铁道科学与工程学报2016，Vol.13Issue(12)：2381-2387,7.
青藏高速公路路基地震动力响应分析
Seis mic dyna mic response analysis of e mbankment along the Qinghai-Tibet Expressway
摘要
Abstract
The artificial earthquake waves with the exceeding probability for 63.5%,10%and 2%in 50 years related to this areas were established to study the dynamic response characteristics of proposed Qinghai-Tibet Ex-pressway under seismic loading.Based on numerical simulation,and the two-dimensional nonlinear dynamic fi-nite element method,cross sections of integral and separated embankment were respectively established for the a-nalysis of the dynamic response characteristics under different exceeding probability of seismic wave.The results of this study are summarized as follows.Acceleration amplification coefficients of separated type embankment at the center of both embankment surface and natural ground surface are less than that of integral type embankment. However,horizontal displacement and vertical displacement of separated type embankment are greater than that of integral type embankment.Meanwhile,the shear stress of both integral and separated embankment around twosides are concentrated under the slope feet.With the increase of peak acceleration of seismic waves,horizontal peak displacement on the surface of the embankment increases as the law of linear trend,and the vertical peak displacement increases as the law of exponentially function.These results could provide references and bases for seismic design of expressway in permafrost regions.关键词
青藏高速公路/地震波/典型路基/动力响应Key words
the Qinghai-Tibet Expressway/seismic wave/typical embankment/dynamic response分类
交通工程引用本文复制引用
赵涛,吴志坚,梁庆国,赵文琛,陈拓,徐世民..青藏高速公路路基地震动力响应分析[J].铁道科学与工程学报,2016,13(12):2381-2387,7.基金项目
国家自然科学基金资助项目（41562013，41472297）；甘肃省青年科技基金计划资助项目（1606RJYA239）；甘肃省基础研究创新群体资助项目 （）
