岩土工程学报2016，Vol.38Issue(12)：2237-2245,9.DOI:10.11779/CJGE201612012
应力波入射黏弹性节理的传播特性研究
Propagation characteristics of stress waves across viscoelastic joints
摘要
Abstract
The studyonthepropagation characteristics of stress waves is crucial to estimate the dynamic stability ofproject construction.Based on the excavation blasting testson the basalt rock mass with columnar joints andconsidering the creep and stress relaxationcharacteristics of rock, an equivalent standard linear solid model for rock mass jointsis proposed.By using the displacement discontinuity method, the propagation equationfor obliquely incident stress waves across viscoelastic jointsis carried out. Then the propagation characteristicsare studied. The reflection coefficient increases with the increaseofthe frequencyofincident waves, but the transmission coefficient decreasesrapidly. Astheincident angle increases withinthe critical angle, the transmission coefficient of converted waves (Tsp orTps) has the smallest value and increases at first then decreases,while thereflection coefficient of converted waves (Rsp orRps),andRss(Rpp) decreases at first then increases, but Tss(Tpp) basically has no change. Complexenergy transfer happens when thestress wavescrosstheviscoelastic joints. The energy betweenRss(Rpp) andRsp(Rps) transfers to each other, thenreaches their extreme pointsalmosttogether when theincident angle is close toa certain value. The energy ofthe same kindofwaves is beentransferred to that ofconverted waves as the incident angle increases. Butthe same kindofwaves have much more energy than theconverted waves all the way.关键词
黏弹性节理/应力波传播/等效标准线性固体模型/透射系数/反射系数Key words
viscoelastic joint/stress wave propagation/equivalent standard linear solid model/transmission cosfficienti/reflection coefficient分类
建筑与水利引用本文复制引用
饶宇,赵根,吴新霞,夏元友,刘美山..应力波入射黏弹性节理的传播特性研究[J].岩土工程学报,2016,38(12):2237-2245,9.基金项目
国家自然科学基金项目（51374163）；国家自然科学基金青年科学基金项目 （）
