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Issue 23/24

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The Structural Engineer
The Structural Engineer
The Structural Engineer
The Structural Engineer

The Institution of Structural Engineers has produced new guidance on design against disproportionate collapse. This guidance builds on methods used in the UK over the last four decades following the partial collapse of Ronan Point, a block of flats, after a gas explosion in 1968. It also comes at a time when the UK construction industry is changing from British Standards to European Standards; there is an increasing use of precast concrete systems; and analytical tools are available that offer to carry out detailed analysis of accidental events. This paper sets out the background to the UK approach to robustness, with the aim of improving the understanding of those now working in the construction industry. M. N. Bussell, BSc(Eng)(Hons) Consulting engineer (formerly Arup) A. E. K. Jones, BEng, PhD, CEng, FICE Arup

The Structural Engineer

Several seismic regions throughout the world demonstrate a high proportion of earthquake-vulnerable adobe (mud-brick) construction amongst poorer communities. Several adobe earthquake-retrofitting techniques have been developed, but dissemination of these techniques to the many communities at risk is a very significant challenge. This study looked at some of the echnical, financial and social aspects of development and implementation of retrofitting techniques in Peru. Joshua Macabuag, MEng Graduate Structural Engineer, Building Design Partnership

The Structural Engineer

The introduction of the Eurocodes for concrete design will alter the way that shear is approached for concrete structures. BS EN 1992-1-11 has adopted the variable angle truss model for shear, a more theoretically consistent approach than that used in BS 8110- 12. The model is confidently applied to rectangular sections, but its applicability to irregular sections is less clear. In particular, the behaviour of circular concrete sections is not well defined. This paper is intended to satisfy a requirement for design guidance on this topic that has been recognised by key BSI Committees. Using both experimental and theoretical data, the Eurocode variable angle truss model for shear design is assessed and extended to circular columns. J. J. Orr, MEng (Hons) Department of Architecture and Civil Engineering, University of Bath A. P. Darby, BSc, PhD, CEng, MIStructE Senior Lecturer, Structural Engineering, Department of Architecture and Civil Engineering, University of Bath T. J. Ibell, CEng, BSc(Eng), PhD, FIStructE, MICE, FHEA Professor of Civil Engineering, Department of Architecture and Civil Engineering, University of Bath S. R. Denton, MA, PhD, CEng, MICE Engineering Director, Civil Structures and Geotechnics, Parsons Brinckerhoff, Bristol J. D. Shave, MEng, PhD, CEng, MICE Principal Engineer, Civil Structures and Geotechnics, Parsons Brinckerhoff, Bristol