Seismic Response of Midrise Light Wood-Frame Buildings with Portal Frames
Publication: Journal of Structural Engineering
Volume 140, Issue 8
Abstract
The seismic response of midrise light wood-frame buildings incorporating portal frames and shear walls were investigated via numerical simulation. Because portal frames and shear walls exhibit different ductility characteristics, of specific interest in this paper is the seismic force-modification factor for the combined building system. An approach to estimate the ductility-related force-modification factor, , for the hybrid light wood-frame building containing two types of lateral load-resisting systems with different was proposed. One-, four-, and six-story buildings with layouts that rely on shear walls only or a combination of shear walls and portal frames were designed using the estimated from the proposed approach. Frequency and nonlinear time history analyses were performed on these multistory hybrid buildings using a modified macro element model to represent the lateral-resistant element in finite-element program, ABAQUS. The results show that the use of a value higher than the lowest factor of the two lateral load-resisting systems is justified.
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Acknowledgments
The authors greatly acknowledge the financial support provided by Natural Sciences and Engineering Research Council (NSERC) of Canada under the Strategic Research Network on Innovative Wood Products and Building Systems (NEWBuildS). Thanks are also extended to FPInnovations for providing the test results of portal frames.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 8 • August 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 21, 2012
Accepted: May 24, 2013
Published online: May 27, 2013
Discussion open until: May 13, 2014
Published in print: Aug 1, 2014
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