Published in 1847, WUTHERING HEIGHTS was not well received by the reading public, many of whom condemned it as sordid, vulgar, and unnatural--and author Emily Bronte went to her grave in 1848 believing that her only novel was a failure. It was not until 1850, when WUTHERING HEIGHTS received a second printing with an introduction by Emily's sister Charlotte, that it attracted a wide readership. And from that point the reputation of the book has never looked back. Today it is widely recognized as one of the great novels of English literature.
Even so, WUTHERING HEIGHTS continues to divide readers. It is not a pretty love story; rather, it is swirling tale of largely unlikeable people caught up in obsessive love that turns to dark madness. It is cruel, violent, dark and brooding, and many people find it extremely unpleasant. And yet--it possesses a grandeur of language and design, a sense of tremendous pity and great loss that sets it apart from virtually every other novel written.
The novel is told in the form of an extended flashback. After a visit to his strange landlord, a newcomer to the area desires to know the history of the family--which he receives from Nelly Deans, a servant who introduces us to the Earnshaw family who once resided in the house known as Wuthering Heights. It was once a cheerful place, but Old Earnshaw adopted a "Gipsy" child who he named Heathcliff. And Catherine, daughter of the house, found in him the perfect companion: wild, rude, and as proud and cruel as she. But although Catherine loves him, even recognizes him as her soulmate, she cannot lower herself to marry so far below her social station. She instead marries another, and in so doing sets in motion an obsession that will destroy them all.
WUTHERING HEIGHTS is a bit difficult to "get into;" the opening chapters are so dark in their portrait of the end result of this obsessive love that they are somewhat off-putting. But they feed into the flow of the work in a remarkable way, setting the stage for one of the most remarkable structures in all of literature, a story that circles upon itself in a series of repetitions as it plays out across two generations. Catherine and Heathcliff are equally remarkable, both vicious and cruel, and yet never able to shed their impossible love no matter how brutally one may wound the other.
As the novel coils further into alcoholism, seduction, and one of the most elaborately imagined plans of revenge it gathers into a ghostly tone: Heathcliff, driven to madness by a woman who is not there but who seems reflected in every part of his world--dragging her corpse from the grave, hearing her calling to him from the moors, escalating his brutality not for the sake of brutality but so that her memory will never fade, so that she may never leave his mind until death itself. Yes, this is madness, insanity, and there is no peace this side of the grave or even beyond.
Many people in the world are trying to find a perfect companion.Some of these may marry and not know what their new husband or wife is like.This kind of situation often leads to separation or hostility. Other situations may develop between two friends that stem from jealousy, desire for revenge, uncaring parents, etc. Emily Brontë's Wuthering Heights displays several characteristics of destructive relationships. Three of these are uncaring parents, marriage without knowing the person, and jealousy.
Uncaring or unsympathizing parents are shown throughout this story to be an element of destructive relationships. Because Heathcliff gained all the attention from Mr. Earnshaw, Hindley became disassociated from his father. This separation continued until after Mr. Earnshaw had died.Another example is between Hindley and Hareton. Hindley became such a drunk and a gambler that he could not properly care for young Hareton. This led to a separation between Hareton and his father as well. One primary example of an uncaring parent is shown between Heathcliff and his son Linton.Heathcliff did not even want his son for anything except enacting a part of his revenge. This is shown by Linton's fear of Heathcliff and Heathcliff's enmity toward his son. Linton even says "... my father threatened me, and I dread him - I dread him!"(244) to express his feeling about Heathcliff.The hostility and separation between father and son in this book shows that uncaring parents can cause serious damage in relationships with their children.
