Proposal for an Improved Procedure and Interpretation of ASTM C1531 for the In Situ Determination of Brick-Masonry Shear Strength

Masonry 2018 ◽  
2018 ◽  
pp. 13-33 ◽  
Author(s):  
Francesco Graziotti ◽  
Gabriele Guerrini ◽  
Andrea Rossi ◽  
Guido Andreotti ◽  
Guido Magenes
Keyword(s):  
Shear Strength ◽  
Brick Masonry

Determination of In Situ Sediment Shear Strength from Advanced Piston Corer Pullout Forces

2000 ◽  
Vol 18 (4) ◽  
pp. 295-314 ◽  
Author(s):  
Timothy J. G. Francis ◽  
Yir-Der E. Lee
Keyword(s):  
Shear Strength ◽  
Piston Corer

Determination of In Situ Sediment Shear Strength from Advanced Piston Corer Pullout Forces

2000 ◽  
Vol 18 (4) ◽  
pp. 295-314
Author(s):  
Timothy J. G. Francis, Yir-Der E. Lee
Keyword(s):  
Shear Strength ◽  
Piston Corer

Determination of the Oldman River Dam foundation shear strength

1991 ◽  
Vol 28 (5) ◽  
pp. 698-707 ◽  
Author(s):  
M. M. Davachi ◽  
B. J. Sinclair ◽  
H. H. Hartmaier ◽  
B. L. Baggott ◽  
J. E. Peters
Keyword(s):  
Shear Strength ◽  
Large Diameter ◽  
Site Investigation ◽  
Bedding Plane ◽  
Plane Shear ◽  
Dam Foundation ◽  
Shearing Resistance ◽  
Oldman River

The paper describes the results of site investigation and laboratory testing and the analysis performed for the determination of foundation shear strength at the Oldman River Dam site in southwestern Alberta, Canada. Horizontally bedded claystones, siltstones, and sandstones at the site contain relatively weak bedding-plane shears that adversely affect foundation stability. Data on the bedding-plane shear characteristics were collected by mapping, borehole coring, shaft exploration, and large-diameter sampling. Shear planes of structure-wide continuity were identified. Numerous laboratory direct shear tests were done to measure in situ and residual shear strengths. The design angle of shearing resistance of selected continuous bedding-plane shears was evaluated by summing the representative residual angle of shearing resistance and components of the angle of shearing resistance due to in situ state, roughness, and thickness of the bedding-plane shears. Relatively flat dam slopes were found to be required for stability. The methods used at the Oldman River Dam should be applicable at other sites located in flat-lying mudrock sequences. Key words: Oldman River Dam, foundation shear strength, sedimentary rocks, bedding-plane shear, residual angle of shearing resistance, in situ state, roughness, thickness.

Pénétromètre à chute libre: Impact et pénétration dans des argiles reconstituées

1985 ◽  
Vol 22 (1) ◽  
pp. 129-135 ◽  
Author(s):  
D. Levacher
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Key Words ◽  
Laboratory Tests ◽  
Free Fall ◽  
Test Series ◽  
Dynamic Resistance ◽  
In Situ Testing

The use of a free-fall penetrometer for the determination of the in situ mechanical properties of reconstituted clays is presented. The penetrometer is equipped with an accelerometer for measuring continuously the acceleration or the deceleration. The equipment is relatively simple and the test is fast. The usefulness of such a test is demonstrated, and its adaptation to in situ testing is easy to achieve. Laboratory tests indicate that the shear strength can be directly computed as a function of depth. The penetrometer, as developed, can reach a depth of 0.50 m, but it is possible to achieve greater depths with some modifications. The results presented pertain to a few test series on reconstituted clays, with impact velocities up to 8 m/s. Key words: penetrometer, impact, reconstituted clays, tests, dynamic resistance, cohesion. [Journal translation]

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