Structures under repeating loading conditions undergoes crack or damage in over stressed areas. To ensure the safety of the structures, it is important to know whether their members are free of cracks and should any be present, to detect their location and provide safety measures. Transverse crack is a common occurrence present in FixedFixed Beam. The development of crack in a beam leads to catastrophic failure, which will affect the local stiffness of the beam. Structural Health Monitoring gives the promise for improving the structural performance with excellent results. Condition monitoring by using vibration analysis is a technique used in health monitoring in the damage detection. The objective of this study is to obtain information about the depth of cracks in cracked beams. For this purpose, the Experimental modal test is done to analyse the vibration signals. The natural frequencies at different mode shapes in defectfree and cracked beams were compared. The results of the study suggest determining the depth of cracks by analysing the vibration signals. Experimental results and simulations obtained by the FEA software ANSYS are in good agreement.
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