Research on dynamic characteristics test of wooden floor structure for gymnasium

Abstract

In order to better evaluate the structural performance of the wooden floor used in the gymnasium and realize the structural optimization design, this research considered two gymnasium’s floors in Nanjing as the research object and used the transient excitation method to test the natural frequency and damping ratio parameters of the three types of floor structures. The results showed that three kinds of floor structures all meet the requirements of building comfort; under the premise that the types and specifications of the constituent materials were the same, the order of the damping ratios of the three kinds of floor structures from large to small was: the fixed floor structure with double-layer load distribution strip, the suspended floor structure with single-layer load distribution strip, and the suspended floor structure with double-layer load distribution strip; compared with the fixed floor structure, the suspended floor structure had low damping ratio characteristics, the energy dissipation was slow during structural vibration, which means its impact absorption rate was small, and its impact buffering ability was good. The integral structure had good resilience performance; compared with the floor structure using single-layer load distribution strip. The floor structure using a double-layer load distribution strip had a low damping ratio characteristic. The absorption rate of the structure was small and the resilience performance was good. The research conclusion had certain engineering application value.

A Review on Flexural Properties of Wood-Plastic Composites

“…The physical methods include drying treatment, alkali treatment, and electric treatment, whilst the chemical methods include acylation of lignocellulosic, etherification, graft etc. Wood can be treated to broaden its application scope [ 28 ] in addition to use in building construction [ 29 ]. Wood can be used as a building material for multistorey buildings, where the structural configuration can be optimized for seismic design [ 30 ].…”

Research and Application Progress of Straw

“…Studies have shown that the composition of straw is similar to that of bamboo [61][62][63][64] and wood [65,66]. Therefore, it can be considered as an alternative raw material for wood and bamboo [67][68][69].…”

Design and manufacture of laminated veneer lumber packaging boxes and pallets and evaluation of their mechanical properties

“…where E is the elastic modulus of the specimen (Pa); ρ is the air-dry density of the specimen (kg/m -3 ); f1 is the first-order bending frequency of the specimen (Hz); L is the specimen length (m); and h is the specimen thickness (m) (Wang et al 2014(Wang et al , 2015(Wang et al , 2018Zhou et al 2021). The shear modulus was calculated according to Eq.…”