- 摘 要
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(北京市建筑設計研究院有限公司， 北京 100045)
［摘要］以某實際工程為例，介紹了應用直接分析法進行異形鋼結構設計的步驟及方法。提出一種新的適用于曲線受壓構件的分布式屈曲初始單位力施加方式對本例進行線性屈曲分析，確定本例異形受壓格構柱的計算長度系數(shù)。將直接分析法的結果與傳統(tǒng)計算長度系數(shù)法進行對比，驗證了直接分析法在此類鋼結構設計中的適用性?？偨Y了直接分析法應用在異形鋼結構設計中的優(yōu)點，并指出了該法現(xiàn)階段在確定構件最不利內力時，尚存在的不足。
［關鍵詞］異形鋼結構；直接分析法；計算長度系數(shù)法；初始缺陷；非線性分析
中圖分類號：TU311, TU391 文獻標識碼：A文章編號：1002-848X(2021)19-0121-05
Application of direct analysis method in designing irregular shaped steel structures and its comparison to effective length factor method
GAO Ming, TIAN Jin
(Beijing Institute of Architectural Design, Beijing 100045， China)
Abstract: Taking a practical project as an example, the steps and methods of applying direct analysis method in designing irregular shaped steel structures were introduced. A new distributed initial unit force method in linear buckling analysis for curve-compressed members was proposed to calculate the effective length factors of the irregular shaped latticed columns in this case. The results of direct analysis method and effective length factor method were compared, which verifies the applicability of direct analysis method in the design of this type of steel structures. The advantages of direct analysis method in the design of irregular shaped steel structures were summarized and the imperfection in determine the most dangerous internal forces for structural members of the method was discussed.
Keywords:irregular shaped steel structure； direct analysis method； effective length factor method； initial defect； nonlinear analysis
作者簡介：高鳴，碩士，高級工程師，一級注冊結構工程師，Email：gaomingbj@163.com。
