Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Development of the seismic fragility curve of the bridge Pier after Vehicle Collision

Document Type : Original Article

Authors
Amar Kor 1
Hamidreza Tavakoli 2
Sepideh Rahimi 1
Mohamad Hosianzadeh 1
1 Department of Civil Engineering, Nour Branch Islamic Azad University, Nour, Iran
2 Professor, Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
10.22065/jsce.2024.488094.3569
Abstract
The possibility of an accident or collision with bridges on a daily basis is not far from expected, and in many cases, it was observed that after the collision with the foundations of the bridge, the necessary investigations were carried out to evaluate and improve the seismicity of such bridges. It cannot and may collapse suddenly under the influence of an earthquake with a certain intensity. In this research, an overpass sample has been implemented, investigated and evaluated. First, a truck at variable speeds of 80, 100, and 120 km/h along with a selected bridge sample to extract force-time diagram in LS-DYNA simulation software, and then the bridge under study in OPENSEES modeling software and force-time diagram along with 19 earthquake records were applied to it. After the incremental dynamic analysis (IDA) in a non-linear way, the fragility curves resulting from the analysis were drawn and the probability of passing through different limit states was calculated. It was found that the effect of the impact causes permanent deformations in the foundations of the bridge, and this increases the process of destruction of the foundations after applying the acceleration of the earthquake at a speed of 80 km, but at speeds of 100 and 120 km, the increasing trend has had a significant difference compared to the non-impact state and it can be said that speed change plays a significant role in increasing failure. The results show that the probability of passing 50% of the full surface in non-collision modes, collisions with speeds of 80, 100 and 120 have occurred at maximum accelerations of 1.6, 1.5, 1.2 and 1 times the acceleration of gravity.
Keywords
Collision
earthquake accelerometer
IDA analysis
fragility curve
vulnerability
bridge

Subjects

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Journal of Structural and Construction Engineering
Volume 12, Issue 06 - Serial Number 95
September 2025
Pages 98-119

  • Receive Date 12 November 2024
  • Revise Date 04 December 2024
  • Accept Date 07 December 2024