More Is Less – The Integral Mass Timber Bridge

Author(s):  
Thorsten Helbig ◽  
Jochen Riederer ◽  
Florian Meier ◽  
Christian Rieser

<p>Today, few new bridges are made of timber. Since the industrialization, timber bridges have increasingly lost ground to steel and later concrete bridges. In addition, timber bridges developed a reputation of high maintenance and low durability from many crossings built between the 1970s and 1990s.</p><p>Interest in timber bridges has recently grown due to new motivations in design, including an increased focus on sustainability. Efforts in research and engineering to reexamine timber bridges have led to the development of the “Integral mass-timber bridge”. The bridges will be a first: timber integral bridges without any movement joints or bearings between the superstructure and the concrete abutments.</p><p>These structures were developed taking into account the efficient use of natural resources as well as the carbon-emissions during the entire life span of the bridge: from the design and manufacturing to maintenance and operation. The body of the bridge is made of block-laminated timber beams and articulates the guiding principle of mass timber: the sequestration of carbon within the massive timber construction.</p><p>Currently, the first three of these bridges are being constructed in Germany, with completion in May 2019. The concept has been awarded with the German Timber Construction Award 2017.</p>

2016 ◽  
Vol 1 (1) ◽  
pp. 10
Author(s):  
Che Rusuli ◽  
Fitriani Q ◽  
Syahida N. ◽  
Hakim M.

Nowadays, Go Green has becoming an initiative in protecting the natural resources for the next generation and protects human health through environmental management and implementation of green ways of life. This study seeks to identify the effectiveness of the implementation of Go Green by Majlis Perbandaran Kota Bharu (MPKB) Kelantan. The population of this study includes society in Kelantan and 200 respondents will be involved which is lives in Pengkalan Chepa, Kubang Kerian, Pasir Tumboh, Wakaf Bharu and Kijang. The results from this study hoped will contribute to the body of knowledge which has a positive significant relationship with education, technologies and legal actions.


2020 ◽  
Vol 202 ◽  
pp. 03023
Author(s):  
Andryan Setyadharma ◽  
Shanty Oktavilia ◽  
Yayu Tika Atmadani ◽  
Indah Fajarini Sri Wahyuningrum

Natural resources play as vital inputs for economic activities, mainly in developing countries. However, massive use of natural resources puts more pressure on the environment and as the result, the quality of environment is deteriorating. The body of economic literature have shown that income is associated with harm to the natural environment. The relationship between income and degradation of the environment is known as the Environmental Kuznets Curve (EKC) hypothesis. Previous studies of EKC hypothesis in Indonesia are still limited and the results are inconclusive due to different results. Therefore, the aim of this study is to present a new insight of the existence of EKC in Indonesia using different method. Most of previous studies of EKC in Indonesia employ Autoregressive distributed lag (ARDL) method, while this study uses data panel regression method from 33 provinces in Indonesia during 2012 to 2018. The result confirms the existence of EKC hypothesis in Indonesia. This study also estimates the turning point, a level of income that starts give positive impact on the environment. This result gives new insight to the existing literature. The policy implication for policymakers are straightforward, i.e. improve wealth of the society through higher income for the protection of the environment.


2021 ◽  
Author(s):  
◽  
Gabriella Joyce

<p>In a climate where standard methods of construction are being challenged, developments in engineered timbers are allowing mass timber construction to be explored as a sustainable alternative to traditional building methods. Cross- laminated timber (CLT) is at the forefront of this evolution and, with the advancement in computational design and digital fabrication tools, there lies an opportunity to redefine standard construction. This project explores how digital modelling and advance digital fabrication can be combined to generate a connection system for CLT panels.  The advantages of CLT and mass timber construction are numerous and range from environmental and aesthetic benefits to site safety and cost reduction benefits. There are, however, issues that remain surrounding the connections between CLT panels. Steurer (2006, p.136) stated that, “Progress in engineered timber construction is directly related to developments in connector technology.” This thesis creates connections inspired by traditional Japanese joinery that have been adapted to be used for the panel construction of CLT structures. Using CLT offcuts as a primary connection material, the system not only reduces waste but also mitigates thermal bridging and lowers the number of connection points whilst increasing the ease of building and fabrication.  The connections are first considered at a detail scale. They use the literature review and case studies as a base for design before being tested using digitally fabricated prototypes. These prototypes are evaluated against a framework created in line with the aforementioned criteria. Within this framework, the connections are analysed against existing connection systems as well as previous designs to establish a successful system. The connections are then evaluated within the context of a building scale and considers large-scale fabrication and on- site assembly whilst continuing to focus on the reduction of waste. This research found that the simplicity of the connections is key to a successful system as this allows for faster and cheaper fabrication and installation. However, there is still further research needed surrounding large-scale fabrication and the structural capacity of timber connection systems.</p>


