科研之友
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摘要
In order to study damage fracture law of fissured rock masses, the hydrostatic pressure vertical to crack surface and drag force parallel to crack surface were taken into consideration, both of which are generated by water action. Stress condition of single crack under compressive-shearing stress condition and tensile-shearing stress condition were calculated respectively. And the stress intensity factor during water action was deduced. A new damage variable related to fracture toughness was presented and the new damage variable was introduced into Dugdale crack model, and the stress intensity factor of compressive-shearing crack and tensile-shearing crack were deduced respectively. Finally, fracture criterion of fractured rock mass considering water damage action was presented, under compressive-shearing stress condition and tensile-shearing stress condition respectively, based on the compressive-shearing fracture criterion and the maximum hoop stress theory.
- 出版日期2012
- 单位中南大学
