چكيده به لاتين
The damage detection in the existing structures in the recent decades is one of the main problems that the civil engineers have encountered with. Deciding whether to use, repair or abandon a structure, requires detecting, localizing and qualifying the damage on the structure. Therefore, a precise localization and qualification of the damage, plays an important role in making a proper decision about the desired structure.
On the other hand, the cable-stayed bridges are flexible and vulnerable structures and also typically are designed for a long-term use. Therefore, the health monitoring of the cable-stayed bridges is compulsory for creating a secure transportation link.
In this thesis, the first part is designated to the detection and localization of the damage, using the damage detection methods based on the modal informations obtained from the finite element model of the bridge.
These methods included the Enhanced Coordinate Modal Assurance Criterion, Mode Shape Curvature Method, Modal Flexibility Index Method, Damage Index Method.
In the second part, we will focus on identifying the damage by defining the damage quantification as a modal updating issue with modal data, solving it by Democratic Particle Swarm Optimatization algorithm (DPSO), and regarding an objective function based on the flexible modal.
Finally, we will concentrate on the usage of given ways in different situations such as random noise in inputs and incomplete modal data.
Keywords: Structural Health Monitoring, Modal-Based Damage Detection Methods, Cable-Stayed Bridge, Democratic Particle swarm optimization algorithm
