Deterioration Effect Assessment of Babolsar Bridges Considering Urban Structure by Multi Criteria Decision Making

Bridges by any design, and any materials, signs of wear will be appear sooner or later, but several factors such as climate situation, flood or earthquake, increasing in overloading, design quality and performance and kinds of materials effect on kind and rate of this wear and development rate. Regardless to these factors can cause decreasing useful life of structures and/or their destruction. Base on critical role of bridges in civil structures and also possibility of destruction of each bridge from civil structure view is necessary. In this research we investigate role of Babolsar bridges and their effectiveness on civil structure in this city. In order to these factors such as cost of destruction, environmental losses, the importance of road and death caused by the destruction of bridges were investigated. And finally base on estimating all parameters by VIKOR multi criteria decision method that is a modern methods in multi criteria decision, use priorities main bridges in Babolsar from urban structure. Obtained results from evaluating bridge's situation, show that first bridge of this city from urban structure is very important and must be considered carefully and should be repair and maintenance priory.