The British Geotechnical Association (BGA) is the principal
association for geotechnical engineers in the United Kingdom.

Shallow Foundation Capacity - Bearing Strength Surface Insights

BGA Meeting
  • 31.10.2018
  • 18:30 - 20:30
  • Telford Lecture Theatre, Institution of Civil Engineers, One Great George Street, London, SW1P 3AA
  • Organiser: British Geotechnical Association
  • Download to Calendar
No description available

Shallow Foundation Capacity - Bearing Strength Surface Insights

2018 Geotechnical Engineering Lecture

by Professor Michael Pender of the University of Auckland

Wednesday 31st October 2018 at 18:30 hours

Institution of Civil Engineers, One Great George Street, Westminster, London SW1P 3AA

The Geotechnical Engineering Lecture is a biennial lecture nominated by the Editorial Panel of ICE Proceedings Geotechnical Engineering.

This event is free to attend, but advance booking is required, via the link at the bottom of this page.

A flyer can be downloaded here.

The lecture will show how shallow foundation behaviour under general loading (vertical load, horizontal shear, and moment) is more interesting than the standard bearing capacity equation suggests. In fact, manipulation of the equation reveals that beautiful bearing strength surfaces (BSS) are implied. These surfaces are the locus of all possible combinations of vertical load, horizontal shear, and moment, which will induce bearing failure of a shallow foundation.

The background to this statement will be elaborated and the equivalence between conventional bearing strength calculations and those using the BSS will be demonstrated. The proposal will be made that calculations using the conventional equation are likely to be more attractive in a design office setting and, with the visual understanding provided by bearing strength surface thinking, better informed. In this way the “black-box” aspect of the conventional bearing strength equation is illuminated.

Applications to foundations for gravity retaining walls, both under static load and earthquake loading, will be considered. Then the discussion will be extended to the modelling of shallow foundations for multi-storey buildings under earthquake loading incorporating data obtained from field testing of near prototype scale rocking foundations and observations from the behaviour of large buildings in Christchurch on shallow foundations in gravels during the events of 2010 and 2011. Finally, the preparation of input data for structural analysis software modelling foundation-soil interaction with a bed of springs will be considered.

Michael Pender

Michael has been a staff member of the Department of Civil and Environmental Engineering at the University of Auckland since 1977. Prior to that he worked for the New Zealand Ministry of Works and Development and spent an 18 month period with the soil mechanics group at Cambridge University on a New Zealand University Grants Committee Post-Doctoral Fellowship. He is Professor of Geotechnical Engineering, a position he has held since 1985. In addition he is a Visiting Professor to the European School for Advanced Studies in the Reductionof Seismic Risk, University of Pavia.

He is a Fellow of the Institution of Professional Engineers New Zealand, a Life Member of the New Zealand Geotechnical Society, a Fellow and Life Member of the New Zealand Society for Earthquake Engineering.

His primary areas of interest in teaching, research, and consulting are: the elucidation of the geotechnical properties of NZ materials, particularly soils of residual or volcanic origin; the earthquake resistant design of foundations; limit state design in geotechnical engineering; and the engineering behavior of closely jointed rock masses.

At this stage in his career he finds equal fulfilment in teaching and research; in fact, the reasons he continues working are (i) he is still learning, and (ii) the student feedback he receives for his teaching of foundation engineering.

Please join us afterwards in the ICE Café Bar for drinks sponsored by Fugro.

Book now

Become a Member

Join the British Geotechnical Association to keep up to date with the latest BGA news