The shear moduli evaluation of cross laminated timber using torsion test

Wei Chong Liao, Chao Feng Lee, Yen Kuei Chang, Yang Ting Shen

Research output: Contribution to conferencePaperpeer-review


Cross laminated timber (CLT) has gained popularity in Europe and North America due to its versatile applications as structural walls, girders and slabs. Its economic competitiveness, high carbon absorption and sustainability make it as an excellent building candidate. The CLT panel is made of alternately orthogonal glued layers. When subjected to out-of-plane loading, the panel is prone to fail due to its weakest rolling shear capacity. Therefore, it is necessary to characterize its rolling shear capacity before a full adoption of this material. Coniferous planks made of yellow pine, and Taiwan planted Japan cedar are cut along their tangential, radial and cross sectional planes to produce the testing pieces. Structural size timber bars of yellow pine and Japan cedar with lengths of 30 cm long, respectively, are mounted on a torsion machine to measure their shear moduli. Strain gages, extensometers and inclinometers are mounted on the surface of the bar to record the shear strains and twisting angle during torsion test. A novel design of mounted strain gages and extensometers allows the simultaneous measurement of shear moduli GLR and GLT using one specimen which can reduce the amount of test coupons and material property variations. The setup of detachable clip on extensometers can further save the adhering time of strain gages.

Original languageEnglish
Publication statusPublished - 2018
Event2018 World Conference on Timber Engineering, WCTE 2018 - Seoul, Korea, Republic of
Duration: 2018 Aug 202018 Aug 23


Other2018 World Conference on Timber Engineering, WCTE 2018
Country/TerritoryKorea, Republic of

All Science Journal Classification (ASJC) codes

  • Forestry
  • Plant Science


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