【摘要】 为了研究S形曲线梁桥在地震作用下的动力响应及抗震性能,设计并制作一座相似比为1/20的S形曲线梁桥进行振动台试验研究。结果表明:在地震作用下,S形曲线梁桥的梁体未有明显损伤,桥墩出现裂缝,支座破坏严重;在墩底屈服之前,墩梁已发生较大相对位移,桥梁极易发生落梁破坏现象;桥墩在大震作用下的扭转耗能作用十分明显。在振动台试验基础上,对S形曲线梁桥提出一种"梁体漂浮抗震设计"的概念设计方法,为该类桥梁的抗震设计理论提供支持。更多还原

【Abstract】 In order to study the dynamic response and the seismic performance of the S-shaped curve bridge,a 1/20 scale model of S-shaped curve bridge was designed and fabricated for shaking table test.Test results show that,during the earthquake,the beam of S-shaped curved bridge had no significant damage.However,some cracks appear in the piers,and the bearings was damaged seriously.Before the pier yield period,pier and beam has a larger relative displacement.The phenomenon of beam falling occurs easily andthe piers under earthquake reverses twist energy very obvious.On the basis of shaking table test,a conceptual design which called"beam floating seismic design"was proposed to make a foundation for this kind of bridge seismic design theory.更多还原