2015年職稱英語考試模擬題之閲讀
本文導航
第1頁:文章
第2頁:試題
第3頁:答案
Can Buildings Be Designed to Resist Terrorist Attack?
In the aftermath of the terrorist attack on the World Trade Center, structural engineers are trying bard to solve a question that a month ago would have been completely unthinkable:Can building be designed to withstand catastrophic blasts inflict4ed by terrorists?
Ten days after the terrorist attacks on the twin towers, structural engineers from the University at Buffalo and the Multidisciplinary Center for Earthquake Engineering Research (MCEER) headquartered at UB traveled to ground zero as part of a project funded by the National Science Foundation. Visiting the site as part of an MCEER reconnaissance visit, they spent two days beginning the task of formulating ideas about how to design such structures and to search for clues on how to do so in buildings that were damaged, but still are standing.
“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 M. 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 engineering 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 in startling detail the monumental damage inflicted on the World Trade Center towers and buildings in the vicinity. 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 the road, through the window and through the floor.”
The visit to the area also revealed some surprises, according to the engineers. For example, the floor framing system in one of the adjacent buildings was quite rugged, allowing floors that were pierced by tons of falling debris to remain intact. “Highly redundant ductile framing systems may provide a simple, but robust 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.”
A Reinhorn, Ph. D. noted that “Earthquake shaking has led to the collapse of many buildings in the past. It induces dynamic response and extremely high stresses and deformations in structural components. Solutions developed for earthquake-resistant design may be directly applicable to blast engineering and terrorist-resistant design. Part of our mission now at UB is to transfer these solutions and to develop new ones where none exist at present.”
-
2017職稱英語試題衞生A級模擬題:閲讀判斷
2017年職稱英語開始備考啦,為了幫助大家更好地備考,下面是yjbys網小編為大家提供的2017職稱英語試題模擬題練習,希望能幫助大家順利備考複習。以下是職稱英語試題衞生A級模擬題:閲讀判斷。第2部分:閲讀判斷(第16"--'22題,每題l分,共7分)下面的短文後列出了7個句子...
-
職稱英語考試備考技巧2017
技巧就像麪包的膨鬆劑,會讓知識變得更容易消化。以下本站小編整理的職稱英語考試備考技巧,希望對大家有所幫助,更多信息請關注應屆畢業生網!(一)綜合實戰技巧原則:先熟(先做熟悉)先易難(先做容易)先(先做握)(二)綜合實戰步驟:1、第步——瀏覽試題:拿試題要...
-
2017年職稱英語考試《衞生A》閲讀理解專項練習
2017年職稱英語考試複習已開始啦,大家是怎樣備考的呢?下面是yjbys網小編提供給大家關於職稱英語考試《衞生A》閲讀理解專項練習,希望對大家的備考有所幫助。U.S.toStart$3.2BillionChildHealthStudyinJanuaryAstudythatwillcost$3.2billionandlastmorethantwodec...
-
2017年職稱英語考試衞生B短文補全考試題及答案
生活的最大悲劇不是失敗,而是一個人已經習慣於失敗。以下是小編為大家搜索整理的2017年職稱英語考試衞生B短文補全考試題及答案,希望能給大家帶來幫助!更多精彩內容請及時關注我們應屆畢業生考試網!AMemoryDrug?IT’SDIFFICULTTOIMAGINEMANYTHINGSthatpeopl...