1 Assistant Professor, Department of Civil Engineering, Babol University of Technology, Babol, Iran
2 M.S. Students, Department of Civil Engineering, Babol University of Technology, Babol, Iran
Online published on 7 February, 2013.
Near-fault earthquake motions have special characteristics that affect the response of structures. Their importance in earthquake design of civil structures was not fully realized until several failures occurred during the 1994 Northridge and 1995 Kobe earthquake events. The objective of this study is to investigate the effect of near fault and far fault earthquake motions on the response of reinforced concrete structures considering soil-structure interaction. In detail, a series of linear time-history analysis was carried out for three example buildings. The effects of soil-structure interaction were evaluated for a 3-story building, a 7-story building and a 15-story building. The ordinary moment resisting frame system was considered for all example buildings as lateral force-resisting system. For all buildings time-history analysis were performed under 3 example earthquake motions: Tabbas, Kobe and Loma Prieta. The buildings were supported on soft and stiff soils with 100m/s and 900m/s shear wave velocity respectively. For each building and earthquake record, analysis were carried out for both conditions, building supported on soft and stiff soil separately, and compared with fixed base results. For all analysis both near-field and far-field earthquake were considered. The main evaluated parameters were period of structure, base shear, global displacement and story drifts. Results based on linear time-history analysis had shown that considering the soil-structure interaction increases period of structure and story drifts and also had noticeable and significant effects on global displacement and base shear.
Soil-structure interaction, Reinforced concrete buildings, Near and far fault Earthquake
