NDLI: Comparison of the Seismic Performance of Reinforced Concrete and Concrete Filled Steel Tube Bridges

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Comparison of the Seismic Performance of Reinforced Concrete and Concrete Filled Steel Tube Bridges

Content Provider	Semantic Scholar
Author	Stephens, Miles T. Roeder, Charles W.
Copyright Year	2017
Abstract	Past earthquakes have resulted in significant damage to reinforced concrete (RC) highway bridge columns. Concrete filled steel tube (CFST) bridge columns have been introduced as an economical alternative to traditional RC columns, since they permit accelerated construction, reduce cost with smaller column diameter and material requirement, and superior inelastic seismic performance. To further explore the potential benefit of CFST bridges, a side-by-side comparison of the seismic performance of these two structural systems, RC and CFST, is made including damage and collapse potential using performance-based earthquake engineering (PBEE) tools. These tools include nonlinear analysis methods to capture the full cyclic inelastic response of the structural system, probabilistic-based functions to quantify the likelihood of damage and reparability, and incremental dynamic analyses (IDAs) to evaluate collapse potential. The comparison is made using a RC highway bridge in the US State of Washington as the case-study structure; the bridge was re-designed using CFST bridge columns with the objective of having the same stiffness and flexural strength. The RC and CFST structures were subjected to a suite of crustal ground motions scaled to represent serviceability (10% probability of exceedance in 50 years), design (7% probability of exceedance in 75 years), and maximum considered (2% probability of exceedance in 50 years) seismic hazard levels. Fragility curves were used to compare the performance of the structures in terms of damage state, and IDAs were used to compare damage and collapse potential. The results show that the CFST structure is more resilient than the RC structure by all measures.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://db.nzsee.org.nz/2017/O4C.5_Stephens.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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