RED-ACT: Real-time Earthquake Damage Assessment using City-scale Time history analysis

Real-time Earthquake Damage Assessment using City-scale Time history analysis (RED-ACT)

Scientific Background of This Report

An accurate and rapid assessment of seismic damage can provide an important reference for emergency rescue and post-earthquake recovery. Based on the city-scale nonlinear time-history analysis and dense-distributed strong motion network, a real-time regional time-history analysis method is proposed in this work. In this method, the actual ground motion records obtained from seismic stations are input into the building models of the earthquake-stricken area, and the city-scale nonlinear time-history analysis of these models is subsequently performed. The seismic damage of the buildings in the target region subjected to this earthquake is evaluated according to the analysis result. Consequently, (1) The uncertainty problem of ground motion input is solved properly with the proposed method based on the real-time ground motion obtained from the seismic stations; (2) The amplitude, spectrum, and duration characteristics of ground motions as well as the stiffness, strength, and deformation characteristics of different buildings are fully considered in this method based on the nonlinear time-history analysis and multiple-degree-of-freedom (MDOF) models; (3) Using the real-time city-scale time-history analysis and the corresponding report system, the assessment of the earthquake destructive power can be obtained shortly after the earthquake event.