采矿与安全工程学报Issue(4)：635-638,4.
基于光纤光栅拉拔实验锚杆应力分布研究
On stress distribution of bolt in pullout test based on FBG
摘要
Abstract
In order to detest the stress distribution of the anchor bolts, a fiber Bragg grating(FBG) opt-ical fiber sensing technology was adopted to build a long-term bolting quality online monitoring system .. The rock bolting process and forces existing in a coal mine tunnel are simulated in the laboratory and the bolt pullout test has been conducted. By fiber Bragger grating the strains of the anchor bolt are measured. Then the strain dates are fitted with Gauss function. The axial stress distribution and the shear stress distribution are got. The experiment results show that it is feasible to test strain of the anchor bolt by FBG. The axial stress can be fitted accurately by Gauss function. The parameter t of the Gaussian function is related to the grip ability of the rock. The shift in changing direction of parameter t indicates that the interface between the rock and the bolt is changing and the grip ability of the rock begins de-clining. The research result can be a reference for the real-time monitoring of anchor bolt quality.关键词
应力分布/剪应力分布/光纤光栅/高斯函数Key words
stress distribution/shear stress distribution/fiber grating/Gauss function分类
建筑与水利引用本文复制引用
张桂花,柴敬,李毅,弥旭锋..基于光纤光栅拉拔实验锚杆应力分布研究[J].采矿与安全工程学报,2014,(4):635-638,4.基金项目
国家自然科学基金项目(51174280)；西安市碑林区2013年科技计划项目(GX1312) （51174280）
