外文翻譯---使用高級(jí)分析法的鋼框架創(chuàng)新設(shè)計(jì)-其他專業(yè)-在線瀏覽
2025-03-24 09:20本頁面
【正文】 iminating separate member capacity checks by the specification. The refined plastic hinge method was developed and refined by simply modifying the conventional elasticplastic hinge method to achieve both simplicity and a realistic representation of actual behavior [15, 25]. Verification of the method will be given in the next section to provide final confirmation of the validity of the method. Connection flexibility can be accounted for in advanced analysis. Conventional analysis and design of steel structures are usually carried out under the assumption that beamtocolumn connections are either fully rigid or ideally pinned. However, most connections in practice are semirigid and their behavior lies between these two extreme cases. In the AISCLRFD specification [2], two types of construction are designated: Type FR (fully restrained) construction and Type PR (partially restrained) construction. The LRFD specification permits the evaluation of the flexibility of connections by “rational means”. Connection behavior is represented by its momentrotation relationship. Extensive experimental work on connections has been performed, and a large body of momentrotation data collected. With this data base, researchers have developed several connection models, including linear, polynomial, Bspline, power, and exponential. Herein, the threeparameter power model proposed by Kishi and Chen [21] is adopted. Geometric imperfections should be modeled in frame members when using advanced analysis. Geometric imperfections result from unavoidable error during fabrication or erection. For structural members in building frames, the types of geometric imperfections are outofstraightness and outofplumbness. Explicit modeling and equivalent notional loads have been used to account for geometric imperfections by previous researchers. In this section, a new method based on further reduction of the tangent stiffness of members is developed [15, 16]. This method provides a simple means to account for the effect of imperfection without inputting notional loads or explicit geometric imperfections. The practical advanced analysis method described in this section is limited to twodimensional braced, unbraced, and semirigid frames subject to static loads. The spatial behavior of frames is not considered, and lateral torsional buckling is assumed to be prevented by adequate lateral bracing. A pact W section is assumed so sections can develop full plastic moment capacity without local buckling. Both strong and weakaxis bending of wide flange sections have been studied using the practical advanced analysis method [15]. The method may be considered an interim analysis/design procedure between the conventional LRFD method widely used now and a more rigorous advanced analysis/design method such as the plasticzone method to be developed in the future for practical use. 。強(qiáng)軸和弱軸彎曲寬凸緣部分的研究都采用 高級(jí) 實(shí)用性分析方法。不考慮結(jié)構(gòu)的空間狀態(tài)，并且假定有足夠的側(cè)向支撐防止側(cè)扭屈曲。這種方法提供了一 種簡(jiǎn)易的途徑用來證明沒有輸入名義載荷或明確幾何缺陷的不完善的影響。明確建模和等效名義載荷被研究人員用來證明幾何缺陷。幾何缺陷在構(gòu)造或架設(shè)過程中導(dǎo)致不可避免的錯(cuò)誤。鑒于此， Kishi 和 Chen 提出的三參數(shù)冪函數(shù)模型被采用了。 瞬間旋轉(zhuǎn)的關(guān)系代表了連接的狀態(tài)，已經(jīng)完成多方面的試點(diǎn)連接工作和收集大批的瞬時(shí)旋轉(zhuǎn)數(shù)據(jù)。在允許應(yīng)力設(shè)計(jì) 荷載抗力系數(shù)規(guī)范，有兩類特定的建筑： FR（完全受限）結(jié)構(gòu)和 PR（部分受限）結(jié)構(gòu)。常規(guī)分析和鋼結(jié)構(gòu)的設(shè)計(jì)通
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