Papers by Arsen Adzhemyan
The extensive results collected from prototype tests of Seismic Isolators and Energy Dissipators ... more The extensive results collected from prototype tests of Seismic Isolators and Energy Dissipators are only partially utilized to support structural models and design procedures, which often rely on a number of assumptions and simplifications that may significantly affect the prediction of the structural performance. It must be recognized that a major difficulty for engineers is the translation of results of lengthy and expensive experimental programs into design tools. Tests are, in fact, often proposed for a "macroscopic" validation of devices’ performance. The experimental approach is somehow still evolving from what was traditionally required for elastomeric bearings, with the attempt to "adapt" requirements to devices of completely different concepts. Acceptance criteria enforced by codes often show lack of consistency with design approaches and goals. Examples will be proposed to support the need for ad-hoc designed testing protocols that can provide clear in...
World Conference on Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures Proceedings, 2019
Dr. Giuseppe Lomiento Civil Engineering Department Master's Degree in Structural Engineering Expe... more Dr. Giuseppe Lomiento Civil Engineering Department Master's Degree in Structural Engineering Experimental Model for Double Concave Sliding Bearings by Arsen ADZHEMYAN This study focuses on the performance of sliding friction seismic base isolation systems. Full-scale mono-directional tests are performed on double concave friction bearings in accordance with ASCE7-10 testing protocols. An existing experimental model for a sin gle pendulum isolators is extended to double concave sliding bearings. The friction coefficient model is represented in terms of the applied vertical load, velocity, and cy cling. Independent functions for each of these effects are calibrated and validated using test data to represent the observed variations in variations in friction coefficient. The applicability of the model to the double concave isolators is discussed, in comparison with earlier results on the single concave isolators. The feasibility of use of experimen tal data from current testing protocols for the calibration of the model is also addressed, and recommendations are provided.
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Papers by Arsen Adzhemyan