This element of destructive behavior may stem from an unhappy marriage in which the husbands or wives don't know each other. This had happened between Isabella and Heathcliff. Isabella did not really know Heathcliff when she married him, but after she had married him she saw that Heathcliff was not a gentleman at all. To declare her feelings she wrote "Is Heathcliff a man? If so, is he mad? And if not, is he a devil? I shan't tell my reasons for making this inquiry; but I beseech you to explain, if you can, what I have married ..."(125). Another example of this is when Catherine married Edgar Linton. Although she had been happy at the beginning of the marriage, she thought having parties all the time was going to be fun. Yet, after a while, she became bored. She also realized that she loved Heathcliff more than Edgar and would always love Heathcliff.This enlightenment created separation between Edgar and Catherine during the final hours of Cathy's life. An additional marriage which was made that was doomed was the one between Catherine and Linton. Because this was a forced marriage, Cathy had not yet learned all she could about Linton.Because she did not know until after the marriage that Linton was selfish and inconsiderate, she became distressed and grew isolated in the house.These three failed marriages described in this novel show that knowing the person you will marry is very important.While these marriages took place, jealousy also took a hold in some relationships. One example of this is when Mr. Earnshaw starts to favor Heathcliff over his own son, Hindley. Because of this, Hindley becomes jealous of young Heathcliff and sets out to make Heathcliff's life a nightmare. Hindley's jealousy becomes evident when he says ,"... be damned you beggarly interloper! and wheedle my father out of all he has; only afterwards show him what you are, imp of Satan."(35). Jealousy was also found very notably in the relationship between Heathcliff and Edgar Linton.
The jealousy between them is expressed when Heathcliff and Edgar start a hostile conversation after Cathy's homecoming at Christmas near the beginning of the book. As the story progresses these two become bitter enemies who will not speak to one another. Another relationship which jealousy ruined is the one between Hareton and Linton. These two become jealous of each other over Cathy's affections. This relationship ends as Hareton and Linton hating each other. These relationships show that jealousy can ruin a relationship very quickly.
The housekeeper Ellen Dean, or we can call her Nelly, tells most of the story. She witnesses the life of the three-generations in the two families. She is a good storyteller but we mustn’t believe all of what she said. She always thinks and considers things in a simple way. She couldn’t understand the deep love between Catherine and Heathcliff. She thinks it is a kind of madness. She is a limited narrator. In a certain way, this helps readers to understand Heathcliff better because he has no chance to defend himself. An outsider will see the whole thing more clearly. However, we should pay more attention not to be affect by her opinions and try to find the truth between the lines.
As a main character Catherine is a paradox. She is attracted by Linton but doesn’t love him. She knows that clearly but she marries Linton without listening to the call of her heart. Many critics believe that what makes her marry Linton is only his high social status and wealth. I think this comment is unfair. In fact, she folly thinks to marry Linton will help Heathcliff “to rise and place him out of my brother’s power.” Her decision ruins herself, Heathcliff and the two families. She has to endure serious suffering because she knows clearly she love Heathcliff whole-heartedly but can’t become his wife. She confesses to Nelly her own thoughts: “…I am Heathcliff—he’s always, always in my mind—not as a pleasure, any more than I am always a pleasure to myself—but as my own being…” She loves Heathcliff because he is more like her than herself. His existence is natural to her for they are the same in nature. They could understand each other without obstacles.
Talking about Heathcliff, he is an evil person but I admire him because his love and hate is straight. Everyone has a devil in his heart. The one in Heathcliff’s heart is especially strong. In spite of this, I believe and can read between the lines that Amily Bronte also has her favor to Heathcliff. She wants to tell us evil and love are deeply planted in everyone’s heart and it is human nature.
这是一篇关于商业投资的英语论文。
Are you investing in the right industry?
Does the term book-to-bill ratio sound familiar to you? Do you know the demand and supply numbers of private condominiums in Singapore for the next year ? If you do, you must have already performed some sort of industry analysis on the electronics and property industries (or sectors as commonly referred to in stockmarket terms).
Most investment processes include some sort of industry analysis. This is important because many studies have shown that over a period of time, some industries have per-formed better than others. For example, between 1987 and 1996, banking stocks in Singapore have generated better returns than other industries such as shiprepair. Industry analyses will uncover these performance differences and help identify both unprofitable and profitable opportunities
(situations).
It is also important to note that past performance alone will not help predict future performance. The factors or conditions that helped an industry to prosper in the past will change over time. Identifying and studying these factors will provide some clues to the entry and exit points of the investments. Going back to our earlier example, economic growth is an important criterion for banks' earnings. Between 1987 and 1996, Singapore enjoyed an uninterrrupted average GDP growth of 8.9%. This allowed the banks' earnings to grow at a compound rate of 11.3% when the broader market generated only 8.5% growth. With GDP growth decelerating because of the Asian crisis, can we maintain the same sanguine outlook for the banks?
