A preventive strengthening strategy for aged steel columns

W. Lin, N. Taniguchi, T. Yoda, S. Satake

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Steel columns are widely used in buildings, bridge piers, and railway platform roofs etc. With aging, those steel columns are vulnerable to corrosion and fatigue, and can deteriorate for a variety of reasons, especially in great earthquakes. In order to avoid the unrecoverable damage of existing steel columns, the high cost of the structure owners and the great impact on the public use, effective preventive maintenance methods on the aged steel piers are necessary. On this background, a strengthening method for aged steel columns by using new construction materials such as glass fiber reinforced polymer (GFRP) plates, rapid hardening concrete, rubber-latex mortar, and reinforcing bars, is introduced in this study. Depending on possible applied load directions and corrosion conditions, two specimens were used in the loading tests. Static loading tests were performed on steel columns with and without strengthening. Applied load and deflection relationship and strain distribution on original and strengthened columns were measured and compared. Moreover, three-dimensional FE models were built, and the numerical results were compared with the test results. Both experimental and numerical results indicate that the present strengthening method can significantly enhance both rigidity and ultimate load carrying capacity of aged steel columns.

Original languageEnglish
Title of host publicationMaintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018
EditorsDan M. Frangopol, Riadh Al-Mahaidi, Colin Caprani, Nigel Powers
Pages2470-2476
Number of pages7
Publication statusPublished - 1 Jan 2018
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Bridge Maintenance, Safety and Management - Melbourne, Australia
Duration: 9 Jul 201813 Jul 2018
Conference number: 9

Conference

ConferenceInternational Conference on Bridge Maintenance, Safety and Management
Abbreviated titleIABMAS
CountryAustralia
CityMelbourne
Period09/07/201813/07/2018

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