The　maximum　of　each　column　of　flexibility　curvature　matrix　constructed　from　flexibility　matrix　is　presented　as　a　new　indicator　FCM　for　damage　detection.　The　numerical　simulations　indicate　that　the　damage　location　in　structures　can　be　identified　by　FCM　for　cantilever　beams,　fixed　supported　beams,　simply　supported　beams,　continuous　beams　and　so　on　without　baseline　modal　parameters.　Not　only　simple　damage　but　also　multiple　ones　can　be　detected　with　satisfactory　precision　by　FCM　using　only　a　few　of　the　lower　frequency　modes.