In this study, the dynamic interaction of adjacent deck on pile wharf modules is investigated by using a method of static pushover analysis. For this purpose, two different wharf modules which consist of isolated and combined 3D finite element models are implemented in the structural analysis software Sap2000. Model of the combined modules is created by using the linear link and non-linear link (gap) elements in transverse and longitudinal directions, respectively. Axial rigidity of the deck element is used to calculate the stiffness of the gap element. A gap of 10 cm in the longitudinal direction between wharf modules is considered. Linear link element is regarded for the representation of locked behavior of the modules in the transverse direction. Mode-
based static pushover analyses where dominant mode having a maximum modal participating mass ratio in the corresponding direction to the mode is deemed to adopt the shape of lateral loading are performed in two orthogonal directions of the isolated and combined models. While the distribution of plastic hinge on pile elements are compared each other for the isolated and combined models, it is seen that the combined system
gives more conservative results for Y (transverse) direction pushover analysis while the isolated system is more conservative for X (longitudinal) direction analysis. Especially in X (longitudinal) direction, the combined system effect appears prominently because of the torsion effect in the vertical direction in the fundamental mode.

Keywords: Deck on pile wharves; non-linear link (gap) elements; non-linear static pushover analysis; finite element model; mode-based static pushover analysis.