In this paper, the preliminary design procedure of magnetorheological (MR) dampers is developed for controlling the building response induced by seismic excitation. The dynamic characteristics and control effects of the modeling methods of MR dampers such as Bingham, biviscous, hysteretic biviscous, simple Bouc-Wen, Bouc-Wen with mass element, and phenomenological models are investigated. Of these models, hysteretic biviscous model which is simple and describes the hysteretic characteristics, is used for numerical studies. The capacity of MR damper is determined as a portion of not the building weight but the lateral restoring force. A method is proposed for optimal placement and number of MR dampers, and its effectiveness is verified by comparing it with the simplified sequential search algorithm. Numerical results indicate that the capacity, number and the placement can be reasonably determined using the proposed design procedure

• 민경원(단국대학교 건축공학과 부교수, 공학박사) | Min, Kyung-Won 책임저자
• 이상현(서울대학교 공학연구소 객원연구원, 공학박사) | Lee, Sang-Hyun
• 이루지(단국대학교 건축공학과, 석사과정) | Lee, Roo-Jee