NONLINEAR SEISMIC ANALYSIS OF BASE ISOLATED MDOF STRUCTURES | ||
| The International Conference on Civil and Architecture Engineering | ||
| Article 23, Volume 6, 6th International Conference on Civil and Architecture Engineering, May 2006, Pages 1-11 PDF (267.36 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/iccae.2006.45787 | ||
| Authors | ||
| HUSSEIN MEGAHED1; ABDEL-MAGUID KHAFAGI2 | ||
| 1Associate Professor, Structural Engineering Department, Cairo University. | ||
| 2Graduate Student, Structural Engineering Department, Cairo University. | ||
| Abstract | ||
| Seismic isolation elastomeric bearings in buildings and bridges have proven to be a very effective passive method for reducing earthquake-induced forces by lengthening the period of vibration of the original fixed base structure in conjunction with increasing the damping ratio. In the present study, four structures have been investigated using a selected set of actual strong earthquake time histories at the base. The time histories were scaled using an appropriate scaling method. The structures rang between two story (stiff) up to eight story (flexible) superstructures based on stiff soil. The isolation systems are described by ten different generic nonlinear hysteretic models, which are representative of wide range of elastomeric isolation systems. A computer program has been developed. It has the capability to implement the modeling of the various mechanisms of interest. The comparative results show a comprehensive seismic performance of base isolated structures. Finally, the isolated structures have been compared with the fixed base structures. | ||
| Keywords | ||
| Earthquake engineering; base isolation; elastomeric bearing; Nonlinear Analysis; time history | ||
|
Statistics Article View: 123 PDF Download: 201 |
||
