Research Trends and Results

Consideration regarding seismic performance of panel
structure by Cross Laminated Timber
Tsuchimoto Takahiro (Dr. agriculture), HeadEvaluation System Division, Research Center for Land and Construction Management(Keywords) Wooden building, Public architecture, Cedar, Domestic timber, Region
1. Introduction(picture 2 4 m×8 m×9.5 m) was assumed as a 5 story

As a general rule, it is constructed by woodenbuilding and put weights on the top of structure of the thirdconstruction regarding low rise architectural structure due tostory, and the weights were about 400 kN that correspondthe Act for Promotion of Use of Wood in Public Buildings.

to fixed load of 2 story. In response to that, using large scale

However structure method of large scale wooden

earthquake resistant experiment facility of Nationalarchitectural structure is needed to be generalized to makeResearch Institute for Earth Science and Disaster Prevention,

public building wooden. As a structure method to do large

artificial seismic wave that corresponds to earthquake thatscale wooden architectural structure possible, there is ararely and / or very rarely occurs which is required by thebox-frameof

Building Standards Act and observed wave from the（ Cross-Laminated-Timber ：South-Hyogo Earthquake in 1995 (JMA Kobe) wereconstruction

Cross-Laminated-TimberusingpanelCLT）, and it is required to be generalized from home andentered in long axis direction.

abroad. CLT construction method uses thick panel oflamina that is orthogonalized and done lamination glueing(Picture 1). The structure method comes from Europe.
Therefore the consideration regarding earthquake protection
securement has just begun.
This experiment is implemented as a first step for a finalpurpose that is a formulation of earthquake-resistant design
measure of the CLT structure method.
Picture 2 Appearance of specimen
3. Experimental result
Picture 1 Cross Laminated Timber (CLT) PanelAs a result of the shaking test, the maximum interlaminar
deformation was developed at the second story (picture 1),

2. Specimen and experimental method

but for the artificial seismic wave that corresponds to

CLT panel that is originated and produced in Europe, it isearthquake that very rarely occurs which is required by acts

possible to produce width about up to 3 m and length about

related to the Building Standards Act, it was about 1/166

up to 20 m, and its aperture is normally formed by cuttingrad, and for the JMA Kobe, it was about 1/61 rad, and thefrom rectangle panel. But this time, 1 m wide panel wasboth went no further than that. It is corresponded to quite

used as wall panel, cross member panel and floor panel, andsmall deformation than the result of numerical analysis thata structure method that constructs the building frame by

was done previously based on the result of shear test of joint

jointing each panel with bolts was adopted. The specimenpart 1) and horizontal shear test of plane frame elements 2).

Research Trends and Results
Because there was no big damage observed for both of them,and damage boundaryof CLT panel structure of thisstructure method was taken as damage boundary
deformation of wooden building 1/120 rad, and it indicateda good possibility.

Chart1 Load deformation relationshipThe details of the experimental result should be referred
to literature 3). This research was implemented as part of acollaborative research by three that were NILIM, NIED
(National Research Institute for Earth Science and Disaster
Prevention) and Nihon System Sekkei, Inc.

(Sources)
1) SUZUKI Kei, GOTO Takahiro and other: Strength testof CLT Joint, WOOD STRUCTURE PROM INC. ,Unpublished information.

2)TSUCHIMOTO Takahiro, TSUDA Chihiro and other 4people: The 62nd The Japan Wood Research Society
Research Publication Synopsis, CD, 2012

3)TSUCHIMOTO

Takahiro,

KAWAINaoto,

YASUMURA Motoi and other: The Architectural Instituteof Japan Academic Lecture Synopsis, C-1, 305-326, 2012.