- 摘 要
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（1 中衡設計集團股份有限公司， 蘇州 215021;2 江蘇省生態(tài)建筑與復雜結構工程技術研究中心， 蘇州 215021）
［摘要］蘇州絲綢博物館“四方雨”景觀鋼結構由12根直徑105mm的圓鋼立柱及菱形扁鋼梁格組成，梁格下掛直徑25mm的鋁合金圓管。采用CFX-FLO軟件對“四方雨”景觀鋼結構進行了數(shù)值風洞模擬，結果表明圓管立柱之間風荷載相互影響較小，風荷載體型系數(shù)接近1-0。對于扁鋼梁，基于第1階屈曲模態(tài)，對有限元模型引入初始幾何缺陷，在計算中考慮雙非線性，結果表明扁鋼梁整體穩(wěn)定系數(shù)僅為0-2，其設計滿足規(guī)范要求。基于NIDA軟件采用二階直接分析方法，并考慮結構整體缺陷和構件缺陷，在計算中考慮雙非線性，分析結果表明鋼結構設計滿足規(guī)范要求，結構的失穩(wěn)形態(tài)和破壞機制符合預期目標。
［關鍵詞］數(shù)值風洞模擬； 屈曲分析； 二階直接分析； NIDA； 穩(wěn)定極限承載力
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2019)01-0054-06
Analysis and design of ″Squared Rain″ steel structure in Suzhou Silk Museum
Lu Jianglong1,2, Yang Cheng1, Yang Lülei1,2, Shen Xiaoming1,2
(1 ARTS Group Co., Ltd., Suzhou 215021, China;2 Jiangsu Engineering Institute of Ecological Building & Complex Structure, Suzhou 215021, China)
Abstract: The ″Squared Rain″ landscape steel structure in Suzhou Silk Museum consists of 12 round steel columns with the diameter of 105mm and diamond-shaped flat steel beams. The aluminum alloy round pipes with the diameter of 25mm are hung under the beams. The numerical wind tunnel simulation was carried out on the ″Squared Rain″ landscape steel structure by CFX-FLO software. The results show that the wind loads between the round pipe columns have little influence on each other, and the wind load shape coefficient closes to be 1.0. For flat steel beams, based on the first-order buckling mode, the initial geometric imperfections were introduced into the finite element model, and the double nonlinearity was considered in the calculation. The results show that the overall stability factor of flat steel beams is only 0.2, and its design meets the requirements of the code. Based on the NIDA software, the second-order direct analysis method was adopted, and the overall structural defects and component defects were taken into account. The double nonlinearity was considered in the calculation. The analysis results show that the design of steel structure meets the requirements of the code, and the instability form and failure mechanism of the structure meet the expected objectives.
Keywords:numerical wind tunnel simulation; buckling analysis; second-order direct analysis; NIDA; stability ultimate bearing capacity
作者簡介：路江龍，碩士，高級工程師，一級注冊結構工程師，英國注冊結構工程師，Email：lujianglong@artsgroup.cn。
