数字照相在混凝土变形量测中的实验研究

Experimental Research of Close Range Photogrammetric Technique on the Deformation Measurement for Concrete Specimen

数字照相量测(简称DPDM)是一项基于近景数字摄影与图像处理分析的先进试验量测技术.为检验DPDM技术以及笔者研制的软件系统PhotoInfor在混凝土材料变形量测中的适用性,采用MTS815试验机,对若干混凝土试件进行了压缩变形观测试验,得到了混凝土试件表面的位移矢量、应变场和局部测点变形的发展演变过程,并对裂缝的分布区域和宽度扩展进行了定性和定量分析.实验研究证明:DPDM是研究混凝土材料与结构变形及其裂缝演变特性的一项强有力的试验量测新手段.

Digital Photogrammetry for Deformation Easurement （ DPDM）, which is based on the close range photogrammetric technique, is an advanced non -contact measurement method widely used in geotechnical experiments. For checking, its applicability in deformation measurement for concrete, a series of compression tests for concrete specimens are conducted in the MTS815 test system. The software package Photolnfor, developed by the first author is used to capture the displacement, strain fields and local deformation evolution quantitatively as well as crack during concrete compressed. The results prove that DPDM is a powerful tool for identifying the deformation and crack characteristics of concrete structure.