【摘要】 为取得高地震区多跨长联桥梁的合理抗震设计方法及措施,通过郑西客运专线三跨渭河桥,详细阐述了多跨长联桥梁在不同地震条件下抗震设计,经对比分析,客运专线桥梁由于桥墩刚度较大,一般无需进行抗震延性分析,仅按反应谱法进行地震响应分析即可;并通过对桥梁连接构件-抗震榫从其受力机理、结构设计、构件计算等全面研究分析,认为抗震榫为同类桥梁提供了一种全新的抗震措施,同时为抗震榫的设计提供了一种行之有效的方法。更多还原

【Abstract】 To obtain reasonable seismic design methods and measures of the multi-span and long system bridge which is in the high seismic region,the article,citing the three bridges on the Weihe River of Zhengzhou-Xi’an Passenger-dedicated Line as the examples,analyzes the seismic design of the multi-span and long system bridge which is in various earthquake intensity.According to the comparative analysis results,the article thinks that there is no need to do the ductility seismic analysis while only to do the spectrum analysis because of the large rigidity of the pier of passenger-dedicated railway bridge.Further,by researching the aseismatic key which is the connect component from stress mechanism,structural design,component calculation and other aspects,the paper thinks that the aseismatic key can provide a new seismic measure to the similar bridge.The article also provides an effective design method for the aseismatic key.更多还原