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A platform for research: civil engineering, architecture and urbanism
Vertical Dynamic Response of Embedded Footings
Field tests were conducted with vibrators on prototype embedded transmission tower footings in two different soils to determine their vertical mode dynamic response characteristics. One test was on a belled-auger footing in a soft, saturated clay. The remaining tests were on anchor bar, screw auger, and single- and double-pressed plate footings in low-density dune sand. Also, in situ wave velocity measurements and laboratory resonant column tests were conducted to determine the dynamic properties of the soils. Response curves obtained for the belled-auger footing were compared with responses calculated using the half-space theory and the lumped parameter method. Results obtained using the half-space theory differed considerably from measured values. Lumped parameter results indicated that the method was applicable; however, additional testing is needed to further define the effects of embedment on the mass, spring, and damping constants. The dynamic properties of the dune sand determined by in situ velocity measurements, resonant column tests, and empirical relationships were in very close agreement. (Author)
Vertical Dynamic Response of Embedded Footings
Field tests were conducted with vibrators on prototype embedded transmission tower footings in two different soils to determine their vertical mode dynamic response characteristics. One test was on a belled-auger footing in a soft, saturated clay. The remaining tests were on anchor bar, screw auger, and single- and double-pressed plate footings in low-density dune sand. Also, in situ wave velocity measurements and laboratory resonant column tests were conducted to determine the dynamic properties of the soils. Response curves obtained for the belled-auger footing were compared with responses calculated using the half-space theory and the lumped parameter method. Results obtained using the half-space theory differed considerably from measured values. Lumped parameter results indicated that the method was applicable; however, additional testing is needed to further define the effects of embedment on the mass, spring, and damping constants. The dynamic properties of the dune sand determined by in situ velocity measurements, resonant column tests, and empirical relationships were in very close agreement. (Author)
Vertical Dynamic Response of Embedded Footings
D. A. Tiedemann (author)
1972
30 pages
Report
No indication
English
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