A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modeling of dynamic soil-structure interaction phenomena in buried conduits
Dynamic soil-structure interaction phenomena are difficult to correlate with full scale events due to the lack of suitable data from full scale testing in the field. On the other hand, small scale model tests conducted at one gravity cannot replicate the in-situ overburden pressure conditions that govern the soil stiffness and strength which in turn exert a major influence on the interaction between the soil and the buried structure. This paper describes the results of a research project aimed at studying the interaction phenomena through testing in a geotechnical centrifuge to achieve stress conditions imilar to those found in the field. Scaled models of a circular pipe were made of micro-concrete that has properties similar to Portland cement concrete. Dynamic loads were applied through the rupturing of a pressurized burst-disc mounted above the surface of the soil in which the model pipe was buried. The dynamic overpressures, the stresses transmitted through the soil and the contact pressures acting on the surface of the buried conduits were measured by newly developed dynamic stress gages made of polyvinylidene fluoride. The free field stresses were similarly measured. Pipe deflections were measured by means of proximity transducers mounted inside the pipe. Among the factors investigated in the research project were soil density, relative structure-soil stiffness ratio and depth of burial. Experimental results were analyzed to define the amplification factor for contact stresses acting on the pipe relative to the free field stresses. The results are suitable for use in the design of buried conduits.
Modeling of dynamic soil-structure interaction phenomena in buried conduits
Dynamic soil-structure interaction phenomena are difficult to correlate with full scale events due to the lack of suitable data from full scale testing in the field. On the other hand, small scale model tests conducted at one gravity cannot replicate the in-situ overburden pressure conditions that govern the soil stiffness and strength which in turn exert a major influence on the interaction between the soil and the buried structure. This paper describes the results of a research project aimed at studying the interaction phenomena through testing in a geotechnical centrifuge to achieve stress conditions imilar to those found in the field. Scaled models of a circular pipe were made of micro-concrete that has properties similar to Portland cement concrete. Dynamic loads were applied through the rupturing of a pressurized burst-disc mounted above the surface of the soil in which the model pipe was buried. The dynamic overpressures, the stresses transmitted through the soil and the contact pressures acting on the surface of the buried conduits were measured by newly developed dynamic stress gages made of polyvinylidene fluoride. The free field stresses were similarly measured. Pipe deflections were measured by means of proximity transducers mounted inside the pipe. Among the factors investigated in the research project were soil density, relative structure-soil stiffness ratio and depth of burial. Experimental results were analyzed to define the amplification factor for contact stresses acting on the pipe relative to the free field stresses. The results are suitable for use in the design of buried conduits.
Modeling of dynamic soil-structure interaction phenomena in buried conduits
Modell der dynamischen Wechselwirkung zwischen Boden und Konstruktion in unterirdischen Rohrleitungen
Shin, C.J. (author) / Whittaker, J.P. (author) / Ko, H.Y. (author) / Sture, S. (author)
1991
7 Seiten, 9 Bilder, 8 Quellen
Conference paper
English
Soil-Structure Interaction of Subsurface Conduits
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Minimum cover for buried flexible conduits
| Engineering Index Backfile | 1968
A design approach for circular buried conduits
| TIBKAT | 1976