Having determined that industry analyses are important for successful investing, the next step is to find out how we can go about doing one. There is no generic framework that is applicable to all industries, but there are commonalities which we can identify. In a free market economy, demand and supply are key determinants of price, and price is always an important contributor to any profit-driven organisation. Hence, a successful indstry ana-lysis will have to identify the underlying fac-tors driving demand and supply.
Factors that drive demand vary across industries, and are too numerous to list. However, it is important to note that demand can be categorised as "seasonal", "cyclical" or "secular". As the word suggests, seasonal fac-tors recur year after year. Cyclical factors, on the other hand, follow
very closely to the economic cycles of the market. Secular factors are more long term in nature. Seasonality or economic cycles will have minimal impact on secular trends.
Take an airline as an illustration. Most Singaporeans take their vacation in December. That is why airline seats are difficult to secure during that time. This is the seasonal factor because it occurs every year around the same time. Having said that, Singaporeans usually take vacations more frequently when the economy is doing well, and less so during reccessionary times. The rise and fall in demand in accordance to economic activities is the cyclical factor. Finally, the middle class population in Singapore has been rising over the last 20 years. This group is generally more affluent. Part of the lifestyle usually includes taking regular vacations to exotic destinations. Such lifestyle doesn't change annually, nor does it follow the ups and downs of economic growth. The demand for air travel will grow so long as the middle class population continues to
increase. This is an example of secular demand.
Classifying demand factors into these categories is very useful. As long-term inves-tors, we do not want to be constantly reacting to signs that are short term and volatile in nature such as seasonal, and to a lesser extent, cyclical trends. Buying and selling stocks based on these short-term trends are not only expensive (brokerage cost) but difficult to time as well. Instead, we should focus on long-term trends. They usually have a longer and more permanent impact on share prices.
A key factor in identifying an attractive industry is pricing power. The ability of an industry to price its product at a profitable level without compromising its business pros-pect is important, and this is affected by many factors. Inelastic demand allows the tobacco producers to maintain good profits despite the rapidly rising tariffs all these years. Barriers to entry is another factor. Mobile-phone charges used to be very expensive because there was only Singapore Telecom providing the ser-vice (monopoly). With increased competition from M1, rates have been declining gradually. All things being equal, the more competitive the industry is, the lower the pricing power, and hence profits. Competition may be good for the consumers, but it seldom benefits the shareholders. Another factor that will impact the com-petitive environment of an industry is the cost structure. In general, indsutries with high fixed costs are more competitive than those that have high variable costs. We often hear about coun-tries being accused of 'dumping steel' onto other countries. Well, this is the case in point. Steel mills are expensive to construct. But once built, the investment costs are 'sunked'. On the other hand, the running cost to produce steel is relatively low. Since there are so many steel mills around the world (almost every country has one for strategic reasons), supply is in