ALTERNATIVE APPROACHES FOR ELASTIC ANALYSIS AND DESIGN OF STEEL FRAMES. I: OVERVIEW
ALTERNATIVE APPROACHES FOR ELASTIC ANALYSIS AND DESIGN OF STEEL FRAMES. I: OVERVIEW
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钢框架弹性分析和设计的替代方法。
DOI：
10.1061/(asce)0733-9445(2004)130:8(1186
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
D. White
中科院分区：
文献类型：
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作者：
Andrea E. Surovek;D. White
概述了两种分析和设计钢框架系统的方法，并与当前美国钢结构协会（AISC）荷载和阻力系数设计（LRFD）屈曲解或基于有效长度的方法进行了比较：基于AISC LRFD的概念荷载方法和改进的弹性方法。这两种方法都提供了一种合理的方法来解释影响系统强度的关键现象，特别是残余应力（即构件非弹性）和初始几何缺陷。通过在二阶弹性分析中直接考虑这些因素，消除了对有效长度因素或屈曲解的需要。此外，这些方法比目前的方法更准确地估计所需的内部系统力。给出了稳定性临界工业型框架的解决方案示例，以说明这些方法的应用，并将其结果与当前AISC LRFD程序和严格的分布式塑性分析的解决方案进行比较和对比。
Two methods for analysis and design of steel framing systems are outlined and compared to the current American Institute of Steel Construction (AISC) load and resistance factor design (LRFD) buckling solution or effective length based procedure: an AISC LRFD based notional load approach and a modified elastic approach. Both methods provide a rational means of accounting for the key phenomena that affect system strength, specifically residual stresses (i.e., member inelasticity) and initial geometric imperfections. By accounting for these factors directly within a second-order elastic analysis, the need for effective length factors or buckling solutions is eliminated. Also, these methods provide a more accurate estimate of required internal system forces than current methods. Examples of solutions for a stability critical industrial-type frame are presented to illustrate the application of these methods, and to compare and contrast their results with solutions from both the current AISC LRFD procedures and from rigorous distributed plasticity analysis.