Results 251 to 260 of about 861,022 (290)

Repeated compressive loading of a sand

Canadian Geotechnical Journal, 1979
Twelve repeated load drained triaxial tests to at least 105 cycles on a sand are reported. A threshold stress of about 50% of the static failure strength was found. Below the threshold stress, the permanent deformation and resilient modulus reached constant values. Above the threshold stress, the permanent deformation began to increase rapidly and the
P. N. Gaskin, G. P. Raymond, F. Y. Addo-Abedi, J. S. Lau   +3 more
openaire   +1 more source

Repeated Load Aggregate Degradation

2020
Degradation of a variety of aggregate types, commonly used as ballast by the CN and CP railroads in Canada, and a non-ballast, were evaluated in the laboratory under different gradings, applied stresses, and density conditions. The ballasts were subjected to the one-dimensional and triaxial repeated loading stress states, encompassing some of the ...
openaire   +1 more source

Embedment Anchors Subjected to Repeated Loading

Journal of the Geotechnical Engineering Division, 1978
In order to provide a reliable method of estimating the effects of repeated loading on the holding capacity of an anchorage for the purpose of designing embedment anchor systems for long-term use, tests were performed on circular plate anchors connected to a rigid tie shaft which were placed in a medium, uniform saturated sand.
Andreas Andreadis, Roger C. Harvey, Eldon Burley   +2 more
openaire   +1 more source

[Repeated ergometric loading].

Vnitrni lekarstvi, 1989
The action of cardioactive substances is tested by repeated ergometric loads. The aim of the present work was to assess whether after previous loads in the organism certain adaptational changes persist, cardiovascular, respiratory or metabolic, which might influence the course of a subsequent load.
M, Kozáková, J, Petrtýl, V, Tesar
openaire   +1 more source

Repeated load testing of a granular material

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1974
Both the resilient and permanent strains were measured and shown to reach equilibrium values after some 10 4 stress cycles under drained test conditions. The effect of changes in both the mean level and the amplitude of the deviator stress were studied and samples were tested at various constant cell pressures.
openaire   +1 more source

Reinforced Concrete Beams under Repeated Loads

Journal of the Structural Division, 1969
This paper describes the results of an experimental program of the effect of repeated loads on the rotation and load carrying capacity of reinforced concrete beams. Comparing results obtained under repeated loading with results obtained on similar specimens under single loading showed that neither the rotation nor the load carrying capacity of a ...
Walter M. Ruiz, George Winter
openaire   +1 more source

Structural Safety Indices for Repeated Loads

Journal of the Engineering Mechanics Division, 1978
Approximations for the distribution functions of the extremes in a number of repetitions of a random variable are developed based on the crossing approach. Results are obtained for independent repetitions and Gauss-Markov correlated sequences and processes.
Mircea Grigoriu, Carl J. Turkstra
openaire   +1 more source

Effects of Repeated structures Thermal Loading

Aircraft Engineering and Aerospace Technology, 1960
A very simple redundant structure is subjected to temperature cycling, primarily to determine the influence of the yield stress/temperature relation on its behaviour: the range and periodic time of the temperature cycle are included as subsidiary variables.
openaire   +1 more source

Beam-Column Subassemblages Under Repeated Loading

Journal of the Structural Division, 1972
The behavior of two types of structural steel half-scale subassemblages of a multistory unbraced frame have been investigated experimentally. These subassemblages were subjected to simulated gravity and cyclic seismic loads. The results obtained in the tests of the upper story specimens show that the weakest element of the subassemblage was the panel ...
Vitelmo V. Bertero, Egor P. Popov, Helmut Krawinkler   +2 more
openaire   +1 more source

Repeated compressive loading of Leda clay

Canadian Geotechnical Journal, 1979
Repeated load drained tests on Leda clay, as related to subgrade performance, are reported. A threshold stress divided the performance into failing and stable specimens. For the stable specimens the resilient modulus attained equilibrium at about 105 cycles but varied with stress level. Permanent strains continued even at low stresses.
G. P. Raymond, P. N. Gaskin, F. Y. Addo-Abedi   +2 more
openaire   +1 more source