Effect Of Soil Elasticity Module On Dynamic Performance Of Concrete Piles in Bridges Under Earthquake Loading

Earthquake is one of the most destructive phenomena in nature. Iran is located on the high risk zone of world earthquake chain and suffered serious damages and dilemma in last few decades. The number of serious earthquakes in coastal areas in the last few years has been considerable ((e.g. Occurrence of recent earthquakes in Bandarabbas and Gheshm). Usually for pile structures inclined pile performance against lateral loading is better than vertical ones. However their design and construction are difficult. Therefore the vertical marine piles are more common structural elements to handle and conduct different environmental loadings through deep sea bed level where the soil provides enough strength as a safe foundation. Although this subject has importance in both application and engineering, less attention and research is made on it. In this study the nonlinear behaviour of vertical marine piles and soil under earthquakes has been investigated, using Plaxis Software. The soil parameter (such as and ) in this study the nonlinear behaviour structure and soil have been modelled. Soil parameters are obtained based on local boreholes and laboratory analysis. This data used as input to the model together with earthquake loading. Running model for a critical condition of lateral and vertical dynamic loading for a sample marine pile, the times histories of pile lateral and axial displacement was obtained. This information can be used for optimum design of vertical piles for marine structures in costal zone.

کلیدواژه ها:

Elasticity Module ، Soil ، Marine Pile ، Earthquake Loading