Experimental Investigation of Structural Behavior for Cross Laminated Timber (CLT) Wall-to-Floor Connection

Volume: 19 Issue: 1
Year: 2024

Current Issue Published Issues Most Accessed Articles Ahead of Print

Index and Coverage

Avery Index

DOAJ

EBSCO

Erih Plus

ESCI � Clarivate

GALE Cengage

Genamics

ProQuest

TR Dizin

TUBITAK Ulakbim

Ulrichs Web

Experimental Investigation of Structural Behavior for Cross Laminated Timber (CLT) Wall-to-Floor Connection [Megaron]

Megaron. 2019; 14(4): 521-529 | DOI: 10.14744/megaron.2019.75508

Experimental Investigation of Structural Behavior for Cross Laminated Timber (CLT) Wall-to-Floor Connection

Ayg�l Ceylan, Z Canan Girgin
Yild�z Technical University Department of Architecture, �stanbul, Turkey

Cross-Laminated Timber (CLT) is an innovative industrial wood product, especially as a structural wall in order to meet the rigidity and strength requirements in multi-storey timber buildings. CLT members are assembled with metal connectors (angle bracket, joining plates, etc.) via nails, screws, dowels, etc. For energy-absorbing structural CLT connections, many experimental studies have been conducted on the effectiveness of the connections, especially for the earthquake prone regions. There is no scientific study in this context in Turkey yet. For this purpose; the performance of a full-scale CLT wall-to-floor specimen assembled with metal connection was experimentally investigated under axial tensile force due to bending moments of seismic loads. Domestic angle bracket, plates, and phosphate coated annular ring nails were used. All the displacements and strains were measured and collected during the test of the specimen, behavior of connection and the failure mode was observed. As a result, the back side deformation of CLT wall member was prevented with the plates for a longer period compared with no-plate case and the withdrawal resistance of from CLT floor increased through phosphate coated annular ring nails and extra three nails in the corner of angle bracket on the front side. Domestic metal connectors were used in the experiments to support the metal industry and the production with low cost. This study is a pioneering study in Turkiye on the experimental performance of CLT connections for the structural utilization. The results are promising, and the further experimental researches will continue for the most effective connection type.

Keywords: CLT wall-to-floor connection, CLT shear wall; cross laminated timber; earthquake resistant building design; phosphate coated annular ring nail; structural behavior.

�apraz Lamine Ah�ap (CLT) Duvar�D��eme Birle�iminin Yap�sal Davran��n�n Deneysel �ncelenmesi

Ayg�l Ceylan, Z Canan Girgin
Y�ld�z Teknik �niversitesi Mimarl�k Fak�ltesi, Yap� Bilgisi Anabilim Dal�, �stanbul

�apraz Lamine Ah�ap (Cross-Laminated Timber, CLT); ah�ap �ok katl� yap� �retiminde, �zellikle ta��y�c� duvar olarak kullan�m�na y�nelik rijitlik gereksinimini kar��lamak amac�yla geli�tirilmi� end�striyel ah�ap bir �r�nd�r. CLT yap� elemanlar�, metal par�alar (k��ebent, birle�im levhalar� vb.) kullan�larak �ivi, vida, kama vb. ile birle�tirilir. Enerji yutabilen yap�sal CLT birle�imlerinin geli�tirilebilmesi amac� ile birle�imlerin, �zellikle deprem riski y�ksek alanlardaki etkinli�i �zerine bir�ok deneysel �al��ma yap�lmas�na kar��n; T�rkiye�de bu kapsamda bilimsel bir �al��man�n hen�z yap�lmam�� oldu�u g�r�lm��t�r. Bu ama�la �al��mada; metal birle�im par�alar� kullan�larak biraraya getirilen, ger�ek boyutlu CLT duvar-d��eme �rne�inin, sismik y�klerin e�ilme momentlerinden dolay� eksenel �ekme kuvveti alt�ndaki etkinli�i, laboratuvar ortam�nda deneysel olarak incelenmi�tir. Metal k��ebent, birle�im levhalar� ve fosfat kaplamal� halkal� �iviler yerli �retim yapan firmalardan sa�lanm��t�r. Deney s�resince, yerle�tirilen �l��m cihazlar� ile yerde�i�tirme ve �ekilde�i�tirmeler kay�t alt�na al�narak; birle�imin davran�� ve g��me modu incelenmi�tir. Sonu� olarak, birle�imin arka y�z�nde kullan�lan levhalar ile �n y�zde bulunan rijitle�tirilmi� metal k��ebentin k��e b�lgesine eklenen fosfat kaplamal� halkal� �ivilerin, d��eme eleman�ndaki �ivilerin tutunma yetene�ini artt�rarak s�yr�lmas�n� ve g��me hasarlar�n�n olu�mas�n� geciktirdi�i g�r�lm��t�r. Deney �rne�inin arkas�ndaki d��eme eleman�n� olu�turan tabakada lif k�r�lmas�, k��ebent, levhalar ve birle�imi sa�layan �ivi ba�lar�nda olu�an d�zensiz �ekil de�i�iklikleri gibi �nemli hasar t�rleri ve g��me modlar� ile kar��la��lm��t�r. Deneylerde, metal end�strisini ve d��k maliyetli �retimi desteklemek amac�yla yerli �retim metal birle�im par�alar� kullan�lm��t�r. Bu �al��ma, T�rkiye�de yap�sal kullan�ma y�nelik CLT birle�im davran��n� inceleyen ilk ve �nc� deneysel ara�t�rma olma �zelli�ini ta��maktad�r. Ara�t�rman�n sonu�lar�, etkin birle�im t�rleri konusunda ileride yap�lmas� planlanan �al��malar i�in de yol g�sterici olacakt�r.

Anahtar Kelimeler: CLT duvar-d��eme birle�imi, CLT ta��y�c� duvar; �apraz lamine ah�ap; depreme dayan�kl� yap� tasar�m�; fosfat kaplamal� halkal� �ivi; yap�sal davran��.

Ayg�l Ceylan, Z Canan Girgin. Experimental Investigation of Structural Behavior for Cross Laminated Timber (CLT) Wall-to-Floor Connection. Megaron. 2019; 14(4): 521-529

Corresponding Author: Ayg�l Ceylan, T�rkiye

TOOLS