Doctoral Dissertations
Abstract
"A damping-enhanced strengthening methodology is proposed to enable a cost- effective retrofitting design of reinforced concrete (RC) columns for multiple performances objectives. This methodology involves the integration of viscoelastic (VE) damping layers and fiber reinforced polymer (FRP) strengthening sheets into one compact retrofitting system. Both analysis and experiment were conducted to develop and validate the proposed methodology and design equation for the retrofitting system. A distributed mass model of a cantilever rectangular column retrofitted with the proposed system was developed according to the Euler-beam theory. Parametric studies were conducted to understand how sensitive the performance of the proposed system is to its design parameters. In the experimental program, VE material properties were characterized under various conditions, the bond behavior between VE layers and FRP sheets as well as the anchorage behavior between FRP sheets and concrete were investigated, and shake table tests were conducted to validate the effectiveness of the proposed system. Test results show that VE properties can be related to excitation frequency and temperature by KASAI equation. The proposed bonding and anchoring mechanisms can effectively transfer damping force from concrete, FRP sheets, VE layers to the foundation of a RC column. The anchorage design equation proposed in this study was verified by test data. Numerical results for 1/5-scale RC columns were compared and agreed well with those from the shake table tests. The proposed retrofit system can increase the damping of small-scale columns by more than 90% and as high as 1500% for the corresponding full-scale columns, depending on their slenderness ratio"--Abstract, page iii.
Advisor(s)
Chen, Genda
Committee Member(s)
LaBoube, Roger A.
Myers, John J.
Silva, Pedro Franco
Chandrashekhara, K.
Department(s)
Civil, Architectural and Environmental Engineering
Degree Name
Ph. D. in Civil Engineering
Publisher
University of Missouri--Rolla
Publication Date
Summer 2005
Pagination
xii, 174 pages
Note about bibliography
Includes bibliographical references (pages 168-173).
Rights
© 2005 Xi Huang, All rights reserved.
Document Type
Dissertation - Restricted Access
File Type
text
Language
English
Subject Headings
Reinforced concrete construction -- Maintenance and repair
Viscoelastic materials
Fiber-reinforced plastics
Damping (Mechanics)
Thesis Number
T 8728
Print OCLC #
173181538
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.
http://merlin.lib.umsystem.edu/record=b5962625~S5Recommended Citation
Huang, Xi, "An integrated VE damping and FRP strengthening system for performance-based seismic retrofit of RC columns" (2005). Doctoral Dissertations. 1715.
https://scholarsmine.mst.edu/doctoral_dissertations/1715
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Comments
Financial support to complete this study was in part provided by the National Science Foundation (NSF) under CAREER Award No. CMS9733123, the NSF University/Industry Rehabilitation of Building and Bridge Center (RB2C) at the University of Missouri--Rolla (UMR), and Federal Highway Administration under Contract Agreement DTFH61-02-X-0009.