摘要
A型高墩大跨混凝土连续刚构桥的显著特点是墩高、跨度大、梁体及墩身质量巨大。文章分析了P-Δ效应、行波效应对A型高墩大跨混凝土连续刚构桥地震反应的影响及弹塑性地震反应特点,探讨了A型高墩大跨混凝土连续刚构桥的延性抗震设计方法。结果表明:A型高墩连续刚构桥按有限延性的抗震设计比较合理,P-Δ效应对A型高墩大跨连续刚构桥地震反应的影响较小,设计中可以忽略;行波效应对A型高墩大跨连续刚构桥地震反应的影响应结合具体的桥型、桥址场地类别,选取合理的地震动、恰当的行波速度进行分析。
Remarkable characteristics of A type high pier and long span concrete continuous rigid frame bridge are high pier, larye span, massive girder and pier. This paper analyzes the influence of P-delta effect, the traveling wave effect on the A type high pier and long-span continuous rigid frame bridge seismic response of concrete and elastic plastic re-sponse characteristics of earthquake, it also discusses the seismic ductility design method of A type high pier and long span concrete continuous rigid frame bridge. The results showed that： A type continuous rigid frame bridge with high piers on seismic design limited ductility is reasonable, P-delta has little effect on type A high pier and long-span continu-ous rigid frame bridge’s response in earthquake, which cauld be ignared in design; traveling wave effect on the A type high pier and long-span continuous rigid frame bridge response earthquake should be combined with a specific type of bridge and bridge site selection. Reasonable seismic wave velocity and proper travelling wave speed should be selected in analysis. The research could sexve as a reference for high pier and long-span Railway Bridge design.
出处
《高速铁路技术》
2014年第6期21-25,共5页
High Speed Railway Technology
基金
铁道部重点课题<新线建设关键技术研究-A型高墩大跨度混凝土连续刚构桥设计技术研究>(2010G016-D)
关键词
A型高墩
刚构桥
地震反应
有限延性
a type high pier
rigid frame bridge
seismic response
limited ductility
