Modified Direct Stiffness Calculation Method for Seismic Damage Assessment of Frame Structures
YANG Yang1; ZHOU Xiyuan 2; JIN Guofang 1; LIU He(M. ASCE)3
1.Research Institute of Structural Engineering and Disaster Reduction in College of Civil Engineering, Tongji University, Shanghai, 200092;2.Beijing Key Laboratory of Earthquake Engineering Structural Retrofit, Beijing University of Technology, Beijing, 100124;3.University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA
Abstract：An improvement to the Direct Stiffness Calculation (DSC) method for bending-type frame structures, which can be used to carry out damage assessment, and corresponding System Identification toolbox in platform of OpenSees is proposed in this paper. The proposed improvement is a simple, but apparently quite effective, the modification of the DSC method for damage detection, and the System Identification toolbox could be applicable to practical bending-type frame structures. Research on the benchmark test of a 12-story reinforced concrete frame model on shaking table in Tongji University, a simulation model for the benchmark test under excitation of several seismic waves was evaluated to verify the modified DSC technique and the System Identification toolbox. The results show that the preliminary assessment using the improved direct stiffness method and the corresponding System Identification toolbox are feasible and efficient in the damage detection of bending-type structures.
2011, Vol. 30 
