外文翻譯---通過建筑結(jié)構(gòu)設(shè)計以改善建筑物的抗倒性-預(yù)覽頁
【正文】 response for a single beam 中文翻譯2通過建筑結(jié)構(gòu)設(shè)計以改善建筑物的抗倒性D A Nethercota 土木與環(huán)境工程學(xué)院——倫敦帝國學(xué)院摘 要：如今的“新話題”出現(xiàn)在相對成熟的結(jié)構(gòu)工程領(lǐng)域這是一件罕見的事。 Nethercot et al 2010b) have suggested that tying capacity correlates poorly with actual resistance to progressive collapse. Moreover, being prescriptive, it does not permit the meaningful parison of alternative arrangements a fundamental feature of structural design. In its most frequently used form the alternative load path approach presumes the instantaneous loss of a single column and then requires that the ability of the resulting damaged structure to bridge the loss be demonstrated by suitable calculation (Gudmundsson and Izzuddin 2010). The approach may be implemented at varying levels of sophistication in terms of the analysis。 Robustness。 Progressive Collapse。 the actual values required are normally related to the vertical loading. Figure 1, which is taken from recent US Guidance (SEI 2010), illustrates the principle. The approach is simple to appreciate, requires minimal structural calculation and, in situations where the original provisions are found to be inadequate, can be made to work by providing more substantial connections and/or additional reinforcement in floor slabs In an interesting recent development, that recognizes the link to the generation of catenary action, US Guidance has restricted the use of tying between the structural members to situations in which it can be demonstrated that the associated connections can carry the required forces whilst undergoing rotations of radiance. Where this is not possible, tying should act through the floors and the roof. However, recent studies (Nethercot et al 2010a。 where these require putations beyond “hand methods”, these should be based on the use of available analysis software.*c A realistic and recognisable criterion of failure should be used.*c Approach should permit study of cause and effect and be suitable for the making of quantitative parisons. It was against this background that the studies at Imperial College London have been undertaken. An approach incorporating the three essential features but observing the five desirable features was originally developed (Vlassis 2007)。最近的工作是當(dāng)時的報道，集中精力在過去7年在倫敦大學(xué)帝國學(xué)院的發(fā)展，在一個能使用各種水平和由設(shè)計師一直在發(fā)展適合直接使用的綜合方法。*c 加強(qiáng)能力從工藝為基礎(chǔ)的移動科學(xué)依據(jù)從而從規(guī)范的定量合理的方法。論題的處理比如疲勞，耐火性，耐久性和適用性都可以被看作是這個模式。在羅南點于1968年在倫敦坍塌之前，魯棒性原則，抗連續(xù)性倒塌，非比例破壞等是不屬于工程詞匯里的。然后，結(jié)構(gòu)設(shè)計指導(dǎo)在當(dāng)時產(chǎn)生——仍然決定了很多現(xiàn)在的條款——是自然本質(zhì)上的處方式,沒有真正的鏈接到實際的性能。本文將回顧當(dāng)前用來設(shè)計抵制連續(xù)倒塌的方法和對比過去七年在倫敦大學(xué)帝國理工學(xué)院進(jìn)行的這些工作，那里的目標(biāo)是提供一個依據(jù)于實際方法適合用在常規(guī)設(shè)計。這個方法對于觀察是簡單的，只需要很少的結(jié)構(gòu)計算和在最初的規(guī)定被發(fā)現(xiàn)是不充分的的情況下，能通過提供更多的實質(zhì)性的連接或在一個有趣的近代發(fā)展中水泥樓板中施加額外加固，認(rèn)識到鏈?zhǔn)椒磻?yīng)的連接的生成，US 。此外，它被規(guī)范不允許有意義的替代安排的比較——結(jié)構(gòu)設(shè)計的一個基本特征。三個特征已經(jīng)預(yù)先被鑒證出作為任何合理的現(xiàn)實的方法去設(shè)計對抗連續(xù)倒塌的必要部分：*c 事件發(fā)生在非常短的時間段內(nèi)和正在的失敗是因此動態(tài)。*c 任何必需的驗定都應(yīng)該利用熟悉的技術(shù)；這里需要的計算多于“手工”，是基于可用的分析軟件的使用的計算。一個結(jié)合了三個基本特征但是觀察五個理想功能的方法最初被開發(fā)（Vlassis 2007）；它后來被開發(fā)的跟精確（Stylianidis 2010）。*c 該方法可以實現(xiàn)只使用顯式公式，從而允許簡單和快速計算。 2007, Vol. 160. No. SB4 pp. 197206. [3] Izzuddin BA, Vlassis AG, Elghazouli AY, and Nethercot DA. Progressive Collapse of MultiStorey Buildings due to Sudden Column Loss Part I Simplified Assessment Framework, Engineering Structures。 2010, 7 – 10 Sept, pp. 515. [7] Nethercot DA, Stylianidis P, Izzuddin BA, and Elghazouli AY. Enhancing the Robustness of Steel and Composite Buildings, ICASS’09 Hong Kong。 2010b [10] SEI Disproportionate Collapse Standards and Guidance Committee. Design Procedures, Draft Committee Document。 2007
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