 |
 |
|
|
 |
 |
|
FORENSIC ENGINEERING
Web. www.PeterLindsell.com Tel. 02380 293833
Peter Lindsell & Associates have extensive research and professional experience resulting from detailed structural investigations conducted on laboratory models and full-scale structures. Particular experience of structural and material behaviour has been accumulated from detailed monitoring of structures in service and during controlled dismantling. The primary causes and contributory factors leading to structural collapses have been investigated in detail in cases involving industrial accidents and personal injuries.
Selected Publications
1.Lindsell P. “Structural Failures – A Combination of Classic Errors”. Seminar on Catastrophic Failures. Inst. of Civil Engineers, London, 30 September 1999.
2.Lindsell P and Buchner SH. “Investigation of Non-Catastrophic Failures”. International Conference on Forensic Engineering – A Professional Approach to Investigation, Inst. of Civil Engineers, London, 28-29 September 1998.
3.Price WIJ, Lindsell P and Buchner SH. “Monitoring of a Post-tensioned Bridge during Demolition”. IABSE Colloquium – Monitoring of Large Structures and Assessment of their Safety. IABSE Report, Vol. 56, Bergamo, October 1987, pp 357-365.
4.Lindsell P and Buchner SH. “Long-term Monitoring of Spill-through Abutments”. IStructE/BRE Seminar on Structural Assessment – Based on Full and Large Scale Testing, Watford, April 1987.
Structural appraisal of construction faults in 45m long post-tensioned concrete beams.
Structural Collapses
Peter Lindsell & Associates have been responsible for planning and supervising the controlled collapse of a diverse range of structures built in steel, concrete and masonry during demolition and dismantling projects. The range of experience gained over the last 30 years from research testing and demolition activities have therefore provided a sound basis for the investigation of uncontrolled and unexpected structural collapses.
Selected Projects
2006 Expert Witness - Health & Safety: Appraisal of Planning Supervisor performance prior to sudden collapse of building during refurbishment works, London.
2005 Structural Expert - Demolition: Site inspection and appraisal of causes of uncontrolled collapse of concrete building, London.
2005 Expert Witness - Health & Safety: Personal injury resulting from fall through fragile roof, London.
2004 Expert Witness - Demolition: Personal injury resulting from uncontrolled premature collapse of masonry structure, Kent.
2003Expert Witness - Demolition: Uncontrolled collapse of steel framed building, Middlesex.
2001 Expert Witness - Construction: Partial collapse of Suspension Bridge, Cornwall.
2000 Expert Witness- Demolition: Collapse of Cinema Building during demolition of the adjoining structure.
1999 Expert Witness – Demolition: Collapse of School Classrooms, Shropshire.
1998 Witness – Construction: Failure of Construction Rubbish Chute, Hampshire.
1998 Expert Witness – Demolition: Collapse of Prestressed Concrete Floor Units, London.
1996 Expert Witness – Demolition: Collapse of Internal Masonry Wall, London.
1996 Expert Witness – Demolition: Collapse of Sub-station Wall, Bristol.
1995 Expert Witness – Demolition: Progressive Collapse of Barrel Vault Roof, Dumfries.
Investigation of sudden collapse of Barrel Vault Roof.
Non-catastrophic Failures
Peter Lindsell & Associates have been involved in the appraisal of non-catastrophic structural failures since 1970. Detailed structural investigations have been conducted on a range of historic and modern bridges, residential buildings and industrial structures. Particular problems have arisen due to a combination of design deficiencies, construction defects, material effects, thermal loading and soil/structure interaction.
Selected Projects
2005 Bridge Bearing Failures: Independent review of procedures adopted for bearing replacements under Motorway Bridge. Highways Agency.
2002 Damage to End-zone of Bridge Widening: adjoining pretensioned bridge beams, Birmingham
1999 Safety Procedures: Broken tendons in post-tensioned Railway Bridge, Staffordshire.
1999 Load Testing: Flexural/shear failures in prestressed multi-storey Car Park, Surrey.
1999 Expert Witness: Severe cracking in rigid frame bridges, Greece.
1998 Expert Witness: Construction defects in 45m post-tensioned beams, Greece.
1997 Special Inspection: Flexural/shear failures in 45m post-tensioned beams, Pakistan.
1996 Stress Measurements: Torsional/buckling failures in plate girder footbridge, Surrey.
Monitoring of shear crack during incremental live load tests on a Rigid Frame Car Park.
Research Investigations
Peter Lindsell & Associates gained extensive research experience in testing both small-scale and full-size structures over a period of 15 years at Salford, Surrey and Oxford Universities. The research techniques have been widely employed in structural instrumentation, monitoring, load testing and the determination of in situ stresses in existing structures. In particular, live load testing of bridges has been applied to over 120 spans in order to verify the actual behaviour of structures, calibrate the theoretical idealisation and identify particular areas of structural weakness or additional strength.
Selected Projects
2004 Half-Joints: Feasibility of testing procedures for existing post-tensioned concrete half-joints, Highways Agency.
2003 Load Testing: Review of full-scale load testing procedures on post-tensioned concrete half-joint, Glasgow.
2003 Structural Monitoring: Response of steel swing bridge to thermal movements, East Sussex
2001 Structural Monitoring: Response of steel composite skew bridge to thermal movements, East Sussex
1999 Structural Monitoring: Response of rigid frame bridges to daily thermal cycles, Greece
1999 Structural Monitoring: Response of rigid frame car park to thermal movements, Surrey
1999 Load Testing: Determination of non-linear behaviour at critical sections in post-tensioned viaduct, Cumbria.
1998 Structural Monitoring: Loss of prestress in multi-tendon stressing system for tied arch, London.
1997 Structural Monitoring: Development of temporary prop forces during construction of wall, Lincolnshire.
1981-87 Structural Monitoring: Long-term monitoring of earth pressures and stresses in spill-through abutments, Surrey
Monitoring of temporary strut forces during construction of an Underpass beneath an existing railway bridge.