Experimental study of interactions between multi-directional focused wave and vertical circular cylinder, Part I: Wave run-up

► We studied the multi-directional focused wave run-up on a vertical cylinder. ► We investigated the impacts of wave parameters on the wave run-up. ► The focused wave run-up increased as wave steepness, frequency bandwidth increased. ► A unidirectional wave can generate larger wave run-up than a multidirectional wave. ► The wave parameters also impacted the wave run-up distribution around the cylinder.