A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Deformation Fields with Regard to Laterally Loaded Pile Groups in Clay. Centrifugal Tests on Laterally Loaded Model Piles Fixed in Clay
In order to achieve a better understanding of the interaction effect for pile groups in clay, parametric studies and centrifugal model tests have been carried out. The model tests were carried out in the large centrifuge at the Danish Engineering Academy. Single piles and groups of two piles were tested with a maximum lateral load of 300 kN. All piles were fixed at the pile cap. In order to monitor the load transfer and distribution within the pile group, pile fittings (shear load transducers) were used for measurement of lateral loads in the piles at the pile cap. Most of the tests were carried out at 75 g. A few tests at 1 g were used to test the validity of the scaling laws. Simple group effect factors are estimated, and the results are compared with existing theories to evaluate the group effect (Poulos and Davis, 1980), which seems to be overestimated. This discrepancy between test results and theory is mainly due to the common adoption that the clay (at small lateral deflection) behaves as a linear-elastic material, which is not true as revealed by the model tests. Cyclic loading was found to have some softening effect on the response of the pile-soil system at the level of lateral load used in the tests. This result is compared with similar model tests in sand, where cyclic loading was found to have a hardening effect.
Deformation Fields with Regard to Laterally Loaded Pile Groups in Clay. Centrifugal Tests on Laterally Loaded Model Piles Fixed in Clay
In order to achieve a better understanding of the interaction effect for pile groups in clay, parametric studies and centrifugal model tests have been carried out. The model tests were carried out in the large centrifuge at the Danish Engineering Academy. Single piles and groups of two piles were tested with a maximum lateral load of 300 kN. All piles were fixed at the pile cap. In order to monitor the load transfer and distribution within the pile group, pile fittings (shear load transducers) were used for measurement of lateral loads in the piles at the pile cap. Most of the tests were carried out at 75 g. A few tests at 1 g were used to test the validity of the scaling laws. Simple group effect factors are estimated, and the results are compared with existing theories to evaluate the group effect (Poulos and Davis, 1980), which seems to be overestimated. This discrepancy between test results and theory is mainly due to the common adoption that the clay (at small lateral deflection) behaves as a linear-elastic material, which is not true as revealed by the model tests. Cyclic loading was found to have some softening effect on the response of the pile-soil system at the level of lateral load used in the tests. This result is compared with similar model tests in sand, where cyclic loading was found to have a hardening effect.
Deformation Fields with Regard to Laterally Loaded Pile Groups in Clay. Centrifugal Tests on Laterally Loaded Model Piles Fixed in Clay
H. Foged Pedersen (author) / J. Dannemand Andersen (author) / F. Haahr (author)
1989
114 pages
Report
No indication
English
Laterally Loaded Piles in Clay
| British Library Conference Proceedings | 1992
Analysis of laterally loaded piles in clay
| British Library Conference Proceedings | 1991
Dynamic Response of Laterally Loaded Pile Groups in Clay
| Online Contents | 2013
Centrifuge Model Study of Laterally Loaded Pile Groups in Clay
| Online Contents | 2004
Centrifuge Model Study of Laterally Loaded Pile Groups in Clay
| British Library Online Contents | 2004