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Experimental evaluation of the ulag glulam beam simulation program

University of British Columbia

An experimental study on the bending capacity of glued-laminated beams was undertaken to facilitate the verification of the stochastic finite element beam simulation program ULAG (Ultimate Load Analysis of Glulam). For the material data base, 600 tension and stiffness tests were done on two different grades of machine stress rated laminating stock, consisting of 2x6 (38mm x 140mm) spruce and pine lumber. Thirty 16-foot (4.88m) glulam beams of eight 2x6 laminations each and thirty 24-foot (7.31m) glulam beams of twelve 2x6 laminations each were made in a commercial glulam plant and tested in bending to failure on a 200 kip universal testing machine. The mean modulus of elasticity values and ultimate bending loads were compared with analytical predictions. The laminating stock test specimens of 100 16-foot (4.88m) 'B' 100 16-foot 'C' 100 8-foot (2.44m) 'B', 100 8-foot 'C' 100 8-foot (2.44m) finger jointed 'B' and 100 8-foot finger jointed 'C' 2x6 (38mm x 140mm) lumber were E-rated using a Cook Bolinders AGAF machine, and tested in tension parallel to grain to failure on a Metriguard tension testing machine. After verification with the physical test data, ULAG was used to investigate various glulam beam properties such as size effect and the effect of different beam lay-ups.

Thesis/Dissertation

application/pdf

2009-03-12

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http://hdl.handle.net/2429/5990

Forestry

University of British Columbia

UBCV

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