Experiments #1, preliminary tests on moment frame specimen

Four preliminary tests (PT01 series) were conducted prior to Hybrid Simulation-1 on the moment frame specimen. The first two preliminary tests, namely, PT01-01 and PT01-02, were conducted first to verify that (a) the displacement and force command vectors sent through OpenFresco were correctly applied by the actuators and (b) the feedback from strain gauges were properly transformed to obtain the force feedback vector. These tests were followed by two quasi-static tests, namely, PT01-03 and PT01-04, conducted mainly to obtain the flexibility of the moment frame physical sub-structure and to measure the flexibility of the support boundary conditions. The flexibility (rotational and horizontal) at the base of the east column of the physical sub-structure was obtained using the Krypton instrumentation system. This information was utilized to update the support boundary conditions of the numerical sub-structure.