... Safety in the PBD, respectively. SELECTION OF PRINCIPAL DIRECTIONS IN SEISMIC ANALYSIS During an earthquake event, at any location and any time instant, three ground motions, which are perpendicular and uncorrelated with each, generally exist. If these three directions remain constant during...

... ABSTRACT A new kind of true tri-axial testing apparatus was used to carry out series of tests to study the stress-induced anisotropy of soils under complex stress state. The loads were applied from major principal and minor principal directions respectively to investigate the different stress...

..., wave energy and principal direction during each typhoon process were obtained, and the distribution of wave energy along with direction at the moment of maximum wave heights was also hindeasted. INTRODUCTION Design parameters for offshore engineering constuctions in the coastal areas under...

... of the cylinder diameter. The wave forces in the principal direction for a two-cylinder array are almost the same as those acting on an isolated cylinder when the spacing is twice of the diameter. However, they tend to increase with decreasing distance between the cylinders and clear differences are confirmed...

... to evaluate the first order motions of the platform in directional waves. The influences of the spreading parameter for head sea conditions and of the principal direction of wave incidence are investigated. Finally, short-term analysis is performed to evaluate the effects of wave spreading and of the wave...

... coefficients. koterayama laboratory experiment force coefficient wave force prediction method wave force cylinder platform formula random wave record wave force coefficient circular cylinder time series field experiment test cylinder experiment orbital velocity principal direction...