Further Research

It turns out that the formation of tree bark mimics that of human skin! New bark layers are formed underneath the outer bark with the outer bark layer actually being decaying/old protective tree skin that has hardened. The formation of new bark is continuous and therefore the actual tree bark pattern/system is also constantly changing.

http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/trees-new/text/tree_anatomy.html

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I found this rather interesting image of tree bark when researching different types of trees:

http://www.allposters.com.au/-sp/A-Close-View-of-White-Birch-Bark-posters_i3568637_.htm

Unlike 'traditional' treebark with is jagged vertical edges, this kind of bark (from a white birch tree)  is remarkably smoother and has small uncomplicated horizontal lines running across the entire surface. Just goes to show how diverse and contrasting something as simple as bark can be.

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I found another skeletal kind of structure similar to what I have in mind for the design:

http://www.architypereview.com/17-train-stations/projects/465-randstadrail-station-beatrixlaan

This kind of design is what I had in mind for my own, except in this design everything is organised and neat (unlike jagged random treebark). The cylindrical profile and the slight curves/bends of the cylindrical profile in this architecture (along the longitudinal axis) is what I'm more interested for a physical form for my model.