Geomechanics and Engineering

  • 제17권3호
  • /
  • Pages.253-259
  • /
  • 2019
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Frictional responses of concrete-to-concrete bedding planes under complex loading conditions

  • Dang, Wengang (School of Civil Engineering, Sun Yat-sen University) ;
  • Konietzky, Heinz (Geotechnical Institute, TU Bergakademie Freiberg) ;
  • Li, Xiang (School of Resources and Safety Engineering, Central South University)
  • 투고 : 2018.07.09
  • 심사 : 2019.01.22
  • 발행 : 2019.02.28
⟨ 이전 논문 다음 논문 ⟩

초록

Concrete-to-concrete bedding planes (CCBP) are observed from time to time due to the multistep hardening process of the concrete materials. In this paper, a series of direct/cyclic shear tests are performed on CCBP under static and dynamic normal load conditions to study the frictional behavior effect by the shear velocities, normal impact frequencies, horizontal shear frequencies, normal impact force amplitudes, horizontal shear displacement amplitudes and normal load levels. According to the experimental results, apparent friction coefficient k ($k=F_{Shear}/F_{Normal}$) shows different patterns under static and dynamic load conditions at the stable shear stage. k is nearly constant in direct shear tests under constant normal load conditions (DCNL), while it is cyclically changing with nearly constant peak value and valley value for the direct shear tests under dynamic normal load conditions (DDNL), where k increases with decreasing normal force and decreases with increasing normal force. Shear velocity has little influence on peak values of k for the DCNL tests, but increasing shear velocity leads to increasing valley values of k for DDNL tests. It is also found that, the valley values of k ascend with decreasing impact normal force amplitude in DDNL tests. The changing pattern of k for the cyclic shear tests under constant and dynamic normal load conditions (CCNL and CDNL tests) are similar, but the peak value of k is smaller in CDNL tests than that in CCNL tests. Normal load levels, shear displacement amplitudes, vertical impact frequencies, horizontal shear frequencies and normal impact force amplitudes have little influence on the changing pattern of k for the cyclic shear tests. The tests of this study provide useful data in understanding the frictional behavior of the CCBP under distinct loadings, and these findings are very important for analyzing the stability of the jointed geotechnical structures under complicated in situ stress conditions.

