Masters Theses

Abstract

"This research investigates the potential for an alternative masonry product to use in masonry infill wall systems. The study also investigates the effects of an external fiber reinforced polymer (FRP) strengthening system on in-plane behavior of the alternative unreinforced masonry (URM) walls. The alternative masonry product is produced in a solid unit configuration and utilizes recycled white oak wood-fibers and an ASTM Class-C fly ash as its raw materials. The external strengthening system investigated consists of an elastomeric polyurea surface coating with and without integrated discrete chopped E-glass fibers which is directly sprayed on the URM wall surfaces. The alternative URM wall system with the external FRP retrofit is intended to provide an economic and an environmentally friendly solution for building industries to provide enhanced public safety for infill walls subjected to extreme events. The experimental program includes manufacture of the alternative masonry units, URM wall construction, wall surface strengthening, and diagonal compression tests of the walls. In the first phase, three URM walls were constructed with alternative masonry with different unit strength and the walls were tested without a surface retrofit. The in-plane load capacity and the failure modes were observed. In the second phase, five URM walls with units having comparable strength were constructed and each wall was retrofitted using a different strengthening scheme. The effects of surface strengthening were compared in terms of a load capacity, degree of fragmentation at failure, and overall deformation. From the test results, it was observed that the failure mode of this alternative URM wall depends on the unit strength. The strengthening was both effective not only in preventing debris scatter at failure but also in improving the load capacity and ductility of the URM walls"--Abstract, page iii.

Advisor(s)

Myers, John

Committee Member(s)

Ayoub, Ashraf Salah Eldin
Baird, Jason, 1955-

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2009

Pagination

xiv, 96 pages

Note about bibliography

Includes bibliographical references (pages 92-95).

Rights

© 2009 Yosuke Tanizawa, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Subject Headings

Structural analysis (Engineering)Masonry -- TestingFly ashPolyurethane elastomers

Thesis Number

T 10222

Print OCLC #

863153573

Electronic OCLC #

906056218

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