- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- A comparison of two hysteretic models in predicting...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
A comparison of two hysteretic models in predicting the response of a connector under cyclic loading Lo, Yvonne P. Y.
Abstract
The effect of seismic loading on structures has become a main concern due to the number of collapses or incidents of substantial damage during recent earthquakes. The inelastic behavior of a fastener under seismic loading is a determinant factor of the response of the whole structure; hence, the dynamic behaviour of the fasteners is a main issue for study. The objective of this research is to compare the response of a fastener predicted by a finite-element model (HYST) and the empirical Bouc-Wen-Baber-Noori model (BNW). HYST is a mechanics-based model that uses material properties of the fastener and the characteristics of its surrounding medium to predict the response. BNW is a mathematical model involving 13 parameters. The hysteretic results calculated by this model are obtained by integration of a first order differential equation, given a displacement history A(t). The BNW parameters are calibrated using the response to a particular cyclic displacement history, and then the responses are evaluated for other different histories or seismic excitations. Results are compared to the corresponding HYST outputs. The results show that BNW gives comparable values for relative maximum displacements with respect to the medium, and restoring forces when the response of the structure remains elastic. However, the discrepancies increase with nonlinearities, and the model cannot accurately predict, for example, the residual deformations.
Item Metadata
Title |
A comparison of two hysteretic models in predicting the response of a connector under cyclic loading
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
2002
|
Description |
The effect of seismic loading on structures has become a main concern due to the number
of collapses or incidents of substantial damage during recent earthquakes. The inelastic behavior
of a fastener under seismic loading is a determinant factor of the response of the whole structure;
hence, the dynamic behaviour of the fasteners is a main issue for study. The objective of this
research is to compare the response of a fastener predicted by a finite-element model (HYST)
and the empirical Bouc-Wen-Baber-Noori model (BNW).
HYST is a mechanics-based model that uses material properties of the fastener and the
characteristics of its surrounding medium to predict the response. BNW is a mathematical model
involving 13 parameters. The hysteretic results calculated by this model are obtained by
integration of a first order differential equation, given a displacement history A(t).
The BNW parameters are calibrated using the response to a particular cyclic
displacement history, and then the responses are evaluated for other different histories or seismic
excitations. Results are compared to the corresponding HYST outputs. The results show that
BNW gives comparable values for relative maximum displacements with respect to the medium,
and restoring forces when the response of the structure remains elastic. However, the
discrepancies increase with nonlinearities, and the model cannot accurately predict, for example,
the residual deformations.
|
Extent |
2475163 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2009-09-22
|
Provider |
Vancouver : University of British Columbia Library
|
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.
|
DOI |
10.14288/1.0063650
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
2002-11
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
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.