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Seismic performance of post-and-beam wood buildings Li, Minghao
Abstract
This thesis presents a study to evaluate the seismic performance of post-and-beam (P&B) wood assemblies and buildings of Japanese style using computer modeling, experimental studies and probabilistic-based approaches. A numerical model called “PB3D” is proposed to predict the lateral response of the P&B buildings under static or dynamic loads. Special techniques are used to reduce the problem size and improve computational efficiency with reasonable prediction accuracy. This model simplifies a P&B building into a combination of 2D assemblies (e.g. shear walls, floor/roof diaphragms) while capturing the global structural responses of interest (e.g., inter-story drift and floor/roof acceleration). A mechanics-based wood shear wall model is implemented to represent the hysteretic properties of symmetric/nonsymmetric P&B walls. Roof/floor diaphragms are modeled as structural frames with calibrated equivalent diagonal braces in order to consider the influence of the diaphragm in-plane stiffness on the building performance. Experimental studies have been conducted to study the behavior of 2D assemblies and buildings. The engineering characteristics of single-brace P&B walls have been evaluated by monotonic and reversed cyclic tests. The contribution of additional gypsum wallboards to the wall lateral resistance has also been studied. An in-plane pushover test has been conducted to study the in-plane stiffness of a floor diaphragm. Two one-story P&B buildings have been tested under biaxial static loads and one-directional seismic loads, respectively. The established test database as well as a test database of a two-story P&B building provided by a research institute in Japan has been used to verify the “PB3D” model. Using the response surface method with importance sampling and considering the uncertainties involved in seismic ground motions, structural mass, and response surface fitting errors, seismic reliability analyses have been conducted to estimate the seismic reliabilities of a series of shear walls, a one-story building and a two-story building. System effect on the shear wall reliability has also been studied. The framework presented in this thesis provides a useful tool to assess the seismic performance of the P&B wood buildings and to aid the performance-based seismic design of these structural systems.
Item Metadata
Title |
Seismic performance of post-and-beam wood buildings
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
2009
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Description |
This thesis presents a study to evaluate the seismic performance of post-and-beam
(P&B) wood assemblies and buildings of Japanese style using computer modeling,
experimental studies and probabilistic-based approaches.
A numerical model called “PB3D” is proposed to predict the lateral response of the
P&B buildings under static or dynamic loads. Special techniques are used to reduce the
problem size and improve computational efficiency with reasonable prediction accuracy.
This model simplifies a P&B building into a combination of 2D assemblies (e.g. shear
walls, floor/roof diaphragms) while capturing the global structural responses of interest
(e.g., inter-story drift and floor/roof acceleration). A mechanics-based wood shear wall
model is implemented to represent the hysteretic properties of symmetric/nonsymmetric
P&B walls. Roof/floor diaphragms are modeled as structural frames with calibrated
equivalent diagonal braces in order to consider the influence of the diaphragm in-plane
stiffness on the building performance.
Experimental studies have been conducted to study the behavior of 2D assemblies
and buildings. The engineering characteristics of single-brace P&B walls have been
evaluated by monotonic and reversed cyclic tests. The contribution of additional gypsum
wallboards to the wall lateral resistance has also been studied. An in-plane pushover test
has been conducted to study the in-plane stiffness of a floor diaphragm. Two one-story
P&B buildings have been tested under biaxial static loads and one-directional seismic loads, respectively. The established test database as well as a test database of a two-story
P&B building provided by a research institute in Japan has been used to verify the “PB3D”
model.
Using the response surface method with importance sampling and considering the
uncertainties involved in seismic ground motions, structural mass, and response surface
fitting errors, seismic reliability analyses have been conducted to estimate the seismic
reliabilities of a series of shear walls, a one-story building and a two-story building.
System effect on the shear wall reliability has also been studied.
The framework presented in this thesis provides a useful tool to assess the seismic
performance of the P&B wood buildings and to aid the performance-based seismic design
of these structural systems.
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Extent |
6063750 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-04-27
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0067194
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
2009-05
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Campus | |
Scholarly Level |
Graduate
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Rights URI | |
Aggregated Source Repository |
DSpace
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Attribution-NonCommercial-NoDerivatives 4.0 International