abundance. As competition intensifies in the global market, recovering investment cost of the mills becomes a secondary objective for management. What is more important is to keep the production ongoing and sell the steel at a price that can at least cover the variable cost component. These mills will definitely be loss-making, but at least they can continue to operate and not generate serious unemploy-ment for the economy (steel industry is very labour-intensive). Having looked at the fundamental issues, do we always buy into an industry with positive trends developing? The answer is 'no'. Con-fused? Here is why. The key to any successful investments is to stay ahead of what the market is discounting. Suppose we are bullish on the outlook of the residential property sector because owning a home is every Singaporean's dream and the island has limited land supply. But this view is widely observable. Further-more, most of the residential property stocks have already outperformed the market by huge margins. These are signs that the market has probably discounted the positive conclusion of our analysis. As such, the investment upside is probably limited. Conversely, if our conclu-sion unearths new information from the gene-ral market, we may have discovered something interesting here. To confirm that we have a good find, check out the valuation to see if it is attractive. There are many valuation tools, but the commonly used ones are Price/Earnings (PE), Enterprise Value/EBITDA*, Price/Book(P/B), and Dis-counted Cash Flow (DCF). Make a cross-industry comparison as well as historical com-parison. Going back to our property example. If our conclusion is new to the market, the industry is trading at the lower end of its histo-rical PE band, and it is also very attractive on PE terms versus the other industries in Singapore...bingo! In conclusion, I would like to leave you with a brain teaser. Imagine this is 1996 and you are an investor looking at the Dynamic Random Access Memory (DRAM) industry: DRAM is a semiconductor chip used in most electronic products such as personal computers. The business is cyclical in nature because corporate and private consumption of PCs usually rises when the economy is doing well. There are, however, two secular trends that underpin the growth in the industry. First, more and more people are buying PCs for their home and oiffice. Second, the requirement of DRAM per PC is also on the rise as processing power of computer increases exponentially. On the competitive issue, the cost to build a wafer fab is extremely high (about US$1b), and the technology is usually state-of-the-art. Besides capital and technology, there are no other significant barriers to entry. Margin for the industry had been very good because of supply shortage. This probably explained why share prices outperformed the market in 1995. The historical five-year PE band for selected stocks in the industry between 1991 and 1995 was about 10 to 100. The average PE during the period was 30. The industry is currently trading at a PE in the low teens. Would you invest in this industry? (The writer is the Investment Manager of Jardine Fleming Investment Management. This column has the support of the Investment Management Association of Singapore and the Stock Exchange of Singapore.)
