Artificial earthquake batters replica house

 作者:齐纽馕     |      日期:2019-03-02 06:15:00
By New Scientist staff and AFP (Image: Network for Earthquake Engineering Simulation) A simulated 6.7-magnitude earthquake was set off in a New York laboratory on Tuesday to test how a house would stand up to the shaking. The test was carried out at the University at Buffalo, part of the State University of New York. A three-bedroom house, complete with plates on the kitchen table and a car in the garage, was built on top of a “shake table” and rigged with hundreds of sensors before being subjected to the violent wobble test. The simulated quake, which lasted just a few seconds, sent furniture and televisions flying around. It caused surprisingly little damage to structure and, most unexpectedly, all the windows remained intact. The test was co-ordinated by researchers from five different US universities as part of a four-year research project aimed at helping architects design houses for earthquake-prone areas. “This test is monumental in terms of data gathering. We have a wealth of data,” says lead investigator Andre Filiatrault. “Perhaps this knowledge now can trickle down to better provisions, requirements and building codes,” Filiatrault adds, “so that we can save more lives.” The simulation was the largest ever conducted on a wooden building, the researchers say. More than 250 sensors were used to gather detailed information from each part of the house and a dozen video cameras – eight inside and four outside – also recorded the shaking. John van de Lindt, principal investigator at Colorado State University, says the results of the test will “probably change the way we model wood-frame structures”. The simulated quake was designed to replicate the Northridge quake that struck Los Angeles, California, in 1994, causing extensive damage to wooden-built homes in particular. The disaster left more than 50 people dead and thousands more homeless, and caused more than $40 billion-worth of damage. Another research project will test a six-story wooden-frame building on the world’s largest shake table in Miki, in Hyogo prefecture, Japan,