基于应力松弛试验的结构面长期强度确定方法

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Abstract To study the characteristics of shear stress relaxation of rock with a structural plane and the connection between the stress relaxation and the long-term strength，the samples with artificial joint surfaces based on the 4th，6th，and 10th discontinuity lines from Barton′s ten standard lines were made using cement mortar. The shear stress relaxation tests under cyclic loading with the shearing loading value larger than the long-term shear strength were conducted with the biaxial rheological testing machine. The shear stress relaxation was studied based on the test results. The mechanism of interaction between the stress relaxation and the creep was discussed，and a stress relaxation method was proposed to determine the long-term strength.

Key words： rock mechanics cyclic loading stress relaxation discontinuity long-term strength

Received: 29 August 2013

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https://rockmech.whrsm.ac.cn/EN/Y2014/V33/I09/1916

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