夏修身, 虞庐松

（兰州交通大学土木工程学院，兰州 730070）

 

［摘要］为提高铁路高墩桥梁的抗震性能，设计了一种新型空心高墩。新型高墩主要由柱与板组成，柱为主体结构，地震中柱始终不坏，板在强震中可以发生损坏。采用二元件模型模拟板，建立其非线性分析模型，采用MIDAS软件对使用柱-板式新型高墩的多跨混凝土连续刚构桥进行了非线性地震反应分析。结果表明，新型高墩在强烈地震作用下通过薄壁板的损伤延长结构周期、耗散地震能量、减小墩柱所受地震作用，能保护桥墩的主体结构。

［关键词］铁路; 新型高墩; 非线性; 二元件模型

中图分类号：U442.55      文献标识码：A      文章编号：1002-848X(2013)10-0064-04

 

Nonlinear analysis on seismic performance of new column-plate tall pier

Xia Xiushen, Yu Lusong

（School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China）

 

Abstract: To improve the seismic performance of the railway bridge with tall piers, a new type of hollow tall pier was proposed. The new tall pier is mainly composed by columns and plates. The columns are the main structure, which always keep elastic under earthquake, while the plates can be damaged in large earthquake. The nonlinear model of the pier was established with two spring model simulating the plate. Nonlinear seismic response analysis of a multi-span concrete continuous rigid frame bridge with the column-plate tall pier was performed by using MIDAS software. The results show that the damage of plates can extend the period of pier, dissipate seismic energy, reduce the seismic action on the pier column, and protect the main structure of the pier under the high intense earthquake.

Keywords: railway; new column-plate tall pier; nonlinear; two spring model

*长江学者和创新团队发展计划资助(IRT1139)。

作者简介：夏修身，副教授，博士，Email:xiaxiushen@mail.lzjtu.cn。

 

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