Deming Zhu

The Hong Kong Polytechnic University | PolyU · Department of Civil and Environmental Engineering

Coastal bridges are susceptible to severe damage when subjected to successive earthquake-tsunami events. Previous studies mainly consider the tsunami loadings as hydrodynamic forces, whereas other hydrodynamic forces such as uplift and slamming forces, are not fully investigated. Moreover, there are limited studies on the dynamic performance of sim...

Simply supported bridges comprise the majority of bridge systems in coastal communities and are susceptible to severe damage from extreme waves induced by storms or tsunamis. However, the effects of oblique wave impacts have been less investigated due to the lack of appropriate numerical models. To address this issue, this study investigates the ef...

Climate change could result in more extreme weather events and induce increasing challenges to the low-lying coastal bridges. The structural performance of box-girder bridges under wave impacts was seldom investigated. In this paper, a three-dimensional (3D) computational fluid dynamics (CFD) model is established to simulate the wave-bridge interac...

Coastal bridges are crucial components of transportation systems; however, they are susceptible to increasing failure risk from extreme waves due to climate change scenarios. Previously, most of the studies focused on the extreme wave forces on the bridge superstructure, while the effects of the overturning moment, bearing constraints, and local da...

Coastal bridges serve as lifelines in evacuation and rescue after coastal natural 6 hazards. It is thus vital to reveal the spatial failure mechanism for coastal bridges under extreme 7 waves. In this study, a high-efficient pseudo-fluid-structure interaction (PFSI) solution scheme 8 is proposed to investigate the spatial failure mechanism of coast...

This paper proposes a comprehensive framework for performance and reliability analyses of coastal bridges under hurricane surge and waves, including a three-dimensional (3D) Computational Fluid Dynamics (CFD) model to simulate the wave-structure interaction, laboratory experiments to improve the model accuracy, a 3D Finite Element Model (FEM) to ev...

Coastal highway bridge is an essential component of the transportation system but threatened by natural hazards such as hurricanes. Damaged highway bridges result in not only transportation disruption, but also tremendous financial, societal, and life loss. Therefore, vulnerability and loss assessments of bridges under hurricane events are becoming...

This paper proposes a comprehensive analysis framework, combining three-dimensional (3D) numerical modelling and metamodeling, to investigate the probabilistic performance of retrofit actions on coastal bridges subjected to extreme wave forces. Specifically, a 3D Computational Fluid Dynamics (CFD) model is developed to calculate extreme wave load o...

Coastal civil infrastructure can be susceptible to damages caused by hurricanes throughout its service life. Vulnerability assessment is a key component in hazard risk management of civil infrastructure systems. Previously, most studies assume storm parameters are independent when computing the vulnerability of infrastructure to hurricanes. Due to...

In this paper, solitary wave-induced vertical and horizontal forces on coastal bridges are investigated by laboratory experiments as well as computational fluid dynamics (CFD) analysis. The effects of different parameters (e.g., water depths, submergence depths, wave heights) on wave-induced force on a 1:30 scale bridge model are studied. Specifica...