A new index for single damage detection in beams using static responses data

In this paper, a new index has been proposed for single damage detection in beams. The index is defined using static responses obtained for healthy and damaged beam. Using this index, the capabilities of static responses data for finding the location and severity of damage in Euler-Bernoulli beams are assessed. Static responses of a beam are obtained using the finite element modeling. In order to reduce the number of measured nodal displacements, the beam deflection is fitted through a polynomial function using a limited number of nodal displacements. The influence of many parameters may affect the efficiency of the method such as the number of elements, the value, type and location of applied load as well as noise effect is investigated. Two test examples including a simply supported and an overhanging beam are considered. Numerical results show that using this index, the locations of single damage cases having different characteristics can be well determined

Keywords:

New index , beam structure , static response , damage characteristic