Experimental Model for Double Concave Sliding Bearings

Authors:

Аджемян Арсен Adzhemyan A.
Project engineer, Gannett Fleming, Los Angeles, USA

Бензони Джанмарио Benzoni Gianmario
Research Scientist, Structural Engineering, University of California, San Diego, USA

Ломиенто Джузеппе Lomiento Giuseppe
Asst. Professor, Civil Engineering, California State Polytechnic University, Pomona, USA

Rubric: Seismic safety and seismic isolation of buildings
Key words: seismic isolation, concave bearings, single double pendulum, friction pendulum, sliding isolation.
Annotation:
This study deals with the modeling of sliding friction seismic isolation devices. Recent large-scale experimental tests confimed the need for accurate models to account for the friction performance in the ranges of loads, velocity and displacement expected during a seismic excitation. An existing experimental model previously validated for single concave isolators is here extended to double concave sliding isolators. Full-scale mono-directional tests on a set of double concave friction bearings in are used to validate and calibrate the model. The friction model includes three independent functions to account for the effcts of applied vertical load, velocity, and cycling effcts associated to heating. The applicability of the model to the double concave isolators is discussed, in comparison with earlier results of single concave isolators.

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