山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (5): 121-131.doi: 10.6040/j.issn.1672-3961.0.2022.163
• 土木工程 • 上一篇
宋洋1,罗志恒2,张波1*,张宇1,朱敏1
SONG Yang1, LUO Zhiheng2, ZHANG Bo1*, ZHANG Yu1, ZHU Min1
摘要： 以类岩石材料制作含不同位置和不同角度既有裂隙的棱柱体试件模拟岩体短柱,进行单轴压缩试验,利用GDEM软件进行相应数值模拟,分析裂隙位置对岩柱单轴压缩破坏形态及强度特征影响。研究结果表明:裂隙扩展受到边界的影响,导致中心含既有裂隙和边端含既有裂隙的岩柱在裂纹扩展及破坏模式上均有明显不同;当边端含有既有裂隙时,张拉翼裂纹首先出现在既有裂隙靠近边界一侧的尖端,距离试件边界较近的裂隙尖端的起裂强度小于距离试件中心较近一侧;而试件中心含有既有裂隙时,张拉翼裂纹在既有裂隙两侧尖端同时出现,且两侧尖端的起裂强度较接近。边端含有既有裂隙试件的起裂强度及峰值强度低于中心含有既有裂隙试件。
中图分类号:
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