Stress wave propagation in reinforced concrete piles during driving

Stress wave propagation in reinforced concrete piles during driving

Zorn, N.F.

Civil Engineering and Geosciences

Design & Construction

1983-12-31

The aim of this report is to give an insight into what happens in a reinforced concrete pile during driving, and to contribute to design requirements for the loading case pile driving. Since the behaviour of stress waves in piles is influenced by a various number of parameters, the fewest of which result in linear relations, models are presented to calculate the initial stress wave, the reflection at the pile tip and the behaviour at a crack in the concrete. These models lead to differential equations that can be solved analytically for assumed linear material behaviour. This allows to follow the stress wave in the pile to every point and time of special interest. Case studies for different wave shapes are presented and the influence of nonlinearities discussed. Nonlinear material behaviour may be introduced, however this makes numerical solutions necessary and requires quantitative knowledge of the different parameters. Special interest is given to reflected tensile waves that may lead to cracks in the concrete. Different crack criteria are discussed and the steel stress in the reinforcement crossing the crack is calculated. The necessary amount of reinforcement then can be evaluated.

http://resolver.tudelft.nl/uuid:dd9a0135-46b0-4a2b-8c15-464b4f3c9c00

Delft University of Technology, Faculty Civil Engineering and Geosciences

Report Stevin Laboratory, Concrete Structures 5-81-21

Institutional Repository

report

(c) 1983 Zorn, N.F.
Delft University of Technology, Civil Engineering and Geosciences