摘要
以在建的黄韩侯铁路线上纵目沟特大桥为工程背景,建立相应的有限元模型,利用反应谱法重点分析了在竖向地震作用下新型柱板式高墩的P-Δ效应影响规律,同时引入稳定指标定量分析了P-Δ效应的放大效果。结果表明,在同时考虑到竖向地震作用和P-Δ效应之后,柱板式桥墩的位移和内力有明显增大,这种影响随着墩高的增加而加强,可以用稳定指标来进行表示。
Taking the Zongmugou bridge of Huang-Han-Hou railway line as an engineering background ,the correspond-ing finite element model is established ,and by using the response spectrum method ,the influence law for P - Δ effect of the new column-plate-typed high piers under vertical earthquake action is analyzed emphatically ,at the same time ,the stability index is introduced to quantitatively analyze the amplification effect of P - Δ effect .The results show that after taking into account the vertical seismic action and P - Δ effect ,the column-plate-typed pier’s displacement and internal force have significantly increased ,and the effect would increase with the increasing of pier’s height ,which could be rep-resented by the stability index .
出处
《水利与建筑工程学报》
2014年第2期76-79,共4页
Journal of Water Resources and Architectural Engineering
关键词
柱板式高墩
竖向地震作用
P-Δ效应
稳定指标
column-plate-typed high pier
vertical earthquake action
P - Δ effect
stability index
