe a vigorous gym exercise session caused a high-rise building in the capital to shake for 10 minutes this month, prompting hundreds to flee in panic。

They said tests showed that oscillations created by a group of Tae Bo practitioners on the 12th floor of the 39-story TechnoMart mall building apparently resonated through the structure。

Tae Bo is an aerobic exercise routine that involves performing the motions of boxing and martial arts such as Taekwondo at a rapid pace。

Professor Chung Lan of Danguk University in Yongin City near Seoul linked the incident to a physics principle under which catastrophic failures can occur when the vibration of a structure is matched by another source。

He told a radio programme that the building, constructed from iron girders and cement, had a characteristic vibration frequency which was "in phase" with the synchronised movements of the Tae Bo practitioners。