Analysis
of Shear Walls/Panels:
HYST has been implemented
in a general static or dynamic analysis of shearwalls/diaphragms and Panelized
construction. For shearwalls, two levels of complexities have been considered:
one limited to racking deformation as in an earthquake or windstorm, and
another in which the wall may be subjected to simultaneous loading in racking
and transverse loads, with the addition of vertical (axial) loads. The
corresponding computer programs are called WALL and PANEL. The latter can
consider general panelized construction with or without rigid insulation
in the wall cavity.

Shear wall testing configuration
in UBC Civil Engineering's shake table


The figures above (click
to enlarge) show runs of PANEL for push-over tests on two types of shear
walls. In the first, the entire wall is covered with a Jumbo OSB panel.
In the second, the wall has standard size OSB panels with corresponding
gaps.


The figures above (click
to enlarge) show runs of PANEL to compute hysteretic behavior of the same
shear walls.

PANEL can also be used to
predict the time history for the displacement at the top of the shear wall
(drift) when the base is excited by an earthquake. The above figure (click
to enlarge) shows the calculated response of a shear wall when using the
ground motion of the Landers, Joshua Tree Station, California earthquake
of 1992. The maximum drift during the earthquake can be extracted from
the data to construct a response surface for later reliability analysis
or performance base design.
More details on these models
can be found in:
He, Ming, Lam, F. and Foschi,
R.O. 2000. "Numerical analysis of statically loaded three-dimensional timber
light-frame buildings", Proceedings, World Timber Engineering Conference,
Whistler, B.C. Canada, July 31-August 4, 2000.