A structural analysis method for the long-term response
of wooden structures is presented in this publication.
The utilization of this analysis tool requires the
following three components:
- an effective computer (Cray X-MP);
- a finite element (FE-) program for non-linear analysis
of structures (ABAQUS);
- the implementation scheme of the stress-strain relation
for wood into the FE-program (subroutine UMAT).
The third component was developed at The Technical
Research Centre of Finland (VTT) and is introduced here.
The mechanical properties of timber in its
cross-sectional plane were considered homogeneous and
cylindrically orthotropic, i.e. the local effects of the
annual rings were ignored. The response of wood to
mechanical loading and moisture changes was modelled
using three strain terms: linear elastic strain, free
moisture expansion and mechano-sorptive creep, which
takes the combined effect of moissure change and
mechanical loading into account. Viscoelastic creep
accommodated with pure mechanical loading was ignored.
The use of ABAQUS for detailed stress analysis of wood is
demonstrated with examples.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||54|
|Publication status||Published - 1991|
|MoE publication type||Not Eligible|
|Series||Valtion teknillinen tutkimuskeskus. Tiedotteita|
- finite element analysis
- computer programs
- mathematical models
- structural analysis
- structural timber
- wooden structures
- timber construction
- mechanical properties
- loads (forces)
- stress analysis