Abstract
To improve accuracy results of numerical analysis, the finite element method software needs to use appropriately with considering accurate input data. Among several factors in realistic and economical seismic structural design, the damping ratio needs to be investigated as a calculated and input data in numerical analysis. In the present study, the effect of accurate damping ratio on timber floor seismic design has numerically been examined. The 6 first modes from a series of eigenvalues were selected to calculate natural frequency and damping ratio. The seismic results with and without applied calculated damping ratio were compared. The strain, displacement, and seismic load response are interpreted. The numerical analysis results were showed that the higher nonlinear displacement occurs in timber floor when the damping ratio was modified in numerical modeling. It was found that the floor seismic design is more critical compared to a column in select accurate damping ratio. The damping ratio has highly effect on timber floor seismic design.
Highlights
The floor of a structure is the critical part in seismic design
The numerical analysis results show that the strain energy paths changes with alter damping ratio and lead to modify the inertial interaction and strain energy dissipation, release strain energy governs the nonlinear deformation of timber floor response and it results in develops vertical displacements
The damping ratio was calculated by means complex frequency method, and it applied in finite element method
Summary
The floor of a structure is the critical part in seismic design. The floor plays an important role in load transferring and controlling seismic strain energy during developing displacement and nonlinear deformation. The floor of timber building have been investigated and the enhancement of seismic resistance of timber structure was studied [1,2,3]. In the present study, based on elasticity method is applied in numerical analysis, it aims to enhance the timber structure seismic design with realize strain energy concept. In respect to available literature report it is essential to apply the concept of strain energy in timber floor seismic design with attention to seismic response of timber frame in apply elasticity concept in numerical simulation, this process requires to perform with consider model geometry and the mechanical properties of materials. The collaboration between damping ratio and strain energy at the floor of timber structure has not been reported in the literature by means finite element software ABAQUS, and significant research works related to timber beam are required more research extension. The results of numerical analysis have been compared with the literature report
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