N77FZ

The pilot reported while entering the airport traffic pattern, the glider encountered additional lift and he was too high for landing. The pilot attempted to descend by deploying the spoilers and performing a couple of 360 degree turns, however the glider did not lose altitude so he initiated a slip to lose the altitude. Just prior to touchdown, as he aligned the glider to runway heading, it stalled and landed hard. During the landing roll, the right wing struck the ground and the glider ground looped. The glider sustained substantial damage to the fuselage and the empennage. The pilot reported no mechanical malfunction or anomalies that would have precluded normal operation, prior to the accident.