Timber beam seismic design – A numerical simulation

Abstract

In order to design a seismic timber beam, the effect of near-fault ground motion on timber beam has numerically been investigated, with reference to small displacement theory. The simulated near-fault ground motion is applied on the fixed base of a timber frame model. The beam is placed in single span of a timber frame. The beam has two different length sizes of 1.8 and 3.3 meters. The seismic load-displacement, seismic load-strain and strain-displacement have been calculated for all models and shown in graphs. The beam is designed with nonlinear analysis method and some mechanical properties for all models have been used, in numerical analysis. The numerical analysis results indicate that, the inertial interaction, energy dissipation and nonlinear deformation of beams in timber frames have directly related with frame span. In beams with a smaller length, higher seismic loading caused lower displacement. The displacement is reduced by reducing the length of the beam. The inertial interaction, energy dissipation and nonlinear deformation are changed respect to the length of the beam. The innovation of this paper is to develop cycling graphs by using ABAQUS, to improve design of timber frame and give an adequate explanation of seismic behavior of timber beam.

The effect of nonlinearity of acceleration histories to timber beam seismic response

“…The investigation was to understand the timber frame seismic response as the timber frame is subjected to near‐fault ground motion. In the numerical analysis, the ABAQUS software was used for the seismic design of a timber frame shown in Figure . Figure A shows near‐fault ground motion is applied to the single‐span timber frame.…”

“…In the numerical analysis, the ABAQUS software was used for the seismic design of a timber frame shown in Figure 1. 1 Figure 2A shows near-fault ground motion is applied to the single-span timber frame. Figure 2B shows near-fault ground motion zoomed from 22 to 26 seconds.…”

“…The stress, strain, displacement, strength, fatigue, stiffness, geometry, crack paths, two cross-section interaction, uniaxial loading, multiaxial loading, material characteristics, and embedded footings that have been investigated and reported in the literature are directly and indirectly related to strain energy dissipation and damping of the material, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] all of these concepts are required to apply on strain displacement of timber structure to enhance seismic design.…”

“…In the present study, the beam has two different sizes, 1.8 and 3.3 m in length, and both beams have 0.3 × 0.3 m cross-section. 1 The seismic strain-displacement curves have been discussed and interpreted to understand the effect of acceleration histories' nonlinearity to timber beam seismic response in strain energy dissipation and damping of the material. The influence of acceleration histories' nature to the timber frame seismic response has not been reported in the literature adequately.…”

The Timber Floor Seismic Design by Means Finite Element Method

“…There is a report on the improvement of the seismic resistance of historical industrial timber buildings [4]. Several research were reported on timber beam and column to study displacement, strain energy and seismic load sharing [5][6][7].…”