contributor author | Sanjay Sahasrabudhe | |
contributor author | Satish Nagarajaiah | |
date accessioned | 2017-05-08T20:59:27Z | |
date available | 2017-05-08T20:59:27Z | |
date copyright | July 2005 | |
date issued | 2005 | |
identifier other | %28asce%290733-9445%282005%29131%3A7%281025%29.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/34572 | |
description abstract | The increase in bearing displacements of sliding isolated buildings due to near-fault earthquakes, with long-period pulse type of ground motion, is an important problem. Often, supplemental nonlinear passive dampers are incorporated into the isolation system to reduce the base displacements; however, this may increase the interstory drifts and accelerations in the superstructure. Hence, there is a need to examine whether controllable nonlinear dampers can reduce the base displacements without a further increase in superstructure response. In this study, the effectiveness of variable damping, provided by magnetorheological (MR) dampers, in reducing the response of sliding isolated buildings during near-fault earthquakes is investigated using a 1:5 scale steel two-story model. A nonlinear analytical model is developed with due consideration given to the nonlinearities of the friction bearings and the MR damper. A Lyapunov-based control algorithm is developed for control of the MR damper and the building model, and tested on a shake table. Results of passive low/high damping cases and semiactive cases are compared. It is shown that the variable damping reduces base displacements and superstructure responses further than passive low/high damping cases. | |
publisher | American Society of Civil Engineers | |
title | Experimental Study of Sliding Base-Isolated Buildings with Magnetorheological Dampers in Near-Fault Earthquakes | |
type | Journal Paper | |
journal volume | 131 | |
journal issue | 7 | |
journal title | Journal of Structural Engineering | |
identifier doi | 10.1061/(ASCE)0733-9445(2005)131:7(1025) | |
tree | Journal of Structural Engineering:;2005:;Volume ( 131 ):;issue: 007 | |
contenttype | Fulltext | |