Seismic Fragility Assessment for a Newly Developed Buried Arch Bridge

• Published in: KSCE journal of civil engineering Vol. 27; no. 11; pp. 4849 - 4864
• Main Authors: Dang, Phu Van, Huh, Jungwon, Ahn, Jin-Hee, Haldar, Achintya, Kwak, Kiseok
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01.11.2023; Springer Nature B.V; 대한토목학회
• Subjects: Analysis; Arch bridges; Buried structures; Civil Engineering; Deflection; Dynamic analysis; Earthquake damage; Earthquakes; Engineering; Failure mechanisms; Finite element method; Fragility; Geotechnical Engineering & Applied Earth Sciences; High frequency; Industrial Pollution Prevention; Precast concrete; Reinforced concrete; Reinforcing steels; Seismic activity; Seismic response; Steel; Structural Engineering; Three dimensional analysis; 토목공학; Incremental dynamic analysis; Seismic analysis; Earthquake frequency content; Buried arch system; Fragility analysis
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-023-0041-0

This study aims to assess the seismic response of a newly developed buried arch bridge system. The proposed buried arch bridge system is comprised of precast concrete panels, external steel outriggers, and steel V-strips to solve the limitation encountered in the storage, transportation, and construction of traditional buried arch structures. The three-dimensional finite element analysis of this arch system is conducted under dynamic analysis emphasizing the frequency content of earthquakes. Then, the fragility curves are suggested for this arch system based on two damage states defined via incremental dynamic analysis. The results show that this proposed arch system is significantly affected under a high frequency content earthquake compared to the low and intermediate ones. Additionally, the arch system deflects the most at the mid-high position rather than at the arch crown. The deflection at the arch crown or at the mid-high position can be used for establishing the fragility curves as they both connect with the failure mechanism of the arch structure.