Seismic vulnerability assessments of buildings after several earthquakes have confirmed that the pounding could be one of the key threats. The pounding among series of neighbouring building structures throughout earthquakes exerts repeated strikes on each other that could be a reason for structural damages ranging from light damage to even collapse. So, the main objectives are to provide constructive suggestions for code calibration through a numerical simulation for the estimation of the pounding risks on series of neighbouring buildings separated by minimum code-specified separation. A numerical simulation and FE analysis are developed to estimate the influence of pounding on the seismic response demands of adjacent buildings. The collision effects on 3-, 6- and 12-stories adjacent buildings are studied for different separation distances and alignment configurations and compared with a nominal model without pounding considerations. Based on the obtained results, it is concluded that the seriousness of the impact effects is influenced by the vibration characteristics of the adjacent buildings, the input excitation characteristics and whether the building is exposed to one- or two-sided impacts. There are additional loads caused by the pounding which leads to additional shear forces and acceleration at different story levels that do not appear in the no-pounding case.