Dynamic loads resulting from earthquake shaking have a serious impact on the foundation and structures. Shaking caused by seismic waves can cause damage to the buildings or even collapse. In the present research numerical analysis is used to investigate the dynamic behavior of sheet piles in soil and the response of adjacent structures. Two dimensional plane strain program PLAXIS (Dynamic module) is used for the present numerical modeling. Ten story reinforced concrete building rests on raft foundation is idealized as two dimensional model. The building is considered to be constructed adjacent to braced excavation in sand. Excavation is supported using sheet pile wall. 6 nodes triangular element is used to idealize soil with Mohr-Coulomb model in dynamic analysis. Interface element is used to represent the contact between the beam element and soil. The effect of excavation depth, edge distance, and penetration depth of sheet pile wall on the foundation sheet pile system is discussed. The results showed that the lateral and vertical deformations, bending moments and shearing forces of the building and foundation is remarkably increased when the building distance from excavation decreased. The foundation settlement increased by 60% when edge distance around half the excavation depth. It is also found that the deformation of the building is increased with the increase of the excavation depth. The lateral displacement at the top of building and foundation are increased by 36% and 37% respectively. When the structure is installed closed to the sheet pile wall, the maximum value of settlement and lateral deformations are obtained. It is also noticed that, both the building settlement and horizontal displacement increased by 63% and 40% respectively.