ESTIMATION OF MAXIMUM ROTATION ANGLES OF MEMBER IN NON-STRUCTURAL WALLS DURING EARTHQUAKES BASED ON CRACK LENGTH

In this study, a dataset of damage indicators (crack length and concrete spalling) related to the rotation angle of member of non-structural walls was established through loading tests. Additionally, a linear regression was derived to estimate the rotation angle of member from crack length, applicable to shear span ratios of 0.5, 0.57, 0.67, and 0.73. Results confirmed that the rotation angle of member can be estimated from 0.375% to 1%rad. Using semantic segmentation, non-structural wall damage images were analyzed, and crack lengths were applied to the proposed regression equation, estimating the rotation angle of member within the same range.