نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Aboveground steel liquid storage tanks are essential components of oil, gas, and petrochemical facilities, and their seismic performance plays a key role in operational safety and service continuity following earthquakes. A major source of seismic vulnerability in these systems is the absence of anchorage between the tank base and the foundation, which can lead to uplift, local shell buckling, and potential leakage. This study evaluates the efficacy of mechanical anchorage in enhancing the seismic resilience of aboveground steel storage tanks
A comparative seismic assessment was carried out for the anchored and unanchored configurations of the tank subjected to earthquake hazard levels corresponding to return periods of 75, 475, and 975 years. The analysis focused on structural damage, operational stability, functional performance, and post-earthquake recovery capacity in order to assess the effectiveness of anchorage as a retrofitting strategy.
The results showed that at the 75-year hazard level, the seismic response of the anchored and unanchored tanks was generally similar. At the 475-year hazard level, the unanchored tank experienced a 4% to 6% reduction in functional performance, while the anchored tank maintained stable operation. At the 975-year hazard level, the unanchored tank suffered severe structural damage with poor economic reparability, whereas the anchored tank remained in a recoverable state and was able to regain its initial functionality after repair.
Mechanical anchorage significantly improves the seismic resilience of aboveground steel liquid storage tanks by reducing uplift-induced damage, preserving operational performance, and enhancing post-earthquake recoverability, especially under moderate to severe seismic hazard levels.
کلیدواژهها English
