Two new simplified adaptive load patterns for pushover analyses are proposed, able to provide an accurate and on safe side assessment of the actual non linear dynamic response, by enveloping the results provided by using the two load vectors. Initially it will be shown how the input modelling can affect the assessment of the response parameters in Non-Liner Response History Analysis (NRHA), which will be assumed as benchmark to judge the effectiveness of the proposed load patterns. Then, the two new load patterns are presented and their effectiveness in reproducing the results provided by NRHA are compared with those of invariant and adaptive load patterns suggested by seismic codes and proposed in literature, for two structures of different typologies. To this aim, criteria for choosing target displacement in POA are shortly discussed.