Civil Engineering Commons^™

Experimental Validation Of Multistep Quantitative Crack Damage Assessment For Truss Structures By Finite Element Model Updating, Soon Lee, Gunjin Yun, Mohammad Rahimi, Shen Shang

Gunjin Yun

In this paper, a multistep damage quantification method has been experimentally validated by quantifying crack damage of load-carrying members of truss structures based on experimental vibration records. Damage quantifications are still challenging tasks for difficulties in interpreting response signals measured from engineering structures. Open crack depth is parameterized as a damage variable. The open crack in Euler–Bernoulli beam element is modeled by introducing local flexibility coefficients to the uncracked beam element with joint rotational flexibility. Mode shapes and natural frequencies measured from experimental modal testing of a damaged laboratory-size truss bridge are used in the finite element model updating for …