According to the pilot, he was conducting a touch-and-go landing on an asphalt runway oriented 090 degrees. After a normal landing, he added full power for takeoff, and the airplane veered to the left. The pilot attempted to correct with right rudder, and also pulled back the throttle; however, the airplane departed the left side of the runway, and impacted the ground near a drainage ditch. The airplane's right main and nose landing gears separated, and the right wing was substantially damaged. Examination of airplane by a Federal Aviation Administration inspector did not reveal any mechanical malfunctions; nor did the pilot report any. The pilot reported that the weather at the time of the accident included light wind from about 160 degrees at 4 knots, and light rain.