开孔对薄壁圆柱壳结构抗风稳定性的影响研究  

Study on influence of openings on wind stability of thin-walled cylindrical shell structures

作　　者：程爱平[1] 梅钊 王平[1] 吴金池 CHENG Aiping;MEI Zhao;WANG Ping;WU Jinchi(School of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Industrial Construction Group Co.,Ltd.,Wuhan 430076,China)

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081 [2]湖北省工业建筑集团有限公司,武汉430076

出　　处：《建筑结构》2025年第1期34-41,共8页Building Structure

基　　金：国家自然科学基金项目(51604195);湖北省自然科学基金项目(2018CFC818)。

摘　　要：以某脱硫塔为研究对象,将其简化为开孔薄壁圆柱壳结构,采用有限元软件ANSYS建立了未开孔与不同开孔薄壁圆柱壳结构模型。对比分析了不同开口参数下薄壁圆柱壳结构的风致屈曲特性,探讨了开孔高度、开孔角度和开孔半径对薄壁圆柱壳结构抗风稳定性的影响规律。研究结果表明:开孔角度对于结构抗风稳定性的影响最大,当开孔角度小于120°时,结构抗风极限承载力下降趋势较为明显,当开孔角度大于120°时,降幅趋于缓和;开孔高度对结构抗风稳定性的影响规律较为明显,随着开孔高度的增大,结构抗风极限承载力先减小后增大;薄壁圆柱壳结构在风荷载作用下存在两处不利开孔区域,分别为迎风线两侧α=0°~75°、h=0~0.8H和α=75°~120°、h=0~0.5H处;在不利开孔区域开孔时,随着开孔半径的增大,结构抗风极限承载力逐渐减小,基本呈线性关系,在不利开孔区域以外开孔时,随着开孔半径的增大,结构抗风极限承载力的变化不明显。Taking a desulfurization tower as the research object,it is simplified as a thin-walled cylindrical shell structure with openings,the structural models of the thin-walled cylindrical shell without openings and with different openings were established by using the finite element software ANSYS.The wind-induced buckling characteristics of the thin-walled cylindrical shell structure with different opening parameters were compared and analyzed,and the effects of the opening height,opening angle and opening radius on the wind stability of the thin-walled cylindrical shell structure were discussed.The results show that the opening angle has the greatest influence on the wind stability of the structure,when the opening angle is less than 120°,the decline trend of the wind ultimate load-bearing capacity of the structure is obvious,and when the opening angle is greater than 120°,the decline tends to moderate.The influence of the opening height on the wind stability of the structure is obvious,with the increase of the opening height,the wind ultimate load-bearing capacity of the structure decreases first and then increases.The thin-walled cylindrical shell structure has two unfavorable opening areas under wind load,which are on both sides of the windward line α=0°~75°,h=0~0.8H and α=75°~120°,h=0~0.5H.When opening in the unfavorable opening area,with the increase of the opening radius,the wind ultimate load-bearing capacity of the structure gradually decreases,basically showing a linear relationship.When opening outside the unfavorable opening area,with the increase of the opening radius,the change of the wind ultimate load-bearing capacity of the structure is not obvious.

关 键 词：薄壁圆柱壳 开孔参数 抗风稳定性 有限元分析 屈曲特性 

分 类 号：TU333[建筑科学—结构工程]