Effect of surface roughness and putty thickness on the bond performance of FRP laminates

Author

Xianlin Shen

Abstract

"The use of externally bonded fiber reinforced polymer (FRP) sheets to strengthen and rehabilitate existing concrete structures has recently received a great deal of attention within the Civil Engineering community. Numerous experimental studies have demonstrated the effectiveness of externally FRP strengthened reinforced concrete (RC) structures. However, many gaps still exist in the knowledge that is required in order for the technique to gain widespread acceptance. For instance, the bond between FRP and concrete as well as the wide variety of bond failure modes are incompletely understood and require further investigation. The overall performance of the system depends highly upon the bond quality between the concrete and the FRP laminates. Low bond strength can cause delamination and result in a premature failure of a repaired structure.

It was reported that the failure of a reinforced concrete member strengthened with FRP laminates may be caused by crushing of concrete, rupture of FRP laminates, or by the de-lamination of the FRP sheet. When a peeling or de-lamination failure can be avoided, a more effective engagement of the FRP sheet occurs which results in more efficient use of material. Previous research has noted that several items influence FRP- concrete bond strength including concrete strength, type of FRP laminate, number of layers of the FRP laminate, putty thickness and the bonding agent or epoxy saturant used. Others have also reported that the surface condition or roughness prior to strengthening has an influence on bond performance. To that end, an experimental program was undertaken to investigate the effect of a broad range of surface roughnesses and putty- thickness on bond strength. Concrete with different compressive strength were used in four different phases"--Abstract, page iii.

Advisor(s)

Myers, John

Committee Member(s)

Maerz, Norbert H.
Galecki, Greg
Chen, Genda

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2002

Pagination

xvii, 181 pages

Note about bibliography

Includes bibliographical references (pages 175-180).

Rights

© 2002 Xianlin Shen, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Fiber-reinforced plastics
Concrete beams -- Maintenance and repair

Thesis Number

T 8172

Print OCLC #

52731320

Electronic OCLC #

1028578285

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.

Recommended Citation

Shen, Xianlin, "Effect of surface roughness and putty thickness on the bond performance of FRP laminates" (2002). Masters Theses. 2261.
https://scholarsmine.mst.edu/masters_theses/2261