A Decade in the Life of the Clifton Suspension Bridge
The Clifton Suspension Bridge is an enduring icon to lovers of bridges and the City of Bristol alike. Yet this wonderful structure continually sets engineering challenges that must be addressed in a sympathetic and understanding manner, if it is to be preserved in perpetuity. The 2017 Sutherland Lecture will present a review of the Bridge over the past decade.
Since 2006, Flint & Neill (and their sub-consultant, Geo-Design) have acted as Engineer to the Clifton Suspension Bridge Trust. The lecture will explain how the initial focus on maintenance activities was redressed by the failure of a single component in 2009, leading to a holistic review of risk and the re-development of maintenance strategies. Aspects such as articulation, aerodynamic stability, corrosion, knowledge management and emergency response will be discussed.
Despite the apparent stability of the bridge foundations and of the high rock slopes that support them there is a long history of rock fall and deeper seated instability in the Clifton Gorge slopes. The strength and stability reserve of the abutments and of the chain anchorages has thus been a particular area of concern. A study commenced in 2007 with a ground investigation campaign and development of a geological model for each tower foundation area, followed by an extensive 'cutting-edge' numerical assessment. A better understanding of the ground and its interaction with the Bridge foundations has developed and this will be presented. It will explain how the investigation has evolved to understand the risks initially perceived, as far as is possible in the context of geological uncertainty and current methods of analysis.
E J Rees BEng ACGI MSc DIC CEng FICE
Flint & Neill Limited
A S Mulcahy BSc CEng MICE
Flint & Neill Limited
R A N Mackean BSc MSc CGeol CEng FGS MIMMM
Thursday, February 16, 2017 5:30 PM - 7:00 PMGreenwich Time
The Institution of Structural Engineers47-58 Bastwick Street,London EC1V 3PSUnited Kingdom
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