Study on vibration performance and comfort of glulam beam and deck floor

Abstract

Abstract This paper presents the dynamic characteristics of the glued-laminated-timber (glulam) floor in China's tallest wooden office building and establishes a Finite Element (FE) model. The FE model's applicability is verified through experiments. The study investigates the effect of Reinforced Ribbed Wood Beams (RRTB) on floor vibration characteristics and evaluates the comfort index. Ambient Vibration Test (AVT) and human walking tests was carried out on the specific floor. The results show that the RRTB significantly increase the overall stiffness of the floor, and change the natural frequency and modal vibration shape of the floor. The thickness of the RRTB has a more significant effect on the dynamic characteristics of the floor compared to its width. The static deflection of the floor is the most sensitive to the size change of the reinforced ribs, compared to the fundamental frequency and maximum displacement. For high-rise glulam building floors, AVT can be effectively applied to fundamental frequency testing; Even if the fundamental frequency of the floor meets the comfort index, acceleration and velocity amplitude tests are still necessary.