PSI - Issue 37

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 il l li t . i ir t. i i tructural Integrity rocedia 00 (2019) 000 – 000

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Procedia Structural Integrity 37 (2022) 417–424

ICSI 2021 The 4th International Conference on Structural Integrity Influence of the connector shape parameters in the structural behaviour of the adhesive- free timber floor panels Gonzalo Moltini a,b *, Vanesa Baño a,b t I t r ti l f r tr t r l I t rit l lti i a, , a, I I

a Fundación Cesefor, Polígono Industrial Las Casas, Calle C, Parcela 4, 42005, Soria, Spain b Instituto de Estructuras y Transporte, Fac. Ingeniería, Universidad de la República, Uruguay a undación esefor, olígono Industrial as asas, alle , arcela 4, 42005, Soria, Spain b Instituto de structuras y ransporte, ac. Ingeniería, niversidad de la epública, ruguay

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Abstract Timber-to-timber panels (TTPs) are adhesive- and steel-free structural components formed by carpentry joints of Scots pine to be used as floors. Figure 1 shows a schematic on the TTPs and a detail on the connectors. A numerical model simulating bending tests on TTPs and considering timber as an orthotropic and bi-modulus material was validated from experimental results of deflection, and rolling shear strength. Since the serviceability and ultimate limit states of the TTPs was mainly defined by the rolling shear properties of the connectors, this paper aims to study the influence of different connector shape parameters in the structural behavior of the panels. For that, values of the connector height (hc varying between 40 and 100 mm), width (b 1 varying between 40 and 100 mm) and the dove-tail angle ( varying between 45º and 75º) were introduced in the numerical models to obtain both failure load and stiffness for different span TTPs. Results showed that TTP deflection and shear stresses on the connectors decreases with the increase of the height and the width of the connectors. As the width of the connector ( b 1 ) increases, the maximum shear stress decreases up to 42%. For a same connector height, the angle of the dove-tail shows low influence in the maximum shear stress; however, it plays a greater role in the deflection of the panels. For the connectors of 40 mm of height TTP deflection was barely influenced by connector width; however, for higher connectors ( h c ≥ 60 mm ), TTP deflection decreased up to 41% as width increases. So, new TTPs configurations varying the connector parameters showed an improvement on the deflection and on the shear stresses of the connectors. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira Keywords: Adhesive-free, Structural yield, Timber-to-timber panels str ct i er-t -ti er a els ( s) are a esi e- a steel-free str ct ral c e ts f r e car e tr j i ts f c ts i e t e se as fl rs. i re s s a sc e atic t e s a a etail t e c ect rs. erical el si lati e i tests s a c si eri ti er as a rt tr ic a i- l s aterial as ali ate fr e eri e tal res lts f eflecti , a r lli s ear stre t . i ce t e ser icea ilit a lti ate li it states f t e s as ai l efi e t e r lli s ear r erties f t e c ect rs, t is a er ai s t st t e i fl e ce f iffere t c ect r s a e ara eters i t e str ct ral e a i r f t e a els. r t at, al es f t e c ect r ei t ( c ar i et ee a ), i t ( 1 ar i et ee a ) a t e e-tail a le ( ar i et ee º a º) ere i tr ce i t e erical els t tai t fail re l a a stiff ess f r iffere t s a s. es lts s e t at eflecti a s ear stresses t e c ect rs ecreases it t e i crease f t e ei t a t e i t f t e c ect rs. s t e i t f t e c ect r ( 1 ) i creases, t e a i s ear stress ecreases t . r a sa e c ect r ei t, t e a le f t e e-tail s s l i fl e ce i t e a i s ear stress; e er, it la s a reater r le i t e eflecti f t e a els. r t e c ect rs f f ei t eflecti as arel i fl e ce c ect r i t ; e er, f r i er c ect rs ( c ), eflecti ecrease t as i t i creases. , e s c fi rati s ar i t e c ect r ara eters s e a i r e e t t e eflecti a t e s ear stresses f t e c ect rs. e t rs. lished I . . This is an open access article er t e - - license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires reira ey ords: dhesive-free, tructural yield, i ber-to-ti ber panels

* Corresponding author. Tel.: +34-975 21 24 53 E-mail address: gonzalo.moltini@cesefor.com * orresponding author. el.: 34-975 21 24 53 - ail address: gonzalo. oltini cesefor.co

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 2452-3216 2022 he uthors. ublished by I . . his is an open access article under the - - license (https://creativeco ons.org/licenses/by-nc-nd/4.0) eer-revie under responsibility of edro iguel ui araes ires oreira

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.104