Pounding Analysis of Isolated Girder Bridge under Nonpulse and Pulse-Like Earthquakes
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 4
Abstract
Pounding damages are frequently encountered in concrete continuous girder bridges during strong earthquakes. In the evaluation of pounding responses, the simplified lumped mass model with the contact element are usually adopted. However, the pounding responses calculated based on the simplified model are often significantly different from the real results, because the simplified model fails to consider the details of pounding processes and ignores concrete damage. In addition, the seismic parameters (e.g., peak ground acceleration, peak ground velocity) affects the pounding responses greatly. To further enhance the aforementioned considerations, this study presents the longitudinal pounding analysis of an isolated continuous girder bridge subjected to the unidirectional ground motions based on a multiscale simulation scheme. The pounding between the bridge and side abutments was simulated with a contact algorithm, and the concrete damages were considered. Thirty-three nonpulse and thirty-three pulse-like real ground motions were selected as seismic excitations to investigate the effects of seismic properties on pounding responses. Two pounding patterns were recognized and found to be related to the V-shaped velocity segment of the seismic input. Correlation coefficient and semipartial correlation coefficient were used to analyze the relationship between the seismic parameters and corresponding pounding responses.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors would like to acknowledge the support from the Natural Science Foundation of Jiangsu Province (Grant No. BK20190359), the National Natural Science Foundation of China (51578151 and 51438002) and the Scientific Research Foundation of Graduate School of Southeast University (YBPY1966).
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 4 • August 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 5, 2019
Accepted: Feb 6, 2020
Published online: May 11, 2020
Published in print: Aug 1, 2020
Discussion open until: Oct 11, 2020
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