Structural displacement amplification factor (DAF) is the key factor in seismic design, which is used to predict maximum inelastic deformations of structures under earthquake excitation. However, DAF hasn’t been introduced in the current Chinese seismic design code. In this paper, 15 RC frame buildings which are 3-, 5-, 8-, 10-, 12-story buildings in different seismic fortification intensity VI, VII, VIII are designed according to the Code for Seismic Design of Buildings GB 50011-2010. The FE models of these buildings are modeled and structural seismic response is analyzed. Shaking table test of a RC frame structure has been accomplished and the FE models are verified and validated. The “demand” values of the structural DAF of these RC frames are evaluated by dynamic capacity spectrum method, and the analysis results are compared with that analyzed by traditional static capacity spectrum method. For the designed RC frames in the seismic fortification intensity VI, VII, VIII zones, the ranges of demand values of structural DAF are 0.51~1.91、0.49~1.93、0.56~2.24 respectively when they are under fortification earthquakes．The ranges of demand values of structural DAF are 1.18~4.05、1.33~3.45、1.42~2.66 respectively when they are under rare earthquakes．The overall yield of the codified designed RC frames under fortification earthquakes has not occurred, and it is shown that Chinese seismic design code is conservative.