The destructive earthquakes and structural damages reveal the importance of therules of earthquake-resistant structural design. The need of update and renewal ofthese rules periodically become inevitable as a result of scientific developments, in novations in construction technologies and building materials. Turkey which is anextremely region in terms of seismicity was adapted to these changes through time.The last five seismic design codes (1968, 1975, 1998, 2007 and 2018) were takeninto account within the scope of this study. The differences in dimension and materialgrades of structural elements such as columns as beams have been compared in de tail for each code. Three different analysis types have been performed for a 4-storyreinforced-concrete model such as eigenvalue, pushover and dynamic time-historyvia the minimum conditions for these elements in each code. The natural vibrationperiod of the building was obtained with empirical formulas stipulated in differentcodes for the sample RC building, additionally. The size and the type of the materialsused in beams and columns within the last five codes have been changed. We see thatthe changes in these two important parameters which affect the behavior of buildingsduring an earthquake, enhance the performance of the building. It has been revealedthat changes and renewals in seismic design codes are a necessity and gain. It hasbeen clearly revealed that each amended code increases the stiffness and enhancethe seismic capacity of a structure. Each updated seismic design code is aimed tocomplete the deficiency of the previous one. The results revealed that there arechanges to be made to increase the seismic capacity of the structure at the point ofreducing earthquake damage.