相移电子散斑干涉法测量混凝土加固面层受载变形  

Deformation of Reinforced Concrete-surface under Loading Measured by Phase-shift ESPI

作　　者：戴宜全[1] 宋永生[2] 郭彤[2] 何小元[1] 

机构地区：[1]东南大学力学研究所,南京210096 [2]东南大学混凝土与预应力混凝土结构教育部重点实验室,南京210096

出　　处：《特种结构》2010年第1期90-93,共4页Special Structures

基　　金：国家自然科学基金项目资助(10727201);国家自然科学基金项目资助(50608017);重庆交通大学桥梁结构工程交通行业重点实验室开放课题项目;(CQSLBF-Y09-2);东南大学优秀青年教师资助计划项目

摘　　要：利用激光双光束散斑干涉并引入相移技术,对复合混凝土加固件进行全场位移、应变实验测量。借助于图像处理技术,通过分析散斑干涉条纹图可以得到加固件在不同荷载作用下的位移、应变分布,从而实现对采用不同规格、材料参数时的加固性能进行评估分析。实验表明,相移散斑干涉技术不仅可以实现高精度的位移测量,通过对位移场进行数值拟合求导得到的应变同样具有很高的精度。文中对实验方法进行了较详细的讨论,并对典型试件的图像处理过程进行说明。相关技术可以作为类似工程的有益参考。Based on dual-beam laser inteference and phase-shifting technology, whole-fwld displacement and strain on reinforced composite mortar was detected in experiment testing. By taking advantage of digital image processing , the distributions of displacement and strain on the surace of reinforced concrete under different loadings were obtained from interference pattern analysis, based on which the performance of reinforce according to different specifications and material parameters was evaluated. Experiment indicates that phase-shifting electronic speckle pattern interferometry is competent of high precision displacement measurement. At the same time, the strain obtained by digital fitting and digital difference is of high precision too. In the paper, the experiment method is discussed in detail and the course of image processing for representative sample is presented. Relevant techniques can be useful reference for similar engincering application.

关 键 词：电子散斑干涉(ESPI) 复合混凝土加固 全场位移应变 

分 类 号：TU746.3[建筑科学—建筑技术科学]