Improved Wide‐Column‐Frame Analogy for Shear/Core Wall Analysis
Publication: Journal of Structural Engineering
Volume 119, Issue 2
Abstract
The wide‐column‐frame analogy is popular in design offices for the analysis of shear/core wall buildings. However, it has been found to yield erroneous results in cases where shear deformation of the walls is significant, e.g. core walls subjected to torsion. There are two sources of error. First, due to discrete modeling of the vertical joints between adjacent planar wall units, the wall elements are subjected to parasitic moments, which cause artificial flexure of the elements and eventually excessive shear deformation of the walls. Second, the rotations of the coupling beams at the beam‐wall joints have been mistaken as equal to the rotations of the horizontal rigid arms and, as a result, the beam end rotations are underestimated by amount equal to the shear strain in the walls. It is proposed that these problems be resolved by: (1) Adjusting the shear deformation factor of the wall elements to compensate for the errors in shear deformation due to artificial flexure; and (2) using beam elements with vertical rigid arms for the coupling beams, so as to eliminate the errors in beam end rotations. Substantial improvement in accuracy is achieved with these modifications.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Candy, C. F. (1964). “Analysis of shear‐wall frames by computer.” New Zealand Engrg., Wellington, New Zealand, 19(9), 342–347.
2.
Cheung, Y.K. (1983). “Chapter 38: Tall buildings 2.” Handbook of structural concrete, F.K. Kong et al., eds., Pitman Books Limited, London, England.
3.
Clough, R. W., King, I. P., and Wilson, E. L. (1964). “Structural analysis of multistory buildings.” J. Struct. Div., ASCE, 90(3), 19–34.
4.
Girgis, A., and Stafford Smith, B. (1979). “The torsional analysis of tall building cores partially closed by beams.” Proc., Symp. on Behavior of Building Systems and Components, Vanderbilt University, Nashville, Tenn., 211–227.
5.
Kwan, A.K.H.(1991). “Analysis of coupled wall/frame structures by frame method with shear deformation allowed.” Proc., Instn. Civ. Engrs., 91(Part 2; Jun.), 273–297.
6.
Kwan, A.K.H. (1992). “Reformulation of the frame method.” Proc., Instn. Civ. Engrs. Struct. & Buildings, Vol. 94(Feb.), 103–116.
7.
MacLeod, I. A. (1967). “Lateral stiffness of shear walls with openings.” Proc., Symp. on Tall Buildings, Pergamon Press, London, England, 223–252.
8.
MacLeod, I. A. (1973). “Analysis of shear wall buildings by the frame method.” Proc., Instn. Civ. Engrs., 55(Part 2; Sept.), 593–603.
9.
MacLeod, I. A. (1976). “General frame element for shear wall analysis.” Proc., Instn. Civ. Engrs., 61(Part 2; Dec.), 785–790.
10.
MacLeod, I. A. (1977). “Structural analysis of wall systems.” Struct. Engr., 55(11), 487–495.
11.
MacLeod, I. A., and Hosny, H. M. (1977). “Frame analysis of shear wall cores.” J. Struct. Div., ASCE, 103(10), 2037–2047.
12.
Rutenberg, A., Shtarkman, M., and Eisenberger, M. (1986). “Torsional analysis methods for perforated cores.” J. Struct. Div., ASCE, 112(6), 1207–1227.
13.
Stafford Smith, B., and Abate, A. (1981). “Analysis of non‐planar shear wall assemblies by analogous frame.” Proc., Instn. Civ. Engrs., 71(Part 2; Jun.), 395–406.
14.
Stafford Smith, B., Girgis, A., and Abate, A. (1981). “Analogous frames for the analysis of tall shear wall structures.” Can. J. of Civ. Engrg., 8(2), 179–185.
15.
Stafford Smith, B., and Girgis, A. (1984). “Simple analogous frames for shear wall analysis.” J. Struct. Div., ASCE, 110(11), 2655–2666.
16.
Stafford Smith, B., and Girgis, A. M. (1986). “Deficiencies in the wide column analogy for shearwall core analysis.” Concrete Int., (Apr.), 58–61.
17.
Tso, W.K., and Biswas, J. K. (1973). “General analysis of nonplanar coupled shear walls.” J. Struct. Div., ASCE, 99(3), 365–380.
Information & Authors
Information
Published In
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Sep 26, 1991
Published online: Feb 1, 1993
Published in print: Feb 1993
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.