| The in-depth contents |
| Publication year |
1996 |
| PDF |
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| Title |
Stress and Deformation Analysis of Membrane Structures Considering Material Nonlinearities - Comparison of Fabric Lattice Model with Orthotropic Elastic Model - |
| Author |
Shiro Kato,Tatsuya Yoshino
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| Summary |
Numerical analyses are performed to a HP membrane fabric roof with initial stresses under Loading and unloading of snow. Two constitutive equations are adopted in the analyses to make a comparison among the analytical results through them: one is based on an ordinary orthotropic elastic model; another one is a fabric lattice model considering material nonlinearities and crimp interchanges.
Numerical analyses were done by eight-node FEM for curved membranes considering initial stresses and geometrical nonlinearities. The result reveals that the stresses under snow load obtained from both methods are relatively compatible. HoweverEŒthe differences of stresses after unloading appeared so large in case of low initial stresses. This is because only geometrical nonlinearities can be considered in using the orthotropic elastic modelEŒwhile neither the material plasticities nor crimp interchanges can.
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