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夏修身, 虞廬松

（蘭州交通大學(xué)土木工程學(xué)院，蘭州 730070）

 

［摘要］為提高鐵路高墩橋梁的抗震性能，設(shè)計(jì)了一種新型空心高墩。新型高墩主要由柱與板組成，柱為主體結(jié)構(gòu)，地震中柱始終不壞，板在強(qiáng)震中可以發(fā)生損壞。采用二元件模型模擬板，建立其非線性分析模型，采用MIDAS軟件對使用柱-板式新型高墩的多跨混凝土連續(xù)剛構(gòu)橋進(jìn)行了非線性地震反應(yīng)分析。結(jié)果表明，新型高墩在強(qiáng)烈地震作用下通過薄壁板的損傷延長結(jié)構(gòu)周期、耗散地震能量、減小墩柱所受地震作用，能保護(hù)橋墩的主體結(jié)構(gòu)。

［關(guān)鍵詞］鐵路; 新型高墩; 非線性; 二元件模型

中圖分類號：U442.55      文獻(xiàn)標(biāo)識碼：A      文章編號：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

*長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃資助(IRT1139)。

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

 

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