Structural Health Monitoring and Damage Localizationin a four-storey Benchmark Structure

A structural damage detection method integrating the damage locating vector (DLV)method and ARMAV model for system identification of frame structures has been exploredin this paper. The concept of the DLV method is to identify the members with zero stress undersome specific loading patterns derived from the changes in flexibility matrix of the structurebefore and after the damage state. Success of the DLV method requires clear identificationof the flexibility matrix for at least the first few dominant modes. In this study, a fourstoreysteel frame with diagonal bracings is considered as the objective building. The damagecondition of the structure is simulated by partially removing some of the diagonals. With theflexibility matrices of both the intact and damaged structure identified from seismic structuralresponses, results indicate that the damaged locations can be successfully identified by theDLV method if sufficient modes of vibration are taken into account in the realization of theflexibility matrices. The feasibility of using DLV method for damage detection of frame structures using seismic response data is confirmed

Keywords:

Damage Detection , Damage Locating Vector (DLV) , ARMAV Model , System Identification , Flexibility Matrix