Evaluating the Stiffness Deterioration of Slab Structures Using Deformed Shape Data

Abstract

This study presents a diagnostic technique using simply node displacement to identify the loss of stiffness of slab structures, with the goal of advancing efficient building health monitoring approaches. The method is based on the correlation of slab deformation measurements made in two damaged and undamaged states. To be more precise, the diagnostic signs DAC and DBI are frequently employed to assess whether decreased stiffness is present. To test the sensitivity of the indicators in detecting slab damage, various failure scenarios are assumed. The findings show that the derived diagnostic indices based on the nodal displacement of the homogeneous slab examined in this work can be used to detect and locate the local stiffness deterioration of slab structure.