The pilots stated he initiated a straight in approach for landing. On landing roll out, the airplane developed a shimmy and veered to the left. He applied right rudder and engaged the tail wheel lock. The airplane continued to the left, the right main wheel separated from the strut and the right strut collapsed into the cockpit. Examination of the airplane revealed structural damage to the right wing, elevator and right side of the fuselage.The pilot stated the airplane did not experience any mechanical problems prior to the accident.