Abstract: Structural damage detection techniques using time domain vibration responses are of interests in structural health monitoring. Two structural characteristic vectors (SCVs) defined by cross correlation functions of time domain vibration responses, i.e. inner product vector (IPV) and cross correlation function amplitude vector (CorV), as well as the corresponding damage detection technique are reviewed. In order to utilize more information in the correlation functions, the two SCVs are then generalized to several derived SCVs, and the damage detection procedure using data fusion technique with these SCVs is also proposed to enhance the accuracy of the damage detection results. The damage detection results of an experimental 8-storey shear frame structure show that the small damage in the frame structure can be located by the proposed method.