Premium
Physical model for dynamic analysis of structures with FPS isolators
Author(s) -
Almazán José L.,
Llera Juan C. De la
Publication year - 2003
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.266
Subject(s) - isolator , structural engineering , bridge (graph theory) , deformation (meteorology) , pendulum , engineering , orientation (vector space) , software , element (criminal law) , mechanical engineering , computer science , geology , geometry , electronic engineering , medicine , oceanography , mathematics , law , political science , programming language
This article presents a physical model for frictional pendulum isolators (FPS) that is ready to be implemented in most commercial software. The model is capable of accounting for effects such as large deformations, sticking, and uplift and impact by sensing the normal loads in the isolators through a gap element. Sticking has been incorporated into the model by extending the Park–Wen hysteretic model to the case of large deformations. The proposed model has been tested against a theoretically ‘exact’ formulation leading to essentially identical results. To facilitate its use, the physical FPS model has been cast into a typical non‐linear structural element format, i.e. with deformation as input and restoring force as output. Examples of a building and a bridge have been chosen to show the potential of the element and to provide further insight into the earthquake response of structures with FPS isolators; in particular, in aspects such as the orientation in placement of the isolator, sticking, P − Δ, and other large deformation effects. Copyright © 2003 John Wiley & Sons, Ltd.