Advanced non-linear analysis of concrete gravity dams under multi-directional ground motions

• Published in: Journal of building pathology and rehabilitation 2025-06, Vol.10 (1), Article 39
• Main Authors: Zine, Ali, Guettala, Salah, Khelaifia, Akram, Kadid, Abdelkrim
• Format: Article
• Language: English
• Subjects: Building Materials; Building Repair and Maintenance; Energy Efficiency; Engineering; Engineering Thermodynamics; Heat and Mass Transfer; Research Article; Structural Materials
• ISSN: 2365-3159; 2365-3167
• DOI: 10.1007/s41024-024-00546-9

Seismic risk assessment is inherently complex, involving the integration of seismic analysis, structural vulnerability, and socio-economic impacts of earthquakes. This study presents findings from a non-linear seismic analysis of concrete gravity dams, a critical aspect given the extensive experience of existing dams with significant seismic activity. Utilizing ADINA software, we simulated the dynamic behavior of a concrete gravity dam under various seismic conditions. The study specifically addresses the impact of vertical ground motions on the seismic response and crack development within the dam body. We conducted a non-linear dynamic analysis incorporating both horizontal and combined horizontal plus vertical accelerations, with the foundation assumed to be rigid and fluid–structure interaction modeled using Westergaard’s concept of added mass. The smeared cracking model was employed to simulate crack initiation and propagation. Key parameters evaluated include displacements, modal characteristics, and crack patterns. The results provide valuable insights into the expected behavior of concrete gravity dams during future seismic events and highlight the importance of considering both the dynamic characteristics and frequency content of ground motions for accurate seismic safety assessment.