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http://dx.doi.org/10.5000/EESK.2018.22.3.103

Seismic Damage to RC Low-rise Building Structures Having Irregularities at the Ground Story During the 15 November 2017 Pohang, Korea, Earthquake  

Hwang, Kyung Ran (School of Civil, Environmental, and Architectural Engineering, Korea University)
Lee, Han Seon (School of Civil, Environmental, and Architectural Engineering, Korea University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.22, no.3, 2018 , pp. 103-111 More about this Journal
Abstract
This study examines the seismic failure of RC low-rise building structures having irregularities at the ground story during the 15 November 2017 Pohang, Korea, earthquake, $M_w=5.4$, which is the second strongest since the government began monitoring them in 1978 in South Korea. Some 2,000 private houses were damaged or destroyed in this earthquake. Particularly, serious damage to the piloti story of RC low-rise residential building structures of fewer than five stories was observed within 3 km of the epicenter with brittle shear failure of columns and walls due to severe torsional behavior. Buildings below six stories constructed before 2005 did not have to comply with seismic design requirements, so confinement detailing of columns and walls also led to inadequate performance. However, some buildings constructed after 2005 were damaged at the flexible side of the piloti story due to the high torsional irregularity. Based on these results, this study focuses on the problems of the seismic torsion design approach in current building codes.
Keywords
Seismic design Seismic damage; Torsion; Irregularity; Pohang earthquake; Reinforced concrete; Low-rise building;
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Times Cited By KSCI : 2  (Citation Analysis)
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