In 2002 will be implemented in three 10 X college entrance examination system. College entrance examination system in the reform of English teaching reforms. The key lies in establishing the class-based teaching system (1) listening and speaking. Against the status quo of poor listening and speaking ability of students to open every Monday of English listening and speaking sections. Use the latest teaching listening "to the future", "traveled the United States," "expect English," and other tapes, video tapes and newspapers, using advanced listening equipment in the classroom teaching through listening, speaking, dialogue, performances, lectures and other lively, interesting students heard about the form of training to improve the communication skills of students, training students in the level of oral expression, reversing the pre-existing "dumb-style" English teaching status quo. (2) the addition of extensive reading classes, the establishment of Foreign Language Reading Room. Although the new textbooks to read the current increased, but far from what is needed. In order to expand the scope of the students exposure to English, optional printing a variety of genres, subjects suitable for students to read the article. According to the requirements of content and reading test, teachers will be articles to classify each article in the post-coupled with an appropriate amount of reading comprehension questions. In order to broaden the teaching of English extension, so that extensive reading in English from the curricular and extra-curricular extension to the establishment of foreign language reading acquisition have been published in a variety of domestic suitable for high school students to read English books, will be in English Extensive Reading from the classroom extended to Yuelan Shi to further stimulate students interest in reading and initiative. Subscribe for students in English newspapers and magazines, the establishment of English specialty health system, at any time to give them an open reading rooms and study rooms. Teaching through extensive reading, students can not only consolidate the textbooks and the basics, but also can improve the self-learning ability to develop intelligence, reading to be fun. (3) The creation of writing classes. Poor writing skills for students in English and Chinese-style English sentences in the written expression of uncommon situation, the school can fully use my existing computer software, according to the new textbooks written request, step by step training on the students writing. "English written expression and training", will be Practical, descriptive text, description text and carry out the purpose of discussion, sub-level guidance training. Writing Course opened for the entrance examination is not merely to prepare for the written expression, but also enable students to learn a variety of English style of writing methods and techniques to meet the future requirements of the community of foreign language experts. (4) The implementation of the different levels of English teaching, the successful introduction of English classes and increase class. Students according to their actual English proficiency, the free selection of the successful lessons to enhance our lessons. School teachers to take a listing. The basis of less successful lessons where students can make up for deficiencies in knowledge and a good grasp of double-base implementation, to develop their own non-intellectual factors, promote the improvement of performance and enjoy the joy of success. The basis of good students can participate in improving the high level of English classes comprehensive training to promote their own standard of English to the "high, precision and advanced the" development and outline the task ahead of schedule to prepare for the contest. 2002年全国将实施3十X高考制度。高考制度在改革，英语教学改革势在必行。 关键在于建立各课型教学体系 （1）听说课。针对学生听说能力差的现状，开设每周一节次的英语听说课。选用最新听力教材“走向未来”，“走遍美国”，“希望英语”等录音带，录像带及报纸，利用先进的听音设备，在课堂教学中通过听，说，对话，表演，演讲等各种生动，有趣的形式对学生进行听说训练，提高学生的交际能力，训练学生的口语表达水平，扭转以前存在的“哑巴式”英语教学的现状。 （2）增设泛读课，建立外文阅览室。现行新教材尽管阅读量增加，但远远不能满足需要。为了扩大学生对英语的接触范围，可选印各种体裁，题材适于学生阅读的文章。根据内容和阅读测试的要求，教师将文章进行分类，在每篇文章后配以适量的阅读理解题。为了拓宽英语课堂教学的外延，使英语泛读由课内延伸到课外，建立外文阅览室，购置国内现已出版发行的各种适合中学生阅读的英语读物，将英语泛读由教室扩展到阅览室，进一步激发学生的阅读兴趣和主动性。为学生订阅英文报刊和杂志，建立英语特长生制度，随时给他们开放阅览室和自修室。通过泛读课教学，学生不仅能巩固课本中出现的基础知识，而且能提高自学能力，开发智力，从阅读中得到乐趣。 （3）开设写作课。针对学生英文写作能力差，中国式英语句子在书面表达屡见不鲜的状况，可充分利用我校现有的电脑软件，根据新教材写作要求，循序渐进地对学生进行写作训练。 “英语书面表达与训练”，将应用文，描写文，说明文和论述进行有目的，分层次的指导训练。开设写作课不仅仅是单纯为高考的书面表达做准备，也是让学生学会各种英语文体的写作方法与技巧，适应未来社会对外语人才的要求。 （4）实施英语分层次教学，开设英语成功课与提高课。学生可以根据自己的实际英语水平，自由挑选上成功课还是提高课。教师采取挂牌上课。基础较差的学生可以在成功课里弥补知识的缺陷，抓好双基落实，开发自己的非智力因素，促进成绩的提高，享受成功的喜悦。基础较好的学生可以参加提高班的较高水平的英语综合训练，促使自己的英语水平向“高，精，尖”发展，提前完成大纲任务并为竞赛作好准备。
