Vulnerability Assessment of Concrete Filled Steel Tube Columns under Multiple Extreme Events: Corrosion and Vehicular Impact

Concrete filled steel tubes are being used in building construction owing to the faster rate of construction, reduced labor requirements, and less material costs. Accidental or intentional vehicle collision with building columns can result in significant damage to these building columns and potentially lead to partial or full collapse of structure. Also the steel tube exposed to atmosphere will be subjected to corrosion. This will further increase the probability of failure. In this study, multi-hazard analysis in the event of corrosion and vehicular impact of concrete filled steel tubes is carried out. A detailed finite element (FE) analysis is conducted in this current study using the LS-DYNA package. FE models for truck is used from National Crash Analysis Center and the National Transportation Research Center. The concrete filled steel tube models are first validated with the experimental results by comparing the impact force time history and maximum deflection. To account for corrosion, the material loss in steel tube is first considered uniform throughout the height of column. Secondly, stochastic fields for steel tube thickness are generated to account for non-uniform corrosion along the height of column. The impact analysis is performed for different truck impact velocities. The vulnerability of the concrete field steel tube columns under the expected impact loads is assessed by calculating impact force and its lateral load capacity at the impact location. A damage index is proposed to under the vulnerability of CFST columns under vehicle impact and corrosion. The analysis results for FE models with and without corrosion are compared. It is believed that the results from this study will help in improving the design of such structural members.


  • English

Media Info

  • Media Type: Web
  • Edition: 1st Edition
  • Pagination: pp 224-235
  • Monograph Title: Structures Congress 2018: Blast, Impact Loading, and Response; and Research and Education

Subject/Index Terms

Filing Info

  • Accession Number: 01874603
  • Record Type: Publication
  • ISBN: 9780784481349
  • Files: TRIS, ASCE
  • Created Date: Feb 24 2023 3:17PM