水平地震荷载下散体材料结构响应分析  

Response analysis of granular material structure subjected to horizontal seismic force

作　　者：蒋红英[1] 杨晓强[2] 鲁进步[3] 厉玲玲[2] 

机构地区：[1]西京学院工程技术系,陕西西安710123 [2]兰州理工大学土木学院,甘肃兰州730050 [3]西安外事学院,陕西西安710077

出　　处：《四川建筑科学研究》2010年第4期175-178,共4页Sichuan Building Science

基　　金：国家自然科学基金(10402012);西京学院基金(090103)

摘　　要：实验模拟了基础工程中散体材料褥垫层,研究了水平地震荷载作用下基础褥垫层中出现的似"巴西坚果效应"引起的级配破坏和不均匀震陷,分析了不同的振动时间、频率对其破坏的影响程度。结果表明,时间和频率对级配破坏深度影响显著。对水平地震荷载作用下出现的散体材料结构响应给出了理论解释,并探讨了散体材料结构中小颗粒下沉形式的概率模型。The experiment simulated the ground treatment of cushion mehtod using the granular material in the foundational engineering,researched the gradation destruction and uneven collapse caused by the phenomenon similar to ＂Brazil Nut Effect＂,this phenomenon was generated when the foundation mattress cushion suffered the horizontal seismic force,analyzed the influence of various vibration time and various vibration frequency on the destruction extent.The results demonstrated that both the vibration time and the vibration frequency had notable effect on the destruction extent of the gradation.This article explained the construction response of the granular material when it suffered the horizontal seismic force and investigated the probability model of the micro aggregate＇s submergeing form in the granular material structure.

关 键 词：散体材料结构 水平地震荷载 级配破坏深度 小颗粒下沉 

分 类 号：TU472.21[建筑科学—结构工程]