Generalized Method for Estimating Drift in High‐Rise Structures
Publication: Journal of Structural Engineering
Volume 110, Issue 7
Abstract
An approximate method for estimating the drift of multi‐bent structures is presented. Structures that are singly or doubly symmetrical in plan and comprising any combination of shear walls, coupled walls, rigid frames and braced frames, can be considered. Results for structures that are uniform with height compare closely with results from stiffness matrix computer analyses. The method is developed from coupled‐wall deflection theory which is expressed in terms of non‐dimensional structural parameters. The parameters involve three structural properties: the individual bending stiffness of the walls, the overall bending stiffness related to axial deformations of the walls and racking stiffness caused by reverse bending of the beams. Similar properties are calculated for rigid frames, braced frames and shear walls and then combined to determine values of the two parameters for the total structure. These values are then substituted into a generalized equation to obtain the deflection profile. This method accounts for axial deflection of the vertical components and is, therefore, more accurate for very tall structures. The method provides a rapid estimate of the drift in a high‐rise structure as well as allowing an easy means of comparing the suitability of different structural solutions for a tall building. The method also illustrates the fundamental dependence of the behavior of continuous type cantilevers on two characteristic parameters.
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References
1.
Abergel, D., “Deflection Solutions of Special Coupled Wall Structures by Differential Equations,” thesis presented to the Dept. of Civ. Engrg. and Applied Mechanics, McGill University, March, 1981, in partial fulfillment of the requirements for the degree of Master of Engineering.
2.
Goldberg, J. E., “Approximate Elastic Analysis,” Proceedings of the Conference on Tall Buildings, Lehigh University, 1972, pp. 169–183.
3.
Heidebrecht, A. C., and Stafford Smith, B., “Approximate Analysis of Tall Wall‐Frame Structures,” Journal of the Structural Engineering Division, Proceedings, ASCE, No. ST2, Feb., 1973, pp. 199–221.
4.
Stafford Smith, B., Kuster, M., and Hoenderkamp, J. C. D., “A Generalized Approach to the Deflection Analysis of Braced Frame, Rigid Frame and Coupled Wall Structures,” Canadian Journal of Civil Engineering, June, 1981.
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Copyright © 1984 ASCE.
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Published online: Jul 1, 1984
Published in print: Jul 1984
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