粒子测速技术和透明土在土与结构动力相互作用研究中的应用  

Application of PIV and Transparent Soil in the Study of the Dynamic Soil-Structure Interaction

作　　者：赵红华[1] 葛玉宁 李鹏飞[1] 

机构地区：[1]大连理工大学工程力学系,辽宁大连116024 [2]密苏里理工大学土木工程系

出　　处：《西北地震学报》2011年第B08期148-154,共7页Northwestern Seismological Journal

基　　金：中国高校基本科研项目;国家重点基础研究计划项目(2010CB731502)

摘　　要：为了观测和研究土体内部的变形,人工合成透明土和图像光学技术作为新兴的试验技术成为岩土力学研究的有力手段。根据一系列共振柱/扭剪仪试验测得的人工合成透明土的基本动力特性在某种程度上表现出了与天然土类似的变化规律,可以在动力试验中用来作为天然土的代替品。并介绍了用于土体变形测量的粒子图像测速技术的工作原理和基于神经元网络的像机校正方法。利用两个小型振动台试验,采用透明土和粒子测速技术研究了刚性块体和透明土的动力相互作用。试验表明粒子测速技术和透明土在土与结构动力相互作用中是一个有力的研究工具。In order to measure and observe the deformation inside the soil mass,the emerging new experimental technology such as transparent soil and image optics have become the important research tools in the geomechanics research field.The dynamic properties of transparent soil obtained through a series of resonant column/torsional shear tests show that they are similar with the natural soil to some extent.Thus,it can be used as the substitute for the natural soil in the dynamic tests. Furthermore more,the work principle of Particle Image Velocimetry（PIV）in measuring soil deformation and a camera calibration method based on the neural network are briefly introduced.The transparent soil and PIV are applied together to investigate the dynamic interaction between a rigid block and the transparent soil in two small scale shake table tests.The result shows that transparent soil and PIV are an important research tool in the dynamic soil-structure interaction field.

关 键 词：粒子测速技术(PIV) 透明土 振动台试验 土与结构动力相互作用 

分 类 号：TU411.3[建筑科学—岩土工程]