Dynamic Failure Experimental Study of a Gravity Dam Model on a Shaking Table and Analysis of Its Structural Dynamic...

Area of Science:

• Civil Engineering
• Earthquake Engineering
• Structural Dynamics

Background:

• Seismic safety of concrete gravity dams is critical.
• Understanding dynamic response and failure modes under seismic loads is essential.
• Shaking table testing is a key method for studying dam behavior.

Purpose of the Study:

• To investigate the dynamic response and failure modes of a concrete gravity dam model under seismic loading.
• To analyze the relationship between damage progression and dynamic characteristic parameters.
• To provide insights for seismic safety evaluations and damage diagnosis methods.

Main Methods:

• A concrete gravity dam model was constructed using specialized emulation concrete.
• Dynamic shaking table tests were performed under various operational conditions.
• Dynamic strain and acceleration responses were recorded and analyzed.

Main Results:

• Damage progression was tracked using dynamic strain responses.
• Dynamic characteristic parameters (acceleration amplification, response spectra, modal parameters) were identified.
• A correlation between damage development and identified dynamic parameters was established.

Conclusions:

• The study provides valuable insights into conducting and interpreting gravity dam shaking table experiments.
• Identified dynamic parameters are sensitive to damage levels.
• Findings support structural dynamic characteristic identification and damage diagnosis for gravity dams.