厦门大学学报（自然科学版）2016，Vol.55Issue(4)：596-600,5.DOI:10.6043/j.issn.0438-0479.201509025
钢筋混凝土梁表面多裂缝扩展的试验研究
Experimental Study of Multi-crack Propagation Monitoring on the Surface of Reinforced Concrete Beam
摘要
Abstract
Using single-mode fiber(SMF)and Brillouin optical time-domain analyzer(BOTDA),we test and study the multi-crack propagation at a certain load on the surface of a reinforced concrete beam which embodies two existing cracks.The width of two cracks measures 0.5 mm and 0.1 mm,respectively,and the spacing is 20 cm.Encircling the bare fiber with the diameter of 250μm four times across the same crack,and sticking with different adhesive,we conduct a comprehensive study of the impact of the paste effect on measurement results.We place a 10 kN static load on the middle of the beam to activate the propagation of cracks,while set-ting the spatial-resolution and sampling-interval of the BOTDA with 5 cm and 1 cm,respectively.Measurement results show that the BOTDA with high spatial-resolution and a smaller sampling interval can more accurately measure the strain distribution of closely spaced cracks under different degrees of propagation,reflect the propagation situation of intensive cracks on the continuous concrete beam.In other words,measurement results are basically unaffected by different adhesives.关键词
布里渊光时域分析仪(BOTDA)/应变分布/钢筋混凝土梁/裂缝扩展Key words
Brillouin optical time-domain analyzer(BOTDA)/strain distribution/reinforced concrete beam/crack propagation分类
建筑与水利引用本文复制引用
陶思聪,赖博文,雷鹰,陈志为,董小鹏..钢筋混凝土梁表面多裂缝扩展的试验研究[J].厦门大学学报（自然科学版）,2016,55(4):596-600,5.基金项目
国家质检总局2014年科技计划项目(2014IK199) （2014IK199）
福建省科技计划项目(2014H6027) （2014H6027）
厦门市科技项目(3502Z20141049) （3502Z20141049）
