Elia Efraim

Studying the standard's requirements for elastomeric seismic isolators by virtual testing

Modern international standards to end products include a complex of requirements to parameters, materials, performance, and methods of control and acceptance. Development and implementation of standards in practice requires studying of them by a wide range of experts in areas of development of these products, manufacturing techniques, control and acceptance, as well as in areas of their final application. The new standard EH15129 “Antiseismic devices“ includes requirements to elastomeric isolators which are widely applied in seismic protection systems of bridges and other civil structures. Requirements to isolators are provided as results of tests in regimes closest to operational. In this paper we propose a method for studying the requirements of the standard by virtual testing of seismic isolators virtual models. At these virtual tests the time‐varying actions are reproduced according to the standards requirements (constant, ramp, triangular, and sinusoidal). Virtual models of isolators allow to realize their main properties that affect the test results, such as non‐linear elasticity, scragging, damping, creep, and elastic‐plastic behavior. For realization of the method, a Simulink environment of MatLab is adopted, allowing to reproduce virtual testing in the form closest to the real tests. The set of virtual models for tests has been created and presented in the form of virtual laboratory which includes library of models of isolators, library of loadings and library of measuring tools. An example of virtual standard tests of commercially available seismic elastomeric isolator is presented in the paper.