The integrity of beam-column joints in reinforced concrete (RC) frames,especially in a crucial zone, is essential for the satisfactory performanceof the whole structure. Therefore, the behavior of external connectionsbetween beams and columns is a significant parameter affecting theperformance of such R.C frames. An important influence in this regard isthe concrete compressive strength, joint reinforcement and relativestiffness of beam and column in each connection, which is itselfdetermined by considerations of geometry and reinforcement percentage.To contribute to a better understanding of the behavior of external beamcolumnjoints made of high strength concrete a theoretical study basedon the Non-linear finite element analysis is usually appropriate. ANSYS10[17] software package was used to perform the analysis using theavailable Solid 65 3-D reinforced concrete element with reinforcingbars. 26 specimens were considered and analyzed. The main parameterswere, the details, type and amount of joint reinforcement, the type andamount of beam and column main reinforcement in the joint, the level ofaxial column load and the concrete strength .The Obtained results wereanalyzed and discussed. The results were also compared with theobtained results using some available formulae found in the literature.Finally beneficial conclusions and some design recommendations wereoutlined and given.