Developing a Resilience Index for the Pile-Supported Piers of the Port of Batangas under Tsunami Load
Publication: Natural Hazards Review
Volume 24, Issue 2
Abstract
The roll-on/roll-off (ro-ro) transport system, which plays a huge role in the transportation and economy of the Philippines, mainly uses piers to provide smooth berthing of ships. However, its structural configuration attracts different hazards causing damage, particularly to piles. Tsunamis produce devastating wave forces. This may heavily result in discontinuity of the whole port operation as there will be no available berthing structure for ships. Hence, this study was conducted to determine the structural resilience of the pile-supported piers of the Port of Batangas against tsunami loads at different variations of wave height and water depth. Structural software was used to model the piers and incorporate calculated tsunami drag forces. Furthermore, pushover analysis was performed to produce the base shear versus displacement curves needed for the calculation of the robustness index. The rapidity index, on one hand, is based on an interview with the Philippine Ports Authority - Port Management Office (PPA-PMO) of Batangas resulting in recovery rates for demolition works and pile replacement. Combining these indices using the concept of resilience triangle, values of the resilience index ranging from 0.0 to 1.0 were calculated at both longitudinal and transverse directions. As a result, the piers were categorized as highly resilient in almost 50% of the tsunami load cases. It proved that the pier with existing batter piles exhibits higher resilience than the other which is only supported by vertical piles.
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Data Availability Statement
Some or all data and models that support the findings of this study are available from the corresponding author upon reasonable request. These include structural plans, survey results, and recorded interviews.
Acknowledgments
The authors would like to express their deepest appreciation to the PPA-PMO of National Capital Region-South for providing the structural plans of the Port of Batangas and the PPA-PMO of Batangas for giving sufficient information through survey and interview. The authors’ contributions are as follows: JAST, LEOG, and MPDL were in charge of the writing and overall supervision of the study, TS was responsible for supervising the flow of the research work at Waseda University. Each author had participated sufficiently in the work to take public responsibility for appropriate portions of the content. All authors read and approved the final manuscript.
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Published In
Natural Hazards Review
Volume 24 • Issue 2 • May 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Nov 16, 2021
Accepted: Aug 16, 2022
Published online: Jan 19, 2023
Published in print: May 1, 2023
Discussion open until: Jun 19, 2023
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