The Earthquake Engineering Online Archive

Nonlinear static and dynamic analysis of reinforced concrete subassemblages

Filippou, Filip C.; D'Ambrisi, Angelo; Issa, Ahmad M.

UCB/EERC-92/08, Earthquake Engineering Research Center, University of California, Berkeley, 1992-08, 184 pages (517.5/F54/1995)

This study is devoted to the development of improved models and methods for predicting the nonlinear static and dynamic response of reinforced concrete frames. New models for reinforced concrete girders were proposed in an earlier study. Each girder was decomposed into a number of subelements, which were connected in series. Each subelement describes a different source of inelastic deformation and energy dissipation in reinforced concrete members. This study introduced several new subelements. The first is a shear subelement which describes the deformation due to shear and, in particular, due to the shear sliding in the subelement of the earlier study. The other subelements refer to the hysteretic behavior of RC columns and are extensions of the corresponding girder subelements to account for the effect of axial load on the flexural and shear behavior of the member. The proposed reinforced concrete frame models are implemented in a special purpose computer program for the nonlinear static and dynamic analysis of reinforced concrete frames. A nonlinear solution method, which accounts for the possible unbalance of internal forces between the different subelements during the load step and an algorithm for the efficient numerical implementation of this solution strategy was already proposed in the earlier study. This procedure is extended to include the additional subelements, but, more importantly, to address time varying loads due to ground acceleration. Analytical results are compared with experimental information from beam-column subassemblages under cyclic deformation reversals.

Available online: http://nisee.berkeley.edu/documents/EERC/EERC-92-08.pdf (16 MB)