Prestressed Slender Lattice Frames
Publication: Journal of Structural Engineering
Volume 116, Issue 7
Abstract
Previous research on the prestressing of lattice frames dealt with relatively short two‐ and three‐dimensional frames. It was found that prestressing the diagonals in frames with intersecting diagonals did not increase the load‐carrying capacity. Offsetting the diagonals on the crossarm or on the verticals, and prestressing these offset diagonals, increased the load‐carrying capacity. It was felt that in a slender structure the effects of prestressing would be even more pronounced. As a result, it was decided to undertake a study of a slender prestressed lattice frame. The failure mode of this frame, one of Euler‐type buckling, is different from that observed in the short frames, which is essentially one of buckling of the verticals between the panel points. A 23‐story slender lattice frame, prestressed and nonprestressed, with axial load and then with axial and lateral load, was studied experimentally and theoretically. It was found that prestressing the diagonals is beneficial in increasing the load‐carrying capacity and reducing lateral deflection.
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References
1.
Ellis, J. S. (1980). “Prestressed lattice beam‐columns with offset diagonals.” Can. J. Civ. Engrg., 7(4), 573–587.
2.
Prakash, M. V. (1986). “Behaviour of prestressed lattice structures,” thesis presented to the University of Windsor, at Windsor, Ontario, Canada, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
3.
Temple, M. C., and Prakash, M. V. (1990). “Prestressed lattice frames with intersecting and offset diagonals.” J. Struct. Engrg., ASCE, 116(7), 1923–1942.
Information & Authors
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Published In
Journal of Structural Engineering
Volume 116 • Issue 7 • July 1990
Pages: 1943 - 1954
Copyright
Copyright © 1990 ASCE.
History
Published online: Jul 1, 1990
Published in print: Jul 1990
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