2008 Volume 14 Pages 289-294
In this paper, fluid forces acting on a block on step in state of incomplete overflow were investigated. The fluid forces in the model tests of the acrylic cube set on the edge of the step and in the field case of the natural stone set in the falling work were investigated. An estimation method of drag force was proposed through the consideration on the pressure profiles for downstream surface of block and the momentum equation. Both an appearance of void part in the downstream plane of block and pressure profile of the downstream plane of the step significantly influence on fluctuation of drag force. It is shown that the calculated results are agreed with the experimental results.
On the basis of investigations, the approximated equations of fluid forces were derived, and the design method for masonry falling works was proposed..
