Author: Liauw, T C;Leung, King-Wai
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Liauw, T C;Leung, King-Wai
The Structural Engineer, Volume 53, Issue 4, 1975
Increasingly over the past few months we have become aware of the grave concern of members for ordinary people involved in the HAC structures. People with houses to sell, those who wish to raise second mortgages and so forth, can be in a most unfortunate situation, since in the view of building societies and similar organizations these buildings are suspect even if HAC has been used only in standard lintels over windows or door openings, specifically defined in the DOE circular letter of 20 July 1974 as not being 'structural work for the purposes of this letter'. Verulam
The design of remforced concrete deep beams is not yet covered by the new British Code CP110:1972. The major design methods currently available are reviewed in this paper, namely, those proposed by ( l ) the European Concrete Committee in 1970; ( 2 ) the American Concrete Institute in 1971; and (3) the Portland Cement Association in its long standing document ST66 issued in 1946. The more recent proposals by the authors and their co-workers are also explained; unlike the others, the authors' proposals cover also deep beams with web openings. F.K. Kong, P.J. Robins and G.R. Sharp
A series of static tests on thin walled square box specimens, direction fixed at their ends, and subjected to axial overload until gross inelastic distortion occurred are described in this paper. Observations were made on the mode of buckling, the peak load sustained, and the load-shortening characteristics. A simple theory is also presented in which no account is taken of elastic deformations, but folding is assumed to occur along straight lines, together with kinking of the corner edges, and, by assuming a kinematically admissible pattern of such folds, a virtual work analysis is derived to predict theoretical load-shortening characteristics. Reasonable agreement is shown to exist between the theoretical and experimental results. B. Rawlings and P. Shapland