In the present work nonlinear finite element analysis has been used to predict the load deflection behavior of composite frame under different static load conditions by using ANSYS (ANalysis SYStem) (version 9) computer program. The materials nonlinearity due to cracking, crushing of concrete, and yielding of steel structure (tube or I-section) are taken into consideration during the analysis. Different composite members (beams and columns) have been analyzed and their results are compared with experimental data and found to give good agreement. In the present study three types of frames (composite frame composed of concrete filled steel tube members, composite frame composed of concrete encased steel members, and reinforced concrete frame) with same cross section area of steel and concrete have been investigated in the present analysis.