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- W2803350251 abstract "Abstract To study the settlement and dynamic response characteristics of shallow square footings on geogrid-reinforced sand under cyclic loading, 7 sets of large scale laboratory tests are performed on a 0.5 m wide square footing resting on unreinforced and geogrid reinforced sand contained in a 3 m × 1.6 m × 2 m (length × width × height) steel tank. Different reinforcing schemes are considered in the tests: one layer of reinforcement at the depth of 0.3B, 0.6B and 0.9B, where B is the width of the footing; two and three layers of reinforcement at the depth and spacing both at 0.3B. In one of the two double layered reinforcing systems, the reinforcements are wrapped around at the ends. The footings are loaded to 160 kPa under static loading before applying cyclic loading. The cyclic loadings are applied at 40 kPa amplitude increments. Each loading stage lasts for 10 min at the frequency of 2 Hz, or until failure, whichever occurs first. The settlement of the footing, strain in the reinforcement and acceleration rate in the soil have been monitored during the tests. The results showed that the ultimate bearing capacity of the footings was affected by the number and layout of the reinforcements, and the increment of bearing capacity does not always increase with the number of reinforcement layers. The layout of the reinforcement layers affected the failure mechanisms of the footings. Including more layers of reinforcement could greatly reduce the dynamic response of the foundations under cyclic loading. In terms of bearing capacity improvement, including one layer of reinforcement at the depth of 0.6B was the optimum based on the test results. It is found that fracture of geogrid could occur under cyclic loading if the reinforcement is too shallow, i.e. for the cases with the first layer of reinforcement at 0.3B depth." @default.
- W2803350251 created "2018-06-01" @default.
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- W2803350251 date "2018-10-01" @default.
- W2803350251 modified "2023-10-17" @default.
- W2803350251 title "Load-settlement response of shallow square footings on geogrid-reinforced sand under cyclic loading" @default.
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- W2803350251 doi "https://doi.org/10.1016/j.geotexmem.2018.04.009" @default.
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