高墩大跨连续刚构桥P-△效应分析  

Large span Continuous rigid Structural Bridge P-delta Effect Analysis

作　　者：谢敬之 XIE Jingzhi(China Design Group co.,LTD.,Nanjing Jiangsu 210032,China)

机构地区：[1]中设设计集团股份有限公司,江苏南京210032

出　　处：《交通节能与环保》2018年第4期102-104,共3页Transport Energy Conservation & Environmental Protection

摘　　要：高墩在纵向水平地震力作用下产生水平变位,从而使作用在墩顶上的上部结构的重力荷载以及墩身自身的重力荷载产生了偏心,在桥墩内将引起二次内力和变形(称P-△效应)。本文分别采用对比的方法及不同的桥墩参数,对桥墩的P-△特性进行比较研究,得出一些有意义的结论,为抗震设计和计算提供一些参考和借鉴。the high pier in the longitudinal seismic force under the action of horizontal displacement,so that the gravity load of the structure in the upper portion of the pier top and pier's own gravity load produced eccentric,within the bridge will cause secondary internal force and deformation(called a P-delta effect).This paper adopts the method of comparison and different parameters of pier,a comparative study on characteristics of bridge pier of P-delta,some meaningful conclusions,and provides some references for the seismic design and calculation and using for reference.

关 键 词：桥梁工程 P-△效应 重力荷载 长细比 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]