키워드

참고문헌

  1. Borana, L., Yin, J.H., Singh, D.N. and Shukla, S.K. (2016), "Interface behavior from suction-controlled direct shear test on completely decomposed granitic soil and steel surfaces", Int. J. Geomech., 16(6), D4016008. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000658
  2. Cavaco, E., Pacheco, I. and Camara, J. (2018), "Detailing of concrete-to-concrete interfaces for improved ductility", Eng. Struct., 156, 210-223. https://doi.org/10.1016/j.engstruct.2017.10.058
  3. Ceia, F., Raposo, J., Guerra, M., Julio, E. and Brito, J.D. (2016), "Shear strength of recycled aggregate concrete to natural aggregate concrete interfaces", Construct. Build. Mater., 109, 139-145. https://doi.org/10.1016/j.conbuildmat.2016.02.002
  4. Chen, N., Zhang, X., Jiang, Q., Feng, X., Wei, W. and Yi, B. (2018), "Shear behavior of rough rock joints reinforced by bolts", Int. J. Geomech., 18(1), 04017130. https://doi.org/10.1061/(ASCE)GM.1943-5622.0001048
  5. Crawford, A.M. and Curran, J.H. (1981), "The influence of shear velocity on the frictional resistance of rock discontinuities", Int. J. Rock Mech. Min. Sci., 18(6), 505-515. https://doi.org/10.1016/0148-9062(81)90514-3
  6. Dang, W., Fruhwirt, T. and Konietzky, H. (2017), "Behaviour of a plane joint under horizontal cyclic shear loading", Geomech. Eng., 13(5), 809-823. https://doi.org/10.12989/GAE.2017.13.5.809
  7. Dang, W., Konietzky, H. and Fruhwirt, T. (2016), "Direct shear behavior of a plane joint under dynamic normal load (DNL) conditions", Eng. Geol., 213, 133-141. https://doi.org/10.1016/j.enggeo.2016.08.016
  8. Dang, W., Konietzky, H., Chang, L. and Fruhwirt, T. (2018), "Velocity-frequency-amplitude-dependent frictional resistance of planar joints under dynamic normal load (DNL) conditions", Tunn. Undergr. Sp. Technol., 79, 27-34. https://doi.org/10.1016/j.tust.2018.04.038
  9. Hong, T. and Marone, C. (2005), "Effects of normal stress perturbations on the frictional properties of simulated faults", Geochem. Geophys. Geosyst., 6(3), 1-17.
  10. Hossain, M.A. and Yin, J.H. (2015), "Dilatancy and strength of an unsaturated soil-cement interface in direct shear tests", Int. J. Geomech., 15(5), 04014081. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000428
  11. Kilgore, B., Beeler, N.M. and Lozos, J.D., (2017), "Oglesby, rock friction under variable normal stress", J. Geophys. Res. Solid Earth, 122(9), 1-34.
  12. Kilgore, B., Lozos, J., Beeler, N. and Oglesby, D. (2012), "Laboratory observations of fault strength in response to changes in normal stress", J. Appl. Mech., 79(3), 031007. https://doi.org/10.1115/1.4005883
  13. Konietzky, H., Fruhwirt, T. and Luge, H. (2012), "A new large dynamic rockmechanical direct shear box device", Rock Mech. Rock Eng., 45(3), 427-432. https://doi.org/10.1007/s00603-011-0214-x
  14. Lee, S., Chang, I., Chung, M.K., Kim, Y. and Kee, J. (2017), "Geotechnical shear behavior of xanthan gum biopolymer treated sand from direct shear testing", Geomech. Eng., 12(5), 831-847. https://doi.org/10.12989/gae.2017.12.5.831
  15. Li, X., Cao, W., Tao, M., Zhou, Z. and Chen, Z. (2016), "Influence of unloading disturbance on adjacent tunnels", Int. J. Rock Mech. Min. Sci., 84, 10-24. https://doi.org/10.1016/j.ijrmms.2016.01.014
  16. Li, Y., Wu, W. and Li, B. (2018), "An analytical model for twoorder asperity degradation of rock joints under constant normal stiffness conditions", Rock Mech. Rock Eng., 51, 1431. https://doi.org/10.1007/s00603-018-1405-5
  17. Li, Y., Yang, Y., Yu, H.S. and Roberts, G.W. (2016), "Monotonic direct simple shear tests on sand under multidirectional loading", Int. J. Geomech., 17(1), 04016038. https://doi.org/10.1061/(ASCE)GM.1943-5622.0000673
  18. Liu, S., Mao, H., Wang Y. and Weng, L. (2018), "Experimental study on crushable coarse granular materials during monotonic simple shear tests", Geomech. Eng., 15(1), 687-694. https://doi.org/10.12989/GAE.2018.15.1.687
  19. Liu, Z. and Dang, W. (2014), "Rock quality classification and stability evaluation of undersea deposit based on M-IRMR", Tunn. Undergr. Sp. Technol., 40(2), 95-101. https://doi.org/10.1016/j.tust.2013.09.013
  20. Liu, Z., Dang, W. and He, X. (2012), "Undersea safety mining of the large gold deposit in Xinli District of Sanshandao Gold Mine", Int. J. Miner. Metall. Mater., 19(7), 574-583. https://doi.org/10.1007/s12613-012-0598-y
  21. Molinari, A. and Perfettini, H. (2017), "A micromechanical model of rate and state friction: 2. effect of shear and normal stress changes", J. Geophys. Res., 122(4), 2638-2652. https://doi.org/10.1002/2016JB013307
  22. Samanta, M., Punetha, P. and Sharma, M. (2018), "Effect of roughness on interface shear behavior of sand with steel and concrete surface", Geomech. Eng., 14(4), 387-398. https://doi.org/10.12989/GAE.2018.14.4.387
  23. Shang, J., Zhao, Z. and Ma, S. (2018), "On the shear failure of incipient rock discontinuities under CNL and CNS boundary conditions: insights from DEM modeling", Eng. Geol., 234, 153-166. https://doi.org/10.1016/j.enggeo.2018.01.012
  24. Stein, R.S. (1999), "The role of stress transfer in earthquake occurrence", Nature, 402(6762), 605-609. https://doi.org/10.1038/45144
  25. Tao, M. and Li, X. (2015), "The influence of initial stress on wave propagation and dynamic elastic coefficients", Geomech. Eng., 8(3), 377-390. https://doi.org/10.12989/gae.2015.8.3.377
  26. Waseem, S.A. and Singh, B. (2017), "Shear strength of interfaces in natural and in recycled aggregate concrete", Can. J. Civ. Eng., 44(3), 212-222. https://doi.org/10.1139/cjce-2016-0317
  27. Zhang, C., Ji, J., Gui, Y., Kodikara, J., Yang, S. and He, L. (2016), "Evaluation of soil-concrete interface shear strength based on LS-SVM", Geomech. Eng., 11(3), 361-372. https://doi.org/10.12989/gae.2016.11.3.361
  28. Zhou, Z., Zhao, Y., Cao, W., Chen, L. and Zhou, J. (2018), "Dynamic response of pillar workings induced by sudden pillar recovery", Rock Mech. Rock Eng., 51(10), 3075-3090. https://doi.org/10.1007/s00603-018-1505-2