撞击作用下单桩动力反应模型试验研究  

Experimental study on dynamic response of single pile under impact action

作　　者：程晔[1] 王继乾 夏佩云[3] 

机构地区：[1]南京航空航天大学土木工程系,江苏南京210016 [2]濮阳市财政局评审中心,河南濮阳457000 [3]济南铁路局,山东济南250001

出　　处：《岩土工程学报》2013年第S2期1041-1044,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金青年基金(51208255);南京航空航天大学基本科研业务费资助项目(NS2012019);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：船舶撞击会影响到桥梁桩基础的安全,而对撞击作用下桩基础的动力反应缺乏研究。基于直接法的思路开展模型试验,建立撞击物、单桩、承台和土的模型,模拟撞击承台的过程,采集桩的动力反应数据,研究撞击物、上部结构、桩径及土体等碰撞关联物体的特性对撞击作用下单桩的桩顶最大位移和最大加速度的影响。研究表明,在撞击作用下,单桩的最大桩顶位移和最大桩顶加速度,不仅与撞击物的质量和速度大小有关,与桥梁上部结构荷载、桩径及土体性质均有关。Ship impact will have effect on the safety of piles of bridges, while the study on the dynamic response of the piles under impact is scarce. By using the direct method, the model tests are carried out. Models for impact, single pile, bearing platform and soils are established. The process of impacting the bearing platform is simulated. The data of the dynamic response of the piles are obtained. How the characteristics of the impact, superstructure, piles and soils affect dynamic response of pile is studied. It is stated that the maximal horizontal displacement of pile top and the maximum acceleration of pile top are affected by the mass and velocity of impact, load of supperstructure, diameter of piles and shear modulus of soils.

关 键 词：撞击 桩 动力反应 模型试验 

分 类 号：TU473.1[建筑科学—结构工程]