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http://dx.doi.org/10.4334/JKCI.2010.22.5.667

Response Analysis of RC Bridge Pier with Various Superstructure Mass under Near-Fault Ground Motion  

Park, Chang-Kyu (Dept. of Civil & Environmental Engineering, Chung-Ang University Seoul)
Chung, Young-Soo (Dept. of Civil & Environmental Engineering, Chung-Ang University Seoul)
Lee, Dae-Hyung (Dept. of Civil & Environmental Engineering, Chung-Ang University Seoul)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.5, 2010 , pp. 667-673 More about this Journal
Abstract
The near fault ground motion (NFGM) is characterized by a single long period velocity pulse with large magnitude. NFGMs have been observed in recent strong earthquakes, Northridge (1994), Japan Kobe (1995), Turkey Izmit (1999), China Sichuan (2008), Haiti (2010) etc. These strong earthquakes have caused considerable damage to infrastructures because the epicenter was close to the urban area, called as NFGM. Extensive research for the far field ground motion (FFGM) have been carried out in strong seismic region, but limited research have been done for NFGM in low or moderate seismic regions because of very few records. The purpose of this research is to investigate and analyze the seismic response of reinforced concrete bridge piers subjected to near-fault ground motions. The seismic performance of six RC bridge piers depending on three confinement steel ratios and three superstructure mass was investigated on the shaking table. From these experimental results, it was confirmed that the reduction of seismic performance was observed for test specimens with lower confinement steel ratio or more deck weight. The displacement ductility of RC bridge piers in terms of the stiffness degradation is proposed based on test results the shaking table.
Keywords
RC bridge pier; seismic response; superstructure mass; near-fault ground motion; shaking table test;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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