This paper examines the pounding problem between adjacent decks subjected to strong earthquakes. The elastomeric bearings in an isolated bridge reduce the stresses on the superstructure and cushion the impact by transferring smaller seismic forces to the substructure. On the other hand, these bearings also allow large horizontal displacement of the superstructure due to seismic forces. Bridges having various supporting soil conditions and different frequency ratios between adjacent decks are investigated by numerical analysis. In the analysis, decision making is conducted whether the collision took place or not and, the magnitude of pounding force and the duration time of collision are obtained and the results are discussed.

• 강승우(동아대학교 토목공학과) | Kang, Seung Woo
• 최광규( 동아대학교 토목공학과) | 최광규
• 배병호( 한국시설안전공단) | 배병호
• 고재상( 한국시설안전공단) | 고재상