In this paper, the seismic performance of bundled-tube structures in high-rise steel buildings was assessed under near-field earthquake records through conducting of nonlinear dynamic time history analyses. Three different structural modulations were selected and designed for the resistant skeletons of the studied bundled-tube structures with symmetric plans including 20, 30 and 40 story frameworks, based on the Iranian seismic code 2800 (fourth edition) and the Iranian national building code (Issues 6 and 10). The results were assessed based on the changes in the story lateral displacement and the seismic drift, which were chosen as two significant parameters in structural design process. The story drift variation under the influence of near-field earthquake records containing velocity pulses is more evident in the response of the taller studied structures, especially at higher floors. In addition, this behavior can be observed clearly in the dynamic response of the studied structures with uniform skeletal modulation. The existence of large ductility demands is confirmed according to the analytical assessment of the formation of dynamic displacement mode under powerful earthquake records and the formed plastic hinges mechanisms in the resistant skeleton. By approaching high-amplitude coherent velocity pulses, the characteristics of seismic behavior of the studied structures become intensively nonlinear.