| Titre : | Collapse assessment of steel moment frames based on E-defense full-scale shake table collapse tests (2013) |
| Auteurs : | Dimitrios G. Lignos, Auteur ; Tsuyoshi Hikino, Auteur ; Yuichi Matsuoka, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of structural engineering (Vol. 139 N° 1, Janvier 2013) |
| Article en page(s) : | pp. 120–132 |
| Note générale : | Génie Civil |
| Langues : | Anglais |
| Tags : | Collapse Component deterioration Full-scale collapse tests Steel structures Local buckling Strong-column/weak-beam ratio Exposed column bases simulation Sidesway |
| Résumé : | This paper presents key parameters that affect numerical modeling of steel frame structures for reliable collapse simulations. The collapse assessment is based on experimental data obtained from a full-scale shaking table collapse test of a 4-story steel moment frame and a blind numerical analysis contest that was organized in parallel with the collapse test. It is shown that (1) there is no clear advantage between three-dimensional (3D) and 2D analyses in the prediction of a sidesway collapse mechanism for buildings with a regular plan view as in the case of study; (2) the assumption of Rayleigh damping leads to better predictions of structural response compared with stiffness proportional damping; and (3) accurate prediction of collapse necessitates that P-Δ effects always be considered in the analysis. It is also proven that accurate simulation of steel component deterioration is a key factor for reliable prediction of collapse behavior. On the basis of a synthesis of experimental and analytical studies, a few collapse mitigation alternatives are investigated. In particular, the effects of the strong-column/weak-beam ratio and exposed base plates on the collapse capacity are assessed. It is notable that a combination of bending strength increase and delay of local buckling in first-story columns is most effective for the enhancement of seismic performance against collapse. |
| ISSN : | 0733-9445 |
| En ligne : | http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000608 |
