外文翻譯---使用高級分析法的鋼框架創(chuàng)新設(shè)計-其他專業(yè)-資料下載頁
2025-01-19 09:20本頁面
【導(dǎo)讀】在允許應(yīng)力設(shè)計中，應(yīng)力計算基于一階彈性分析，而幾何非。線性影響則隱含在細(xì)部設(shè)計方程中。高產(chǎn)效應(yīng)并不在塑性設(shè)計之中，但它們近似細(xì)部設(shè)計方程。在荷載和阻力系數(shù)設(shè)。計中，含放大系數(shù)的一階彈性分析或單純的二階彈性分析被用于幾何非線性分析，而梁柱的極限強(qiáng)度隱藏在互動設(shè)計方程。所有三個設(shè)計方法需要獨立進(jìn)行檢查，在下面，對荷載抗力系數(shù)設(shè)計法的特點進(jìn)行了簡要介紹。在目前的實際應(yīng)用中，結(jié)構(gòu)體系和它。構(gòu)件的相互影響反映在有效長度這一因素上。嚴(yán)格考慮這種相互依存關(guān)系，很多結(jié)構(gòu)是不實際的。因此，社會科學(xué)研究委員會建議在實際設(shè)計中，這兩方。面應(yīng)單獨考慮單獨構(gòu)件的穩(wěn)定性和結(jié)構(gòu)的基礎(chǔ)及結(jié)構(gòu)整體穩(wěn)定性。憑借目前現(xiàn)有的計算技術(shù)，直接使用高級分析法技術(shù)框架。地完成框架設(shè)計方法提供給工程師，但這要符合荷載抗力系數(shù)規(guī)范。范允許通過“合理途徑”連接靈活性評估。
【正文】 of analysis/design based on exact plasticzone solutions and LRFD designs. The wide range of case studies and parisons should confirm the validity of this advanced method. 2． Practical Advanced Analysis This section presents a practical advanced analysis method for the direct design of steel frames by eliminating 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.
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