Geosynthetic biaxial tension creep tester
2010
The invention provides a geosynthetic biaxial tension creep tester. The tester comprises a main frame platform and a cross-shaped tensile testing device arranged on the main frame platform, wherein the cross-shaped tensile testing device comprises four groups of clamping devices, four groups of guiding devices, four groups of displacement sensors and four force-applying devices; the clamping devices are used to clamp the four edges of a test-piece placed in the middle of the cross-shaped tensile testing device and separately connected with the four force-applying devices arranged at the four ends of the cross-shaped tensile testing device through steel cables; the four groups of clamping devices can slide to the force-applying devices separately along the four groups of guiding devices; and the displacement sensors are separately arranged between the clamping devices and the force-applying devices. The geosynthetic biaxial tension creep tester of the invention can be used to perform creep test in any complex stress-strain loading path under the action of biaxial tensile loading, and compared with the easy uniaxial tension test, the creep test is more similar to the actual stress-strain state in engineers.
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