Comparison with measuring method of internal storey drift on shaking table test of seven-storey X-Lam building

ABSTRACT: Time-history response analysis could be obtained good information of seismic performance of timber structure building. Modelling that used of time history analysis usually based on the static test results of fasteners, walls and frames. Shaking table test is one of the effective methods to verify the reliability of model on dynamic behaviour. To verify the model’s reliability, shaking table test should be carried out in consideration of the weight of test building, acceleration of each layer and internal story drift of displacement. To measure internal story drift is rather difficult and important factor, because the rigid tower for measuring displacement within the table as ordinary static loading test. CNR-IVALSA have been established SOFIE project on sustainable buildings used cross-laminated panels(X-LAM) and shaking table test on 7 story X-LAM building was carried out E-Defense in MIKI city on cooperation research with NIED, Shizuoka University and BRI in Japan. In this tested we could try two methods for measuring the internal story drift. One is displacement transducer setting in the building for measuring relative displacement between floor and ceiling, the other is optical displacement measuring system that optical transmitter is attached to the building and optical receiver is placed out of the table. In this report, internal story drift was compared with accumulated displacement measuring transducer in the building and difference displacement of table and optical transmitter. Optical displacement system is necessary to compensate the angle of roll, pitch and yaw on the table. Comparison with test results, long direction of building that mainly shear deformation shows good agreement of two measuring results, but short direction of building that include bending deformation shows optical displacement is larger than the accumulated displacement in the building.