structural analysis of the deck of access bridges in offshore docks under dynamic loading of moving heavy vehicles (case study: 10 feet concrete deck with prefabricated beam, under the passage of 125-ton bogie)

ports are the most important economic, political and military bottlenecks. this puts shoreline structures (port) in the class of important structures and they have a crucial role in the countries’ life. pile and deck wharf and their access bridges and offshore deck (jetties), are one of the parts which are supplier of coupling between the land and the waterfront. correct and exact estimation of loads acting on individual structures leads to more accurate and more economical design. to design waterfront deck, it is necessary to estimate the amount of reaction generated in the deck by live loads due to the crossing of the machines over it. to more accurate assessment the effect of moving vehicle passing on the deck, the dynamic analysis is used to calculate the response generated in the deck. the modeling of the vehicle moving on an access bridge of pier piles and deck with the beam element-capturing method, and the d'alembert and balance principle are used to write the governing differential equation. the deck is also modeled in the form of euler-bernoulli beam, with a uniform cross-section. dynamic load modeling for dynamic analysis of the deck is done by matlab program. the main output of this research is to answer the question, that the moving vehicle passing with heavy cargo, with unconventional weight can cause what reactions in the deck? depending on the type of deck structures and military vehicles, unique results can be obtained including a new deck design, deck strengthen for existing services and changes in specific cargo trailers for safe