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Fiber-Reinforced Polymer for Structural Strengthening: Post-Tensioning of Steel Silos

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This paper illustrates a case study in which FRP pultruded laminates were used for strengthening circular steel silos. FRP laminate hoops were applied as external "belts" resting on discrete supports on the perimeter of the silos. Using a simple mechanical device, the laminates were manually post-tensioned to the desired load level, measured indirectly using electric strain gages. Active strengthening allowed the laminates to compensate for part of the existing deformation of the walls, and to optimise the state of stress in the steel structure by tailoring the post-tensioning level. This paper examines in detail the design process, the experimental tests conducted for proper design of the construction details and the implementation of the strengthening system.

Document Type: Research Report


Publication date: May 1, 2003

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    Structural Engineering International (SEI), the quarterly Journal of IABSE, published since 1991, is the leading international journal of structural engineering dealing with all types of structures and materials. SEI offers its readers a unique blend of short profiles on recent structures, and longer, in-depth technical articles on research, development, design, construction and maintenance. Articles are written by practicing engineers and academia from around the world and reflect the high standards of IABSE. IABSE Peer Review stamps are given to papers that have passed through a highly selective review process and demonstrate a significant contribution to the state of structural engineering knowledge.To recognise contributions of the highest quality, an Outstanding Paper Award is presented each year.

    SEI is printed in Switzerland; ISSN 1016-8664; E-ISSN 1683-0350
    Abstracted and indexed at: Web of ScienceSM; Science Citation Index Expanded (SciSearch); Journal Citation Reports/Science Edition; Current ContentsR/Engineering, Computing and Technology; CAB Abstracts database; INSPEC, CBA and others.

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