高烈度地震区公路填方路基大型振动台模型试验  

Large-scale Shaking Table Model Test for Fill Subgrade of Highway in High-intensity Earthquake Area

作　　者：李金贝[1] 张鸿儒[1] 李志强[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]交通运输部科学研究院,北京100029

出　　处：《公路交通科技》2011年第11期1-6,共6页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(200831822196;2009318740099)

摘　　要：为了深入研究公路填方路基的抗震安全,根据试验要求对填方路基进行了大型振动台模型试验方案设计。方案设计中首先介绍了振动台台阵体系、模型箱的设计和数据采集系统等试验装置;然后分析了填方路基振动台模型边界条件的处理和填方路基模型的相似关系,并在已有研究成果基础上结合本次试验特性确定了模型的相似常数,通过采用等量代替法来处理模型材料的相似级配,最终确定了模拟模型路基的试验材料。同时,在对填方路基数值分析的基础上,根据路基数值模型的动力反应特性确定了振动台试验测点的布置方案。最后,根据模型试验目的,编制了模型试验的加载制度。试验结果表明,填方路基的大型振动台模型试验设计方案可行,达到了振动台试验的目的。In order to study the seismic safety of highway fill subgrade,according to the test requirement,a large-scale shaking table model test scheme was designed for fill subgrade.First,the vibration system,the design of model box and the data acquisition system were introduced,the similar relation between treatment of the model boundary condition and fill subgrade model was analyzed,and the similarity constants are determined combining the test characteristics.The model material was determined by using the equivalent substitution method to deal with the similar gradation.Meanwhile,the arrangement of sensors was selected based on the numerical analysis of dynamic response characteristics.Finally,the loading scheme of the model test was prepared according to its purpose.The test result shows that the design of large-scale shaking table model test is feasible,and the purpose of the shaking table test was achieved.

关 键 词：道路工程 填方路基 振动台模型试验 试验验证 高烈度地震区 

分 类 号：U416.103[交通运输工程—道路与铁道工程]