- 摘 要
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（1 河北大學(xué)建筑工程學(xué)院， 保定 071002； 2 河北建設(shè)集團(tuán)股份有限公司， 保定 071052；3太原理工大學(xué)土木工程學(xué)院， 太原 030024）
［摘要］以河北北方學(xué)院體育館弦支穹頂屋蓋為研究對象，考慮幾何和材料非線性、活載布置方式及初始幾何缺陷分布模式和大小等因素，對結(jié)構(gòu)進(jìn)行特征值屈曲和非線性屈曲的荷載-位移平衡路徑全過程分析。研究表明：半跨活載布置對穩(wěn)定承載力無不利影響，恒載及活載全跨布置、初始幾何缺陷按第2階屈曲模態(tài)分布時(shí)，結(jié)構(gòu)穩(wěn)定承載力最小。活載布置方式影響結(jié)構(gòu)屈曲位移形態(tài)，活載全跨布置時(shí)局部凹陷區(qū)域?yàn)檠囟梯S跨度方向呈不對稱形式分布，活載半跨布置時(shí)局部凹陷均位于活載最不利布置一側(cè)呈帶狀分布。弦支穹頂結(jié)構(gòu)對初始幾何缺陷的變化比較敏感，結(jié)構(gòu)由無缺陷到缺陷增加至跨度的1/100過程中，荷載-位移曲線平衡路徑出現(xiàn)兩種不同的模式。
［關(guān)鍵詞］弦支穹頂結(jié)構(gòu)； 特征值屈曲； 材料非線性； 初始幾何缺陷
中圖分類號：TU393-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)05-0082-06
Stability analysis on the suspend-dome structure roof of Hebei North University gymnasium
Liu Jing1, Zhao Ruoxu1, Chen Zongxue2, Li Haiwang3, Qie Luwen1
(1 College of Civil Engineering and Architecture, Hebei University, Baoding 071002, China;2 Hebei Construction Group Corporation Limited, Baoding 071052, China;3 College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
Abstract:The suspend-dome structure roof of Hebei North University gymnasium was taken as the research object, considering geometric and material nonlinearity, live load arrangement and initial geometric defect distribution mode and size, and the full process analysis was conducted on the load displacement equilibrium path for eigenvalue buckling and nonlinear buckling of the structure. The results show that the arrangement of half-span live load has no adverse effect on the bearing capacity of stability. When the arrangement of dead load and full span live load and the initial geometric imperfection are distributed according to the second order buckling mode, the stability of bearing capacity of the structure is the smallest. The layout of live load affects the form of structural buckling displacement. When the whole span of live load is arranged, the local depressions are distributed asymmetrically along the direction of the short axis span. When the half-span of live load is arranged, the local depressions are all located on the side of the most unfavorable layout of live load and distributed in a strip. The suspend-dome structure is more sensitive to the change of the initial geometric defect. During the process of the structure changing from defect-free to defect increasing to 1/100 of the span, two different modes of the load-displacement curve equilibrium path appear.
Keywords:suspend-dome structure; eigenvalue buckling; material nonlinearity; initial geometric defect
*河北省自然科學(xué)基金（E2017201158），河北省高等學(xué)校科學(xué)技術(shù)研究項(xiàng)目（QN2016171），2016年“一省一校”專項(xiàng)經(jīng)費(fèi)，河北大學(xué)研究生創(chuàng)新資助項(xiàng)目(hbu2019ss017)。
作者簡介：劉靜，博士，講師，Email:cimeng2005@163.com。
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