"Our objective in visiting ground zero was to go and look at the buildings surrounding the World Trade Center, those buildings that are still standing, but that sustained damage," said Mr.Bruneau, Ph.D."Our immediate hope is that we can develop a better understanding as to why those buildings remain standing, while our long-term goal is to see whether earthquake
technologies can be married to existing technologies to achieve enhanced performance of buildings in the event of terrorist attacks," he added.
Photographs taken by the investigators demonstrate the monumental damage toe World Trade Center towers and buildings nearby.One building a block away from the towers remains standing, but was badly damaged."This building is many meters away from the World Trade Center and yet we see a column () there that used to be part of that building," explained A.Whittaker, Ph.D."The column became a missile that shot across road, through the window and through the floor." ,
The visit to the area also brought some surprises, according to the engineers.For example, the floor framing () system in one of the buildings was quite strong, allowing floors that were pierced by tons of falling debris () to survive."Good framing systems may provide a simple, but reliable strategy for blast resistance," he added.Other strategies may include providing alternate paths for gravity loads in the event that a load-bearing column fails."We also need a better understanding of the mechanism of collapse," said A.Whittaker."We need to find out what causes a building to collapse and how you can predict it."
【浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(21)含答案】相关文章:
★ 江苏省扬州市2014高考英语一轮 阅读理解暑假练习题(10)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:24(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:26(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(5)含答案
★ 浙江省湖州市2014高考英语完形填空一轮(暑假)精炼(1)含答案
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(13)含答案
★ 2017高考四川省广安市英语阅读理解一轮系列训练:21(含解析)
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(16)含答案
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(3)含答案
★ 浙江省湖州市2014高考英语阅读理解一轮(暑假)精炼(19)含答案
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21