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Detailed accident analysis of a tower failure in Henan was got in this paper. A strain test system was established, location of measuring point was determined at the same time. Long-term monitoring test of the strain value of the 3# experimental tower in the test base of transmission line in electric power of Henan was accomplished. Analysis of the test data under wind-induced vibration lays the data foundation for preventing the damage of wind and disaster in Henan power system.

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