Civil-Comp Conferences

Journal: Civil-Comp Conferences

Civil-Comp Press

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Pendulum Impact Hammer Tests on Spruce Glued Laminated Timber – Preliminary Results
Cao, Alex Sixie; Lolli, Marco; Frangi, Andrea (2022)
Civil-Comp Conferences ~ Proceedings of the Fourteenth International Conference on Computational Structures Technology
In this paper, preliminary results are presented on pendulum impact hammer tests on full-scale glued laminated timber specimens with dimensions 200x200x3600 mm for the first time. For the tests, a pendulum with an effective mass of 3500 kg and length 4700 mm was built. The pendulum was instrumented with a high-speed camera, angular encoder, optical position-tracking system, and accelerometers. By considering potential energies and the damping in the system, the material toughness was determined to be between 327 and 534 kJ/m2. The maximum impact forces were determined from the deceleration of the pendulum during impact and were between 3565 and 4106 kN. The failure time was determined qualitatively from high-speed imagery to be between 10.18 and 11.58 ms. The dissipated energy is roughly equivalent to the kinetic energy of a 500 kg projectile traveling at 30 km/h.

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