Dynamic characterization of a 3-D full scale steel-concrete ...

c,tspspb,lb,rspc,bFigure 11. Kinematic quantities relevant to an interior jointThe rotation of the web panel was determined by applying two accelerometers onan axis horizontal to the flanges of the joint’s inner profile, as shown in Figure 12. Byarranging pairs of accelerometers along an axis parallel to the beams or columns, it waspossible to determine the translational and rotational accelerations of the central point ofthe section. The supports for the accelerometers were fashioned in such a way as toincrease the distance of the accelerometer from the structure’s axis, thereby increasing theintensity of the corresponding accelerations.B 11B 12C 11C 12B 7B 5B 19C 7C 5B 4B 3C 4C 3C 20B 8B 20C 8B 15B 2B 16AccelerometerPCB 393B12AccelerometerPCB 393CC 15a) b)C 2C 16Figure 12. Accelerometer lay-out: a) configuration B for the interior joint;b) configuration C for exterior jointFigures 13 and 14 indicate the accelerometer locations for the local tests of theinterior and exterior joint, respectively. Tables 2 and 3 in Annex A provide a completeschematic arrangement, with the location of the instrumentation and details of the devicesused for fixing the accelerometers to the structure.12