@article {bnh-7881, title = {Development of fragility functions for rigid-frame bridges subjected to tsunami-induced hydrodynamic forces}, journal = {Structure and Infrastructure Engineering}, year = {2021}, month = {03/2021}, abstract = {

The rigid-frame bridges with a fully continuous moment connection between the superstructure and substructure piers are suitable for high-seismic regions; however, research on the response of these bridge types under tsunami loads is limited. This paper presents a framework for developing fragility functions of coastal rigid-frame bridges, and bridges with strong pier-to-deck connectivity, undergoing tsunami-induced hydrodynamic loads. The fragility analysis is demonstrated on a three-span reinforced concrete (RC) bridge structure with double-column bents. The Monte Carlo simulation is implemented to consider the uncertainties in capacity and demand parameters. The efficiency of single-parameter and two-parameter intensity measures for predicting the response of bridges is examined. The viability of strengthening bridge piers using fiber-reinforced polymer (FRP) is also investigated. The results indicate that the use of two-parameter intensity measures is a better option to estimate the structural response since the hydrodynamic forces are a function of both the flow depth and velocity. This also leads to a significant reduction in the scatter of fragility data. The comparative assessment of the initial and FRP-strengthened bridges highlights that the FRP-jacketing is an effective method in reducing the risk of failure of the rigid-frame bridges.

}, keywords = {Coastal bridges, fiber-reinforced polymers, fragility model, hydrodynamic loads, numerical simulations, strengthening, structural safety, tsunami}, doi = {https://doi.org/10.1080/15732479.2021.1892774}, url = {https://www.tandfonline.com/doi/full/10.1080/15732479.2021.1892774}, author = {Ismail Qeshta and Javad Hashemi and M. Reza Hashemi and Rebecca Gravina and Sujeeva Setunge} } @article {bnh-5381, title = {Review of resilience assessment of coastal bridges to extreme wave-induced loads}, journal = {Engineering Structures}, volume = {185}, year = {2019}, month = {04/2019}, chapter = {332}, abstract = {

Coastal bridges are susceptible to severe damage due to wave-induced forces during\ extreme events\ such as\ coastal flooding, hurricanes,\ storm surges\ and\ tsunamis. As a direct impact of\ climate change, the frequency and intensity of these events are also expected to increase in the future. This paper presents a comprehensive review of a four-phase resilience assessment of coastal\ bridge structures, namely, (i)\ characterization\ of external wave-induced forces, (ii)\ structural response\ of bridges, (iii) vulnerability assessment of damaged components, and (iv) post-disaster recovery. The four comprehensive modules are adopted from the classic framework of PEER PBEE and constitute the\ integrated knowledgeneeded for the prediction of the resilience of infrastructure under extreme wave-induced loads. The study also presents new expressions for resilience restoration that simultaneously account for the time, resources (cost) and\ environmental impacts\ of different recovery options with variable importance levels to different stakeholders.

}, doi = {10.1016/j.engstruct.2019.01.101}, url = {https://www.sciencedirect.com/science/article/pii/S0141029618318194}, author = {Ismail Qeshta and Javad Hashemi and Rebecca Gravina and Sujeeva Setunge} }