Bibliographical references =========================== 1. P. PENSERINI: "Modeling bolted connections in truss towers" Note EDF /R & D HM-77/93/287 2. P. PENSERINI: "Characterization and modeling of the behavior of metallic structure-foundation bonds" Doctoral thesis from the University of Paris 6, 1991 3. J. P. LEFEBVRE, P. MIALON: "Quasi-static nonlinear *Code_Aster* algorithm" Note EDF /R &D HI-75/7832