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UBC Theses and Dissertations
Static and dynamic testing of MIDPLY TM shear wall system Buitelaar, Marlen
Abstract
The work documented in this thesis constitutes the second year of the three-year MIDPLY™ project. The MIDPLY™ shear wall system is a new invention for strengthening new and existing light frame timber buildings against earthquakes and high ' winds. The system needed to be tested before its implementation in the field (US Patent US5782054: Wood Wall Structure). As part of an ongoing research project undertaken by Forintek Canada Corp. and the University of British Columbia, the MIDPLY™ shear wall system was designed, tested, and developed in order to procure an improved product over the conventional shear wall presently used in construction. The objective of this project was three-fold: 1. Improve the behaviour of timber shear walls by utilizing conventional timber products combined with new technology - the MIDPLY™ wall. 2. Quantify the improvements though full-scale static and dynamic testing of the MIDPLY™ shear walls. 3. Determine failure modes and load-displacement characteristics of the MIDPLY™ walls. The work in this thesis comprises of static testing, dynamic testing, structural modeling, and shear wall connection design and implementation. Several configurations of 2.44m x 2.44m walls were tested statically at Forintek Canada Corp., where from three configurations were chosen to be tested dynamically at the Earthquake Engineering Laboaratory at UBC. The configurations of MIDPLY™ walls were tested under two different earthquake records. In total, 40 static tests, which include monotonic and reversed cyclic tests, and 6 dynamic tests were performed as part of the scope of this thesis. Throughout the testing, the parameters that were varied were lumber size, stud spacing, lumber type, loading protocol, hold down connection type, and vertical loading. The results of the testing clearly showed the strengths and weaknesses of the MIDPLY™ shear wall system. Two strengths were that the MIDPLY™ wall could withstand higher loads and displacements than the conventional light frame timber shear wall used in most buildings in North America. Also, some common failure modes from other walls were eliminated. The weakness was that the wall sometimes failed in a brittle manner through end-stud failure. The future plans of the MIDPLY™ project include new connection designs to further improve racking performance.
Item Metadata
Title |
Static and dynamic testing of MIDPLY TM shear wall system
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2001
|
Description |
The work documented in this thesis constitutes the second year of the three-year
MIDPLY™ project. The MIDPLY™ shear wall system is a new invention for
strengthening new and existing light frame timber buildings against earthquakes and high
' winds. The system needed to be tested before its implementation in the field (US Patent
US5782054: Wood Wall Structure).
As part of an ongoing research project undertaken by Forintek Canada Corp. and the
University of British Columbia, the MIDPLY™ shear wall system was designed, tested,
and developed in order to procure an improved product over the conventional shear wall
presently used in construction.
The objective of this project was three-fold:
1. Improve the behaviour of timber shear walls by utilizing conventional timber
products combined with new technology - the MIDPLY™ wall.
2. Quantify the improvements though full-scale static and dynamic testing of the
MIDPLY™ shear walls.
3. Determine failure modes and load-displacement characteristics of the MIDPLY™
walls.
The work in this thesis comprises of static testing, dynamic testing, structural modeling,
and shear wall connection design and implementation. Several configurations of 2.44m x
2.44m walls were tested statically at Forintek Canada Corp., where from three
configurations were chosen to be tested dynamically at the Earthquake Engineering
Laboaratory at UBC. The configurations of MIDPLY™ walls were tested under two
different earthquake records.
In total, 40 static tests, which include monotonic and reversed cyclic tests, and 6 dynamic
tests were performed as part of the scope of this thesis. Throughout the testing, the
parameters that were varied were lumber size, stud spacing, lumber type, loading
protocol, hold down connection type, and vertical loading.
The results of the testing clearly showed the strengths and weaknesses of the MIDPLY™
shear wall system. Two strengths were that the MIDPLY™ wall could withstand higher
loads and displacements than the conventional light frame timber shear wall used in most
buildings in North America. Also, some common failure modes from other walls were
eliminated. The weakness was that the wall sometimes failed in a brittle manner through
end-stud failure. The future plans of the MIDPLY™ project include new connection designs to further
improve racking performance.
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Extent |
29173628 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-09-14
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0063735
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2001-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.