A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic responses, damage mechanisms and retrofitting methods for deep braced excavation: Centrifuge test and numerical analysis
Abstract The current study investigates the nonlinear seismic responses and damage mechanisms of the deep braced excavation, which has rarely been inspected in previous studies. An effective numerical model is developed based on dynamic centrifuge tests to properly capture the responses and damage of the structure under earthquakes. The model is established by using the nonlinear properties of the material (for both soil and structure) and contact. The procedure of constructing the numerical model including determining the material parameters, boundary conditions, and contact properties is elaborated. The seismic responses of the deep braced excavation during earthquakes with increasing levels of earthquake intensity are clearly investigated and compared with those in the static condition. Then, the damage mechanisms of the structure are stated. Finally, different seismic retrofitting methods are proposed; and, the most effective method is suggested. The findings from this study can provide a clear understanding of the seismic responses, damage mechanisms, seismic retrofitting methods, and also recommendations for seismic design applications of deep braced excavations.
Highlights 3D fully nonlinear numerical model of a deep braced excavation under earthquakes is constructed. Numerical model is developed based on seismic centrifuge tests. Seismic responses, damage mechanisms of the deep braced excavation are investigated. The bottom and middle parts of the deep excavation are sensitive to the earthquake loading compared to the top portion. Different seismic retrofitting methods are presented to mitigate the seismic damage of the deep braced excavation.
Seismic responses, damage mechanisms and retrofitting methods for deep braced excavation: Centrifuge test and numerical analysis
Abstract The current study investigates the nonlinear seismic responses and damage mechanisms of the deep braced excavation, which has rarely been inspected in previous studies. An effective numerical model is developed based on dynamic centrifuge tests to properly capture the responses and damage of the structure under earthquakes. The model is established by using the nonlinear properties of the material (for both soil and structure) and contact. The procedure of constructing the numerical model including determining the material parameters, boundary conditions, and contact properties is elaborated. The seismic responses of the deep braced excavation during earthquakes with increasing levels of earthquake intensity are clearly investigated and compared with those in the static condition. Then, the damage mechanisms of the structure are stated. Finally, different seismic retrofitting methods are proposed; and, the most effective method is suggested. The findings from this study can provide a clear understanding of the seismic responses, damage mechanisms, seismic retrofitting methods, and also recommendations for seismic design applications of deep braced excavations.
Highlights 3D fully nonlinear numerical model of a deep braced excavation under earthquakes is constructed. Numerical model is developed based on seismic centrifuge tests. Seismic responses, damage mechanisms of the deep braced excavation are investigated. The bottom and middle parts of the deep excavation are sensitive to the earthquake loading compared to the top portion. Different seismic retrofitting methods are presented to mitigate the seismic damage of the deep braced excavation.
Seismic responses, damage mechanisms and retrofitting methods for deep braced excavation: Centrifuge test and numerical analysis
Van Nguyen, Dong (author) / Kim, Dookie (author) / Choo, YunWook (author)
2023-02-08
Article (Journal)
Electronic Resource
English
Dynamic Centrifuge Testing of a Temporary Braced Excavation in Dry Sand
| British Library Conference Proceedings | 2014
Braced excavation - Excavation in general
| British Library Conference Proceedings | 2000
Numerical Study on Pile Performances Induced by Adjacent Deep Braced Excavation
| British Library Conference Proceedings | 2018