考虑弯矩作用梭形格构柱稳定承载力实用算法研究
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(浙江大学建筑设计研究院, 杭州310028)[摘要]以大型通用软件ANSYS为平台,研究以轴力为主、同时考虑弯矩作用的梭形格构柱的稳定承载能力。通过对不同高度和长细比的梭形格构柱进行非线性稳定计算和参数分析,提出了梭形格构柱稳定承载力的实用计算方法:以弹性特征值为基础计算梭形格构柱的等效长细比,并利用弯矩系数对等效长细比进行修正,得到修正长细比后即可通过查表的方式得到梭形格构柱稳定承载力。[关键词]梭形格构柱; 非线性; 稳定承载力; 实用计算方法; 修正长细比中图分类号:TU391文献标识码:A文章编号:1002-848X(2013)15-0063-05Practical calculation method of stability bearing capacity of shuttle-shaped steel lattice columns with bending momentTian Wei, Gan Gang(Architectural Design and Research Institute of Zhejiang University, Hangzhou 310028, China)Abstract: The stability bearing capacity of shuttle-shaped steel lattice columns subject to combined axial force and bending moment is explored through general software ANSYS. Through nonlinear stability analysis and parameter analysis of shuttle-shaped steel lattice columns with various heights and slenderness ratios, a practical calculation method is proposed to calculate stability bearing capacity of shuttle-shaped steel lattice columns with bending moment: equal slenderness ratio based on elastic buckling eigenvalues is present; moment ratio is then proposed to modify slenderness ratio, and the ratio can be used to get the stability bearing capacity of shuttle-shaped steel lattice columns through tables.Keywords: Shuttle-shaped steel lattice columns; nonlinear; stability bearing capacity; practical calculation method; modified slenderness ratio作者简介:田伟,工学博士,工程师,Email: vannytian@163.com。参考文献[1]WANG D S, GAO C, ZHANG W Y, et al. A brief introduction on structural design of cable-membrane roof and sun valley steel structure for Expo Axis project [J]. Spatial Structures, 2009, 15(1): 89-96.[2]兰勇,郭彦林,陈国栋.梭形钢格构柱弹性屈曲性能[J]. 建筑结构学报,2002, 23(5): 18-24.[3]郭彦林,陈国栋,兰勇.三管梭形钢格构柱稳定极限承载力研究[J].建筑结构学报,2002,23(5): 25-30.[4]兰勇,郭彦林,刘涛,等.三管梭形钢格构柱缩尺模型破坏性稳定试验研究[J].建筑结构学报,2002, 23(5): 41-48.[5]郭彦林,兰勇,高玉峰,等.三管梭形钢格构柱足尺破坏性稳定试验研究[J].建筑结构学报,2002, 23(5): 31-40.[6]童乐为,陈以一,郑鸿志,等.新白云国际机场航站楼钢管缀板柱足尺试验[J].同济大学学报,2003, 31(7):767-771.[7]郭彦林,邓科,林冰.梭形柱的稳定性能及设计方法研究[J].工业建筑,2007, 37(7): 92-95.[8]田伟,向新岸,赵阳,等. 考虑弯矩作用梭形钢格构柱稳定承载力非线性有限元分析[J]. 建筑结构学报,2010,31(5): 42-48.[9]田伟,赵阳,向新岸,等.考虑弯矩作用梭形钢格构柱的稳定性能[J].土木建筑与环境工程,2010,32(6):22-27.[10]同济大学.上海世博会阳光谷17m格构柱模型试验简报[R].上海:同济大学,2008.[11]同济大学.上海世博会阳光谷35m格构柱模型试验简报[R].上海:同济大学,2008.