A refined model for beam elements and beam-column joints

To improve the accuracy of finite element modeling of concrete frame struct ures, a new beam-solid transition element with refined characteristics is i ntroduced. The refinement capability in this approach provides an accurate strain field approximation in the regions of high shear forces of beam and columns. Finite element formulation has been extended for material nonlinea rity and large deformations to account for ultimate loads and secondary eff ects. In an example the accuracy and efficiency of this technique in analys is of beam-column joints is shown and the results compared with an alternat ive numerical approach. (C) 2000 Elsevier Science Ltd. All rights reserved.