May, Ian Melville (1976) Restrained composite columns. PhD thesis, University of Warwick.

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Abstract

This Thesis describes the development of an analysis for
inelastic columns, with cross-sections composed of one or more
materials, loaded with axial load and biaxial moments. The
column can have both rotational and directional restraints at
its ends. The analysis has been programmed for a computer and
subsequently tested against published results for steel columns,
reinforced concrete columns, and concrete-encased steel composite
columns and shown to give good agreement.
A test rig with an axial load capacity of 2MN and capable
of testing full-scale columns of any practical length has been
designed and built. Columns with elastic and elastic-plastic
rotational restraints or, pin-ends or any combination can be
tested and column end-moments of up to 50 kNm can be applied
through the beams. One important feature of the test rig is sets
of crossed knife-edges, which give both major and minor axis
rotational freedom and thus allow accurate positioning of the
axial load.
Eight elastically restrained concrete-encased steel composite
no-sway columns have been tested, three with biaxial restraints
and loadings, using the rig. The results from the tests have
been compared with predictions using the computer program and
agreement between the observed and predicted results for ultimate
loads, deflections, and end-moments is good.
The behaviour of column lengths within rigid-Jointed no-sway
frames with both plastically and elastically designed beams has
been studied. For the case of a column with elastic restraints
design proposals have been checked and shown to be conservative.
When the beams are designed plastically it is recommended that a
conservative approach should be adopted until further research
has been carried out into this topic.

Item Type:	Thesis (PhD)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Library of Congress Subject Headings (LCSH):	Columns -- Analysis, Composite construction -- Analysis
Official Date:	October 1976
Dates:	Date Event October 1976 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Johnson, R. P. (Roger Paul) ;
Sponsors:	Building Research Establishment
Extent:	xxvi, 279 p.
Language:	eng

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