The study experimentally simulates in-situ degradation mechanisms to investigate the degradation of weak sandstone. Following different artificial degradation processes, the specimens are subjected to uniaxial compression. From the experimental results, it is noted that degradation of the tested weak sandstone results in a marked reduction in strength and elastic modulus and an increase in the failure strain. On the basis of the experimental results, a constitutive model is proposed to describe the mechanical behavior of weak sandstone. The presented constitutive model contains a hyperbolic pore/crack closure model and a continuum damage mechanics model. By comparing the simulated and experimental results, it is demonstrated that the proposed model can closely simulate the stress-strain relation of weak sandstone with very limited material parameters.
|主出版物標題||The geotechnics of hard soils - soft rocks. Proceedings of the second international symopsium on hard soils-soft rocks, Naples, October 1998. (Two volumes).|
|編輯||A. Evangelista, L. Picarelli, A. Evangelista, L. Picarelli|
|出版狀態||Published - 1 十二月 1998|
|事件||Proceedings of the second international symposium on hard soils-soft rocks 1998. - Naples, Italy|
持續時間: 12 十月 2098 → 14 十月 2098
|Conference||Proceedings of the second international symposium on hard soils-soft rocks 1998.|
|期間||12/10/98 → 14/10/98|