Spalling characteristics of high-temperature treated granitic rock at different strain rates  

作　　者：L.F.Fan Q.H.Yang X.L.Du 

机构地区：[1]The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing,100124,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第4期1280-1288,共9页岩石力学与岩土工程学报（英文版）

基　　金：supported by the Beijing Natural Science Foundation,China(Grant No.JQ20039);National Natural Science Foundation of China(Grant No.12172019).

摘　　要：The dynamic spalling characteristics of rock are important for stability analysis in rock engineering.This paper presented an experimental investigation on the dynamic spalling characteristics of granite with different temperatures and strain rates.A series of dynamic spalling tests with different impact velocities were conducted on thermally treated granite at different temperatures.The dynamic spalling strengths of granite with different temperatures and strain rates were determined.A model was proposed to correlate the dynamic spalling strength of granite,high temperature and strain rate.The results show that the spalling strength of granite decreases with increasing temperature.Moreover,the spalling strength of granite with a higher strain rate is larger than that with a lower strain rate.The proposed model can describe the relationship among dynamic spalling strength of granite,high temperature and strain rate.

关 键 词：Dynamic spalling characteristics High temperature Strain rate Dynamic loading GRANITE 

分 类 号：TU45[建筑科学—岩土工程]