Effects of Strain Rate and Water Saturation on the Tensile Strength of Rocks

변형률 속도 및 수분포화가 암석의 인장강도에 미치는 영향

  • 정우진 ((주)우진엔지니어링 연구개발부)
  • Received : 2010.04.09
  • Accepted : 2010.04.22
  • Published : 2010.04.30


Hopkinson's effect tests were carried out for various strain rates on three different types of rock in both saturated and dry states in order to examine the effects of strain rate and water saturation on tensile strength. The tensile strength increased with the increase of the strain rate not only in dry state but also in saturated state. It was also especially recognizable that the dynamic tensile strength of rock in the dry state was proportional to approximately a one-third multiple of strain rate no matter what the type of rock. It was found that water saturation decreased tensile strength in the dry state of sandstone and tuff, both with high porosity, but no significant difference could be recognized between the dry and the saturated states of granite, which has a low porosity of 0.49%.


  1. 木下直人, 堀田政國, 松井裕哉, 杉原弘造, 1999, 発破振動計測と引張強度試験に基づく掘削損傷領域の評価, 第26回岩盤力学に関するシンポジウム講演論文集, pp.221-225.
  2. 小林良二, 1964, 高速静荷重下における岩石の力学的性質 (第1報), 日本工業会誌, 81, pp.429-434.
  3. Sano, O., Ito, I. and Terada, M., 1981, Influence of strain rate on Oshima granite under uniaxial compression, J. Geophys. Res., 86, pp.9299-9311. https://doi.org/10.1029/JB086iB10p09299
  4. 馬貴臣, 三宅淳巳, 小川輝繁, 和田有司, 緒方雄二, 瀬戸政宏, 勝山邦久, 1998, ホプキンソン効果による応力速度が大きい場合の材料の引張強度, 火薬学会誌, 59, pp.49-56.
  5. 山口桃太郎, 西松裕一, 1983, 岩石力学入門, 東京大学出版会, 130.
  6. Ross, C.A., Jerome, D.M., Tedesco, J.W. and Chen, E.P., 1996, Moisture and strain rate effects on concrete strength, ACI Materials Journal, 93.3, pp.293-300.
  7. 工業火薬協会編, 1988, 新. 発破ハンドブック, 山海堂, 394p.
  8. 馬貴臣, 1998, 発破による構造物の解体工法の安全性に関する研究, 横浜国立学学位論文, pp.17-22.
  9. Rinehart, J.S., 1965, Dynamic fracture strength of rocks, Proc. 7th Symp. Rock Mech., Univ. Park, Penn., pp.17-22.