一、引言
文化，这两种孕育自不同半球的文化，由于历史、地理环境、生产制度等方面的原因，有着极大的差异，截然不同的特色。这两种文化差异，一直备受关注。随着全球化的到来，全世界各民族间商业交流往来的日益频繁，了解中西方文化价值差异可以更好促进民族间经济、文化交流与沟通，从而避免所引起的不必要的误会和麻烦，导致的文化休克（culture shock）或交际失败（communication failure）。而语言是文化的载体，是文化的一部分，很大程度上反映了文化。谚语作为“民族文化之明镜”，来自于生活，更深刻地反映了民族文化特色，体现了人们的生产生活、思想观念、文化取向，具有持久的生命力、广泛的通俗性、生动的口语化的特点。英国著名学者培根曾说过：“The genius, wit and spirit of a nation are discovered in its proverbs.”（一个民族的天才、智慧和精神，都可以在其谚语中发现。）本文将从汉英谚语入手谈谈中西文化在地理环境、宗教信仰、历史、文学传统、民族性格、思想观念等方面的差异。
二、 地理环境
文化是在一定的自然环境里生发出来的。人们所生存的不同环境势必影响人
们的生活、生产方式，影响人们对客观外界的观察与思考。人们以通俗形象的语言来讲述自己的生活体验，描述自然现象，总结生产实践，概括生产经验。这些语言口口相传，千锤百炼，成为大家喜闻乐诵的谚语。这些谚语必然反映出自然环境的不同特征，带有鲜明的地域文化和生态文化的色彩。
英国是个岛国，四面环海，海岸线曲折多变，港湾楔入，岛屿众多。这样的自然环境给英国人提供了舟楫之便。人们在长期的航运渔业生活中，创造出数以百计的英语谚语，反映他们对生活及大自然的体验和观察。如：
There’s as good fish in the sea as ever come out of it.有了大海，还怕没鱼。
No fishing like fishing in the sea.捕鱼要到大海。
Who will not be ruled by the rudder must be ruled by the rock.船离舵，要闯祸。
A dog in the morning,sailors take warning; a dog in the night is the sailors’ delight.朝虹出天际，水手心事重，夜间见彩虹，水手乐哈哈。
He goes a great voyage that goes to bottom of the sea.到达海底的人，才算做了一次远航。
特殊的地理环境形成了特有的岛国气候。英国气候潮湿，天气变化大，岛上晴天少，雨天多，且多阵雨，因此，英国人出门常带把雨伞。由于英国天气变化无常的缘故，英国人非常关心天气，也喜欢谈论天气，并因此而产生了许多关于天气的谚语[1](P85)：
April weather, rain and shine both together.一边日出一边雨，晴雨无常四月天。
An English summer, three(or two)hot days and a thunderstorm.英国的一个夏季，三（两）个热天一阵大雷雨。
A misty morning may have a fine day.早晨有雾露，可能是晴天。
When the wind’s in the west, the weather’s at the best.风从西方起，天气最佳丽。
而处于另一个半球的中国则有着不同的地理自然风貌，中华文明发源于长江黄河流域，中国自古是典型的农耕社会，人们过着自给自足的农耕生活，农业是国民经济的重要支柱，农业在历代政府中都受到极大的重视。因此产生了许多与农业相关的谚语。
如：庄稼百样巧，地是无价宝。
人勤地不懒，勤奋谷仓满。
田里无神无鬼，全靠肥料土水。
庄稼老汉不知闲，放下锄头拿扁担。
农夫不种田，城里断炊烟。
田像一块铁，在于人来打。[2]（P240-241）
我国的天气谚语，从量上、质上，以及悠久的历史传统上，值得称道。如“灶烟往下埋，不久雨就来”、“春天孩儿脸，一日变三变”、“太阳颜色黄，明日大风狂”、“久晴大雾必阴，久雨大雾必晴”、“夜里星光明，明朝仍旧晴”等等。[1]（P85）
三、 特定历史
每个民族都以不同的方式在人类历史的画卷中写着自己特定的历史。从谚语中可以一窥历史风云变化。英国从十六世纪开始发展资本主义，经济迅速发展并逐渐开始迅速向海外扩张，掠夺资本主义原料，进行资本主义的原始积累。
Shoe-maker’s wife goes bare feet.这句谚语正是出自于十六世纪资本主义新兴时期，小资本家拼命发家致富，属于手工业者的鞋匠们为积攒钱财，竟然连给妻子买鞋穿的钱都不舍得花。十七世纪起英国在东印度扩张，十八世纪中叶建立殖民统治。He came safe from the East –India, and was drowned in the Thames.他从东印度安然归来，却淹死于泰晤士河。[3]（P79）英国历史上曾遭到多次其他国家的入侵。罗马统治期间，社会生活罗马化，拉丁语是官方、法律、商业和法律用语。丹麦人侵占期间，丹麦语也传入英国。1066年法国诺曼底登陆后，英国为法国所征服。 法语很长时期成为英国的官方语言，贵族、朝臣、地主和上流社会都使用法语，如当时的英国国王爱德华是完全不会说英语的国王，因此有英谚云：Jack would be a gentleman if he could speak French.要是杰克能讲法语，那他就是个绅士了。而三种语言交配混合到英语中，充实了英语语言，也带来了许多拉丁语、法语谚语。[1]（P84）
Anger is a short madness .愤怒是短暂的疯狂。（拉丁语）
Art is long, life is short. 艺术是无限，生命是有限的。（拉丁语）
All roads leads to Rome. 条条大路通罗马。（法语）
He that is afraid of asking is ashamed of learning. 怕问者耻于学。（丹麦语）
而在中国的历史长河中，秦始皇于公元前221年统一中国，从此中国进入了漫长的封建社会。广大劳动人民深受压迫和剥削，生活于水深火热之中，而统治阶级却过着穷奢极欲的生活。[4]（P50）有许多汉谚就反映了这一点。
In the 20th century, bridge construction technology evolved and was fueled by the
Industrial Revolution. At the turn of the century, steel bridges were riveted together, not
bolted; concrete bridges were cast in place, not precast; and large bridge members were
built from lacing bars and smaller sections, not rolled in one piece. Plastic had not yet been
invented. Construction techniques such as post-tensioning, slurry walls, soil freezing, and
reinforced earth walls had not yet been conceived. Surveying was performed mechanically
since infrared, optical technology was still 75 years away.
