Optimal Design of RC Column Seismic Retrofitting for Multiple Performance Objectives with an Integrated Damping and Strengthening Methodology


In this paper, a damping-enhanced strengthening methodology is introduced to enable the optimal retrofitting design of columns for normalized performances under multiple objectives. It is an integrated sandwich system of two fiber reinforced polymer (FRP) sheets and one viscoelastic (VE) layer. Parametric analyses indicated that the VE layer applied on a 1/5-scale reinforced concrete (RC) column can reduce the elastic acceleration and displacement of the column by approximately 50%. This level of effectiveness remains unchanged or is enhanced as the column begins rocking on its footing. The numerical results are in good agreement with the shake table test data of one column specimen. Based on the validated model, it was observed that applying VE layers of 3/32-inch thick on the lower 4070% height of the column appears most efficient and, for a full-scale column, damping ratio can be increased by as much as 15 times with the proposed methodology, resulting in significant mitigation in peak responses.

Meeting Name

100th Anniversary Earthquake Conference


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Earthquake Dampers; Fiber Reinforced Plastics; Reinforced Concrete; Retrofitting; Seismic Phenomena; Shake Table Tests

Document Type

Article - Conference proceedings

Document Version


File Type





© 2006 Earthquake Engineering Research Institute (EERI), All rights reserved.

Publication Date

01 Apr 2006

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