Semi-Active Control of Precast RC Columns under Seismic Action

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Caterino, Nicola^1,2 ; Spizzuoco, Mariacristina^3

Department of Engineering, University of Napoli Parthenope, Centro Direzionale, isola C4, Naples

80123, Italy^1

Construction Technologies Institute, National Research Council (CNR), San Giuliano Milanese, Milan, Italy^2

Department of Structures for Engineering and Architecture, University of Napoli Federico II, Via Claudio 21, Naples

80125, Italy^3

关键词: Demand reduction;    Dissipated energy;    Instantaneous response;    Magneto-rheological dampers;    Seismic behaviour;    Semiactive control;    Structural component;    Variable dampers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022039/pdf
DOI  :  10.1088/1757-899X/245/2/022039

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

This work is inspired by the idea of dissipating seismic energy at the base of prefabricated RC columns via semi-active (SA) variable dampers exploiting the base rocking. It was performed a wide numerical campaign to investigate the seismic behaviour of a pre-cast RC column with a variable base restraint. The latter is based on the combined use of a hinge, elastic springs, and magnetorheological (MR) dampers remotely controlled according to the instantaneous response of the structural component. The MR devices are driven by a SA control algorithm purposely written to modulate the dissipative capability so as to reduce base bending moment without causing excessive displacement at the top. The proposed strategy results to be really promising, since the base restraint relaxation, that favours the base moment demand reduction, is accompanied by a high enhancement of the dissipated energy due to rocking that can be even able to reduce top displacement in respect to the "fixed base rotation" conditions.