- Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Cilt: 39 Sayı: 3
- A Methodology for Fast and Accurate Analytical Fragility Analysis of Linear Structural Systems durin...
A Methodology for Fast and Accurate Analytical Fragility Analysis of Linear Structural Systems during Wind Storms: ALFA
Authors : Cihan Çiftçi
Pages : 508-520
View : 19 | Download : 63
Publication Date : 2023-12-31
Article Type : Research
Abstract :Wind-storms are extremely destructive natural disasters that cause structural damage, and consequently severe personal injuries and casualties. To reduce these injuries and casualties, risk assessment of existing structures and improvement of building design regulations have become important. To assess the risk of structural systems during wind storms, analytical fragility analysis is a recently developed method by providing conditional failure probabilities for the structural systems. However, the analytical fragility analysis requires extensive computational time and effort which makes it infeasible for large scale structures. This proposed paper develops a new methodology (Analytical Linear Fragility Analysis: ALFA) to simplify and to expedite the analytical fragility analysis for linear structural systems without compromising accuracy. ALFA is exemplified by obtaining the fragility curves of 70 different multi-degree of freedom (MDOF) linear mass-column systems subjected to varying wind loading conditions. The fragility curves of the same mass-column systems were also obtained using Monte-Carlo (MC) based brute-force methodology, which is a commonly used computationally expensive method in literature, and results are compared. This comparison yields the conclusion that ALFA is 240 times faster than the brute-force one, without losing accuracy. Moreover, ALFA can be utilized for improvement of performance-based design specifications and for the preliminary risk assessment of nonlinear structural systems.Keywords : Kırılganlık Eğrisi, Monte-Carlo Simülasyonu, Rüzgar Yükü, yapısal güvenilirlik, Yapısal Dinamik