Conference paper Open Access
FLEXIBLE POLYMER CONNECTIONS FOR CLT STRUCTURES
Boris Azinović; Andreja Pondelak; Jaka Gašper Pečnik; Vaclav Sebera
This paper explores the possibility of using flexible polymer adhesives to dissipate energy in CLT buildings
during earthquakes. In the first series of tests, pull-off tests of various polyurethane (PUR) adhesives were performed.
The connection was tested in pull-pull configuration using monotonic, tension-only loading. The tests have shown that the
adhesive can resist large deformations already in tension loading and with small thicknesses of the bond-line. Based on
the pull-off test results, one adhesive has been selected for further testing. Monotonic lap-shear tests were performed with
the selected adhesive and thick bond-line (3 mm and 6 mm). The results show, that the standard method for lap-shear
testing (EN 205) needs to be adapted for thick glue-line. It was found that the strength of 3 mm glue-line is higher than 6
mm one, which is in agreement with adhesion theory. The flexible PUR adhesives could potentially be used in CLT
structures for anchoring the CLT wall with “flexible” glued-in rods or as a “flexible” vertical shear connection between the
CLT walls. Such systems have a potential to dissipate energy in seismic areas.
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- Publication date:
- April 21, 2021
- DOI:
-
- Keyword(s):
- CLT connections flexible adhesive polyurethane energy dissipation pull-off lap-shear
- Grants:
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European Commission:
- InnoRenew CoE - Renewable materials and healthy environments research and innovation centre of excellence (739574)
- Meeting:
- 2nd International Conference on Construction Materials for a Sustainable Future (CoMS 2020/21), 20-21 April 2021
- Alternate identifiers:
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- 978-961-94071-8-9 (ISBN)
- Communities:
- License (for files):
- Creative Commons Attribution 4.0 International