期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：570
期号：2
DOI：10.1088/1755-1315/570/2/022038
语种：English
出版社：IOP Publishing
摘要：The biaxial shear creep test was carried out to investigate the shear rheological characteristics and long-term shear strength on the cemented interface between concrete and bedrock and study the long-term stability of gravity anchorage with notched sill situated on soft rock. The shear rheological model was proposed and its corresponding parameters were identified. A numerical simulation of the shear test with thin-layer element was adopted to simulate the shear rheological behavior of the cemented interface, which was verified reasonably by test results. Further numerical simulation using the 3D viscoelastic–plastic model was implemented to study the long-term stability of gravity anchorage with notched sill. The shear creep test results showed that the Burges rheological constitutive model can fully reflect the shear rheological characteristics of the cemented interface; the long-term shear strength decreased markedly with time, especially cohesion. In addition, time-dependent numerical simulation on the stability of gravity anchorage with notched sill indicated that the displacement of the anchorage foundation of Ganjiang Bridge experienced a transient stage of creep decay and then quickly entered into stable state under the tension of the main cable. The anti-sliding effect of notched sill showed distinct time-dependent property. As the creep displacement increased, the resistance at the normal face of the notched sill functioned well and remained constant when the creep displacement was stable.