2013 ◽  
Vol 312 ◽  
pp. 382-386
Author(s):  
Lei Lei Qi

Although the research on the safety of the nanomaterials has made some progress, there are still some problems, such as: lacking the knowledge of the entire life cycle of nanomaterials----the production, the application and the transformation; more research on the safety of the nanomaterials which enter the body through inhalation, but less on other approaches; the lack of ideal reference materials; a shortage of appropriate toxicological endpoints in vitro experiments and standards to determine the dose. This paper mainly analyzes the security and evaluation of nanomaterials.


Buildings ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 183 ◽  
Author(s):  
Annie Gosselin ◽  
Pierre Blanchet ◽  
Nadia Lehoux ◽  
Yan Cimon

Timber structures in construction have become more popular in recent years. Nevertheless, besides the complexity of designing, contracting and building these structures, a barrier to their market growth is the complexity of their supply chain relationships encompassing architects, engineers, builders and suppliers. The objective of this study is therefore to identify and characterize the supply chain relationships shared by these stakeholders within a massive timber construction project. Twenty-seven semi-structured interviews with architects, structural engineers, builders and timber element suppliers from nine countries, participant observations and secondary data were used to study the various relationship levels involved in timber construction projects. Triangulation and qualitative data analysis were also conducted. Three levels of relationships were then identified: “Contractual,” “Massive timber construction project” and “Massive timber construction industry development.” Results showed that timber structures involve value-added stakeholder relationships rather than linear relationships. These relationships appeared closer and more frequent and involved knowledge and information sharing. Furthermore, prefabricated systems allow for smoother relationships by limiting the number of stakeholders while promoting innovative thinking.


elni Review ◽  
2012 ◽  
pp. 83-91
Author(s):  
Julian Schenten ◽  
Martin Führ

According to Art. 3(3) of the Treaty on the European Union, the Community is working towards the sustainable development of Europe – this constitutes the overriding long-term goal of the European Union. The guiding principle of sustainable development aspires towards the reduced exploitation of natural resources aimed at their long-term preservation and a reduced pollutant burden for protected natural resources. The target for 2020 is that "chemicals are used and produced in ways that lead to the minimization of significant adverse effects on human health and the environment" (’Johannesburg goals’). In addition, the guiding principle pursues the safeguarding of the basis for survival and economic production in order to maintain an adequate quality of life. These aims can only be achieved by far-reaching changes to the economic and social structures and also to patterns of consumption and production – consequently innovations are required. This requires specific regulatory strategies – particularly for product or process innovations – in order to create adequate incentives so that actors from trade and industry get innovations for sustainability off the ground. In connection with this the question arises as to how nanomaterials are to be regulated so that the innovation processes linked to these substances are aligned with the guiding principle of sustainable development. Nanomaterials are substances in terms of the REACH Regulation and therefore fall within its scope. However, REACH does not contain any provisions directed specifically at nanomaterials. The regulatory omissions arising from this – no definition for nanomaterials; tonnage quantity thresholds may be inappropriate for nanoscale substances; transitional periods for existing substances (phase-in substances, Art. 23) also apply to certain nanomaterials; test procedures are not designed to nanomaterial specifications, etc. – are discussed in depth in the literature. This article takes a different perspective. It examines to what degree REACH promotes innovations for sustainability through nanomaterials. The question of how the regulation affects the manufacturers' approach to nanomaterials was the subject of a survey sent to companies which manufacture and/or use nanomaterials. The survey questioned 37 companies based in Germany. Besides the issues of registering for REACH and carrying out safety assessments, the main focus of interest was on the relationships between substance risks and innovation and between REACH and innovation. The findings obtained from the survey were augmented by telephone interviews on this subject and by the results of a workshop held in Darmstadt, Germany, in December 2011 with representatives from companies and industry associations and experts on the regulation of nanomaterials. Finally, this contribution refers to the results of a study carried out for the European Commission on the innovative effects of REACH on emerging technologies. This document summarises the most important results from the empirical data and, where the data permits, draws some preliminary conclusions for a possible adaptation of the legal framework for nanomaterials.


2020 ◽  
Vol 61 ◽  
pp. 102154
Author(s):  
Adam Scouse ◽  
Stephen S. Kelley ◽  
Shaobo Liang ◽  
Richard Bergman

Sign in / Sign up

Export Citation Format

Share Document