Deformation field and crack analyses of concrete using digital image correlation method

查看全文 作　　者：Yijie [1]HUANG;Xujia [1]HE;Qing [1]WANG;Jianzhuang [2]XIAO

机构地区：[1]Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation,Shandong University of Science and Technology,Qingdao 266590,China;[2]Department of Building Engineering,Tongji University,Shanghai 200092,China

出　　处：《Frontiers of Structural and Civil Engineering》索引2019年第13卷第5期,共17页

基　　金：The authors gratefully acknowledge the support by the National Natural Science Foundation of China (Grant No. 51408346);the Taishan Scholarship Project of Shandong Province (No. tshw20130956);the China Postdoctoral Science Foundation Funded Project (Nos. 2015M572584, 2016T0914). 摘　　要：The study on the deformation distribution and crack propagation of concrete under axial compression was conducted by the digital image correlation (DIC) method. The main parameter in this test is the water-cement (fT/C) ratio. The novel analysis process and numerical program for DIC method were established. The displacements and strains of coarse aggregate, and cement mortar and interface transition zone (ITZ) were obtained and verified by experimental results. It was found that the axial displacement distributed non-uniformly during the loading stage, and the axial displacements of ITZs and cement mortar were larger than that of coarse aggregates before the occurrence of macrocracks. The effect of W/C on the horizontal displacement was not obvious. Test results also showed that the transverse and shear deformation concentration areas (DCAs) were formed when stress reached 30%-40% of the peak stress. The transverse and shear DCAs crossed the cement mortar, and ITZs and coarse aggregates. However, the axial DCA mainly surrounded the coarse aggregate. Generally, the higher W/C was, the more size and number of DCAs were. The crack propagations of specimens varied with the variation of W/C. The micro-crack of concrete mainly initiated in the ITZs, irrespective of the W/C. The number and distribution range of cracks in concrete with high W/C were larger than those of cracks in specimen adopting low W/C. However, the value and width of eraeks in high W/C specimen were relatively small. The W/C had an obvious effect on the characteristics of concrete deterioration. Finally, the characteristics of crack was also evaluated by comparing the calculated results. 关键词：DEFORMATION filed distribution CRACK development digital image correlation method mechanical properties water-cement RATIO characteristics of DEFORMATION and CRACK

相关文献

参考文献（29）
引证文献（7）
耦合文献（120）

参考文献(29)

引证文献(7)

耦合文献(120)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Deformation field and crack analyses of concrete using digital image correlation method

参考文献(29)

引证文献(7)

耦合文献(120)

用户提示