Analysis on irregularity in lateral stiffness' s impact on seismic capacity of R. C. frame structures

This paper Analyzes the story yield strength coefficient ξybased on data gathered from three shaking table tests for R. C. frame structure models. The calculations show that it is feasible to apply story compound seismic capacity index β in assessing the damage of frame structures under varied magnitude. For irregularity in lateral stiffness of R. C. frame structures,irregularity in lateral stiffness has very little effect on β if a frame structure remain intact after an earthquake,but has significant impact on β in collapse stage. This paper also designs 8 simulative structures with different height of their ground floor and specifies integral modification factor ψ1according to the irregularity of structural lateral stiffness.