Bridge construction is changing as the new millennium begins. New construction
techniques and new materials are emerging. There are also new issues facing the bridge
building industry relative to the research needs associated with these new techniques and
materials.
LONG-SPAN BRIDGES
Suspension Bridges
While suspension bridge building was conducted at a modest pace throughout the 20th
century, an unprecedented number of spans of remarkable record lengths were built in the
Far East and Denmark. Both the Akashi Kaikyo Bridge in Japan and the Great Belt Bridge
in Denmark were completed in 1998. The Akashi Kaikyo Bridge is the largest suspension
bridge in the world, with a span of 1991 m, and the Great Belt Bridge is the second largest,
with a span of 1624 m.
While spans lengths have increased nearly fivefold during the course of this century,
they may have reached their physical limits with today’s materials. Research will be
necessary to develop the new, ultra-high-strength steel wire or carbon fiber wire required to
build the longer main suspension cables that will make it possible to increase span lengths to
beyond 2000 m.
As we enter the new millennium, rehabilitation and ongoing maintenance of the existing
suspension bridges must continue as well. Recent rehabilitation measures for the main
cables and suspension systems of these bridges have uncovered degradation through
corrosion and hydrogen embrittlement. Research is needed to determine the remaining
useful service life of suspension bridge cables and what measures can be taken to slow or
halt the degradation process.
Transportation in the New Millennium 2
Other components of long-span bridges, existing and new, are being revolutionized as
technology moves forward. Advances in deck technology are producing stronger, lighter
decks. Orthotropic and exodermic decks are becoming increasingly popular on long-span
structures as a means of reducing dead load. Bearings, joint systems, and seismic retrofitting
components are becoming increasingly efficient as more large-scale testing facilities are
built.
在20世纪,桥梁施工技术,是由进化而来的
工业革命。随着新世纪的到来,钢桥受到铆接在一起,而不是
螺栓、混凝土桥梁被扔在的地方,不是预制、大型桥梁成员
从系酒吧和小的部分,不卷在一块。塑料尚未
发明了。制作等施工工艺、浆墙、土壤冻结,
加筋土墙尚未怀了孕。测量进行机械
自从红外、光学技术仍然是75年。
大桥建设是新千年开始转变。新建筑
技术和新材料正在浮出水面。也有新的解决面临的桥
建筑行业的相关研究的需要,这些新技术
材料。
大跨度桥梁
悬挂的桥梁
虽然悬索桥建设进行了整个20速度不快
世纪,前所未有的跨越了卓越的长度是建在记录
远东和丹麦。双方在日本明石海峡大桥正式通车,伟大的带桥
在丹麦是在一九九八年完成。这个明石海峡大桥正式通车是世界上最大的悬架
在这个世界上,与桥梁的m,1991年是中国的第二大带桥,
用一段1624)。
虽然已经增加了近5倍长度的跨世纪的过程中,
他们已经达到了他们的物理极限与今天的材料。研究将
必须发展新的、ultra-high-strength钢丝、碳纤维丝要求
建立了悬索,将不再主要可能增加到跨度的长度
超出2000米。
当我们进入新千年、康复和持续的维护现有的
悬索桥必须继续。最近的戒毒措施为主要
电缆悬架系统与这些桥梁发现退化
氢脆腐蚀,。研究还剩下的
寿命悬索桥电缆和什么措施可以减缓或
停止退化的过程。
在新千年的运输
其他组件的大跨度桥梁,现有的和新的,正在发生了革命性的变化
技术的进步。提出了在甲板上技术生产强的,更轻的
甲板。正交各向异性和exodermic牌是大跨度越来越受欢迎
作为一种手段,降低结构自重荷载。轴承、联合系统和抗震能力
越来越多的有效成分是更大规模的测试设备
建造。
50分！！~~谢谢
参考资料：我的大脑
