CAJ | 학술논문

随着公路桥梁的建设和隔震技术的发展,近断层隔震桥梁的抗震性能研究十分必要.以一座简支微弯梁桥为例,通过非线性时程的方法,探讨简支梁桥在近场地震作用下桥梁的减隔震特性及参数变化规律.分析结果表明,该隔震简支梁桥在近场地震作用下,墩底弯矩和支座位移比远场地震作用下大;采用隔震技术后,在近场地震作用下,减震效果仍有效;纵横向支座位移随屈服强度的增加而减小,且均有随初始刚度增加而减小的趋势;墩底弯矩因波脉冲不同和各墩刚度不一,随初始刚度和屈服强度的变化不一.
수착공로교량적건설화격진기술적발전,근단층격진교량적항진성능연구십분필요.이일좌간지미만량교위례,통과비선성시정적방법,탐토간지량교재근장지진작용하교량적감격진특성급삼수변화규률.분석결과표명,해격진간지량교재근장지진작용하,돈저만구화지좌위이비원장지진작용하대;채용격진기술후,재근장지진작용하,감진효과잉유효;종횡향지좌위이수굴복강도적증가이감소,차균유수초시강도증가이감소적추세;돈저만구인파맥충불동화각돈강도불일,수초시강도화굴복강도적변화불일.
Based on the nonlinear dynamic time history analysis,a slightly curved simple supported isolated bridge is studies,to investigate the characteristic and the rule of parameters of the lead rubber bearing ( LRB).Results show that the moment at the bottom of piers and the displacements of LRB to near fault earthquake ground motions are larger than those to far fault earthquake ground motions.It is efficient to reduce the response of isolated bridge to the near fault earthquake ground motions by isolation technology.The bearing displacement decreases with the increment of the initial stiffness and the yielding strength,while the moment at the bottom of the pier varies with the change of the different stiffness and pulse types.