Low carbon construction systems using prefabricated engineered solid wood panels for urban infill to significantly reduce greenhouse gas emissions

Published Date
February 2013, Vol.6:57–67, doi:10.1016/j.scs.2012.08.004

Author 

• Steffen Lehmann ^,

• sd+b Research Centre, University of South Australia, GPO Box 2471, Adelaide SA5001, Australia

Available online 1 September 2012.

Abstract

Low-carbon prefabricated modular construction systems, using prefabricated engineered solid wood panel construction systems, such as load-bearing cross-laminated timber panels, and ‘design for disassembly’ principles will offer significant opportunities for greenhouse gas emission reduction and waste avoidance, among other benefits. However, introducing such innovative and sustainable construction systems to the Australian construction industries and housing markets has its challenges.

This paper explores the opportunities offered by an innovative low carbon construction system using cross-laminated timber (CLT, also known as cross-lam) panels to improve the design and delivery of urban infill housing of the Australian construction market. CLT construction has been developed around 1996 in Europe, mainly in Austria and Germany: thick layers of timber boards are glued crosswise in different directions to increase loadbearing capacity. This article describes a multi-disciplinary research project into engineered timber panels which aims to transform the Australian construction and development industry, involving a range of key partners. This project aims to introduce CLT panels as a way to build with a lightweight prefabricated low-carbon construction system that is advantageous for urban infill and residential buildings in the range of 4–10 stories height. The challenges, research questions and advantages of this new engineered timber system are explained, and a research methodology for further research is presented.

Highlights

► Low-carbon prefabricated modular construction systems are introduced. ► Engineered cross-laminated timber (CLT) panels for inner-city 4–7 storey housing. ► Carbon reduction and waste avoidance are goals of such innovative systems. ► More mid-rise urban infill housing will densify the city centre.

Keywords

Multi-storey infill housing

Low carbon construction

Solid wood panel systems

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Design Methods of Elements from Cross-laminated Timber Subjected to Flexure

Published Date
2015, Vol.117:10–19, doi:10.1016/j.proeng.2015.08.117
International Scientific Conference Urban Civil Engineering and Municipal Facilities (SPbUCEMF-2015)
Open Access, Creative Commons license

Author 

• Aivars Vilguts
 
• Dmitrijs Serdjuks ^,
 
• Leonids Pakrastins

• Riga Technical University, Azenes Str.16, Riga, LV 1048, Latvia

Available online 3 September 2015. 

Abstract 

Design methods of cross-laminated timber elements subjected to bending is considered. The methods are based on LVS EN 1995–1–1. The presented methods were checked by the experiment and analytically. Two cross-laminated timber plates with the total thickness of 95 mm were tested under action of static load. The considered cross-laminated timber plates were analysed by FEM method, which is based on the using of computational program ANSYSv14. The comparison of stresses acting in the edge fibres of the plate and the maximum vertical displacements shows that the considered methods can be used for engineering calculations so as the difference between the experimentally and analytically obtained results does not exceed 20%.

Keywords

Load-bearing elements

cross-laminated timber plate

static loading

normal stresses

maximum vertical displacement ned element

hybrid composite suspender

long span steel structure

static loading

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References

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• ☆
  Peer-review under responsibility of the organizing committee of SPbUCEMF-2015.

• ⁎ 
  Corresponding author. Tel.: +371 26353082; fax: +371 67089701.

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Analysis of cross-laminated timber by computational homogenisation and experimental validation

Published Date
March 2015, Vol.121:386–394, doi:10.1016/j.compstruct.2014.11.042

Author 

E.I. Saavedra Flores ^a,,

I. Dayyani ^b

R.M. Ajaj ^c

R. Castro-Triguero ^d

F.A. DiazDelaO ^e

R. Das ^f

P. González Soto ^a

aDepartamento de Ingeniería en Obras Civiles, Universidad de Santiago de Chile, Av. Ecuador 3659, Estación Central, Santiago, Chile

bCollege of Engineering, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom

cAeronautics and Astronautics, University of Southampton, Southampton SO171BJ, United Kingdom

dDepartment of Mechanics, University of Cordoba, Campus de Rabanales, Cordoba CP 14071, Spain

eInstitute for Risk and Uncertainty, School of Engineering, University of Liverpool, Brownlow Hill, Liverpool L69 3GH, United Kingdom

fDepartment of Mechanical Engineering, University of Auckland, Auckland 1010, New Zealand

Available online 22 November 2014.

Abstract

In this paper we investigate the mechanical behaviour of cross-laminated timber panels by a computational homogenisation approach. A finite element procedure is adopted within a multi-scale modelling framework to determine the constitutive response of timber. As some of the microstructural parameters of wood are either not well-known or susceptible to considerable variation, we introduce uncertainty in the definition of the material. In order to validate the present multi-scale model, we measure experimentally the longitudinal Young’s modulus and density of sawn wood beams made of radiata pine. In addition, we carry out several experimental tests on cross-laminated timber panels subject to bending, shear and compression loads. Our numerical predictions are compared with the experiments and are validated successfully, revealing the potential predictive capabilities of the present multi-scale modelling for the analysis of wood materials and timber structures.

Keywords

Cross-laminated timber

Homogenisation

Multi-scale modelling

Finite element method

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