- 摘 要
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(中信建筑設(shè)計研究總院有限公司， 武漢 430000)
［摘要］以某圖書館的錐形穹頂單層網(wǎng)殼為研究對象，分析其受力變形性能和整體穩(wěn)定性能。對比研究了不同截面方案和節(jié)點假定對網(wǎng)殼構(gòu)件承載力、屈曲特性和極限承載力的影響。采用多尺度有限元分析方法，真實模擬節(jié)點性能，與節(jié)點剛接、鉸接模型的計算結(jié)果進行了對比。結(jié)果表明：采用鋼管非加勁相貫焊連接的單層網(wǎng)殼為典型的半剛接網(wǎng)殼，合理的桿件截面設(shè)計可使其整體穩(wěn)定性能接近于節(jié)點剛接模型；節(jié)點鉸接會改變單層網(wǎng)殼的屈曲形態(tài)，使結(jié)構(gòu)整體協(xié)同性能嚴(yán)重弱化或喪失；多尺度有限元分析方法是判別節(jié)點剛度和承載力的有效方法，可真實反映節(jié)點性能對整體結(jié)構(gòu)性能的影響。
［關(guān)鍵詞］錐形穹頂；單層網(wǎng)殼；半剛接；鋼管相貫節(jié)點；穩(wěn)定性；多尺度有限元法
中圖分類號：TU391 文獻標(biāo)識碼：A文章編號：1002-848X(2021)14-0045-06
Analysis and design of the semi-rigid single-lager reticulated shell of a conical vault
HE Xiaohui, WEN Siqing, WANG Xin, DONG Weiguo
(CITIC General Institute of Architectural Design and Research Co., Ltd., Wuhan 430000， China)
Abstract:Taking the conical vault of a library as the example, which fabricated by single-layer reticulated shell, its mechanical deformation and overall stability were analyzed. The effects of different section schemes and joint assumptions on the member bearing capacity, buckling characteristics and ultimate bearing capacity of reticulated shells were studied. The multi-scale finite element analysis method was used to simulate the real performance of the joints, the results from which were compared with the ones from the rigid model and pinned model. The results show that the single-layer reticulated shell connected by directed welded tubular joints is a typical semi-rigid reticulated shell, and its overall stability can close to that of the rigid model through reasonable section design. The hinged joints will change the buckling mode of the single-layer reticulated shell and make the overall coordination performance of the structure seriously weaken or lost. Multi-scale finite element analysis method is an effective method to identify the stiffness and bearing capacity of joints, and it can truly reflect the influence on the performance of the whole structure due to the real behavior of joints.
Keywords:conical vault； single-layer reticulated shell； semi-rigid joint； directed welded tubular joint； stability； multi-scale finite element method
作者簡介：何小輝，博士，高級工程師，Email：netboyhxh@163.com。
