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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

23卷

期数:

2006年02期

页码:

9-19

栏目:

出版日期:

2006-06-20

文章信息/Info

Title:

Plastic Analysis of Frames with Tapered Members

作者:

W.S.King¹,C.J.Chen¹,L.Duan²,W.F.Chen³

1. 朝阳科技大学 结构工程系,中国台湾 雾峰 00886; 2. 加利福尼亚大学 交通工程系,加利福尼亚 萨克拉曼多 CA95816; 3. 夏威夷大学 工程学院,夏威夷 火奴鲁鲁 HI96822

Author(s):

W. S. King¹, C. J. Chen¹, L. Duan², W. F. Chen³

1. Department of Construction Engineering, Chaoyang University of Technology, Wufeng 00886, Taiwan, China; 2. Department of Traffic Engineering, University of California, Sacramento CA95816, California, USA; 3. School of Engineering, University of Hawaii, Honolulu HI96822, Hawaii, USA

关键词:

楔形构件;  梁柱单元;  塑性铰;  结构工程;  钢结构

Keywords:

tapered member;  beam-column element;  plastic hinge;  structural engineering;  steel

分类号:

TU313.2

DOI:

-

文献标志码:

A

摘要:

对一些平面内楔形截面构件进行二阶简单塑性铰法分析,并利用有限元法及重叠原理推导I形钢楔形截面构件的刚度矩阵。为预测构件内部可能形成塑性铰的位置,以一个同时受弯矩及轴力作用的梁柱单元,仿真各种不同边界条件的楔形截面构件。若预测构件内会形成塑性铰的位置则要增设一个节点,将一个构件分割为两个单元,以获得最合理的荷载-挠度曲线。楔形截面构件的刚度矩阵应特别注意方向性的问题。若没有考虑到任一构件中可能形成塑性铰的位置,就不能准确地预测梁柱真实的极限承载能力。若仅用一个单元代表一个楔形截面构件就会高估极限承载能力。该方法可合理地应用于具有楔形截面构件框架的塑性分析。

Abstract:

Several in-plane tapered members were analyzed by the simple plastic hinge method. The stiffness matrix of an I-section tapered element was derived by the finite element method with the use of superposition principle. In order to predict the locations of plastic hinges formation in members, an element subjected to bending moments and an axial load was modeled to simulate these tapered members with different boundary conditions. An additional nodal point was set after the formation of a plastic hinge was detected within the element. The most reasonable load and deflection curve could be obtained by using the two elements for each member. One should pay attention to the problem of direction in the stiffness matrix of a tapered element. The actual limit load of a beam-column could not be predicted correctly if the possible formation of a plastic hinge in a member was not considered. The limit load would be overestimated if only one element was used for a tapered member. The results show that the proposed method can be reasonably applied to the plastic analysis of frames with tapered members.

参考文献/References:

[1] HAYALIOGLU M S,SAKA M P.Optimum Design of Geometrically Nonlinear Elastic-Plastic Steel Frames with Tapered Members[J].Computers and Structures,1992,44(4):915-924.
[2] FERTIS D G,KEENE M E.Elastic and Inelastic Analysis of Nonprismatic Member[J].Journal of Structural Engineering,ASCE,1990,116(2):475-489.
[3] MOHAMED S E,KOUNADIS A N,SIMITSES G J.Elasto-Plastic Analysis of Gabled Frames with Nonprismatic Geometries[J].Computers and Structures,1992,44(3):693-697.
[4] KING W S,CHEN W F.Practical Second-Order Inelastic Analysis of Semi-rigid Frames[J].Journal of Structural Engineering,ASCE,1994,120(7):2 156-2 175.
[5] DUAN L,CHEN W F.A Yield Surface Equation for Doubly Symmetrical Section[J].Engineering Structures,1990,12(2):114-119.
[6] CHEN W F,ATSUTA T.Theory of Beam-Columns,in-Plane Behavior and Design[M].New York:McGraw-Hill Book Co.,1976.
[7] CHEN C J.The Elastic-Plastic Analysis of Frames with Tapered Members[D].Tooyuan:Chung Cheng Institute of Technology,1995.
[8] GERE J M,CARTER W O.Critical Buckling Loads for Tapered Columns[J].Journal of the Structural Division,ASCE,1962,88(S1):1-11.
[9] FOGEL C M,KETTER R L.Elastic Strength of Tapered Columns[J].Journal of the Structural Division,ASCE,1962,88(S5):67-106.
[10] TIMOSHENKO S P,GERE J M.Mechanics of Materials[M].Belmont:Wadsworth Inc,1984.
[11] CHEN W F,LUI E M.Structural Stability:Theory and Implementation[M].New York:Elsevier Science Publishing Co.,1987.
[12] ATTALLA M R,DRIERLEIN G G,MCGUIRE W.Spread of Plasticity:Quasi-Plastic-Hinge Approach[J].Journal of Structural Engineering,ASCE,1994,120(8):2 451-2 473.

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备注/Memo

备注/Memo:

Received date:2006-04-23 Biography:W. S. King(1971-), male, Taiwan, China, professor, PhD, E-mail:wonsunking@yahoo.com.cn.

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更新日期/Last Update: 2006-06-20