NEHRP Clearinghouse
- Title
- Experimental Investigation of Blast Performance of Seismically Resistant Concrete-Filled Steel Tube Bridge Piers.
- File
- PB2008105143.pdf
- Author(s)
- Fujikura, S.; Bruneau, M.; Lopez-Garcia, D.
- Source
- Federal Highway Administration, Washington, DC.; National Science Foundation, Arlington, VA. Earthquake Engineering Research Centers Program., April 20, 2007, 216 p.
- Identifying Number(s)
- MCEER-07-0005
- Abstract
- The objective of this research is to develop and validate a multi-hazard bridge pier concept. A multi-column pier-bent with concrete-filled steel tube (CFST) columns is investigated experimentally to assess the adequacy of such a system under blast loading. This report describes the development of the multi-hazard pier concept, design of the prototype bridge pier under blast and seismic loading, specimen design, experimental set-up, and experimental results. Additionally, the results from the blast experiments are compared with the results from simplified method of analysis considering an equivalent SDOF system with elastic-perfectly-plastic behavior. It is found that the prototype bridge CFST columns can be designed to provide both satisfactory seismic performance and adequate blast resistance. It is also shown that the CFST columns exhibit ductile behavior under blast load in a series of tests at 1/4 scale. Maximum deformation of the columns was calculated using simplified analysis considering a factor to account for the reduction of pressures on the circular column and determined from this experimental program.
- Keywords
- ; Seismic design; Bridges; Deformation; Steel structures; Columns (Supports); Investigations; Blasting; Concrete structures; Earthquake engineering