CO2 Fixation Using a Composite Steel Timber Structure

One approach to promote forest growth is the pruning and thinning of trees. In the field of building structure, it is necessary to use thinned woods as timber positively. However, timber is too weak to apply to the large-scale buildings. Research and development of a building system to use timber are demanded. Authors propose composite steel-timber structure aiming to spread wood to building construction field considering the global environment. First, distribution volumes of planted forest of each age forest class in Japan and its CO2 fixation are shown, investigating forest resources. Finally, the specific example of a composite steel-timber structure is shown and CO2 fixation at building structure model using a composite steel-timber structure is estimated.

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Bending Test of the Composite Steel-Timber Beam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.351-352.415 ◽

2013 ◽

Vol 351-352 ◽

pp. 415-421 ◽

Cited By ~ 2

Author(s):

Masanori Fujita ◽

Mamoru Iwata

Keyword(s):

Large Scale ◽

Building Construction ◽

Timber Structure ◽

Bending Test ◽

Structural Performance ◽

Timber Structures ◽

Timber Beam ◽

Structural Variations ◽

Mass Consumption ◽

Composite Steel

In the field of building construction, mass consumption of wood materials contributes to reforestation and becomes the environmental burden reduction. However, an application to conventional timber structures only such as house has a quantitative limit. A newly developed timber structure that is able to make a large-scale building is expected. A composite steel-timber structure will be one of the effective methods to expand the structural variations. In this paper, the bending test of composite steel-timber beam classified typical joint methods is conducted to grasp basic structural performance.

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Etude de l'aménagement d'une forêt classée au Mali avec la participation des populations riveraines - Données du problème et éléments de méthodologie | A Study of the Management of a State-Owned Forest in Mali with the Participation of the Population Living nearby - Issue under Investigation and Elements of Methodology

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.2000.0080 ◽

2000 ◽

Vol 151 (3) ◽

pp. 80-83

Author(s):

Pascal Schneider ◽

Jean-Pierre Sorg

Keyword(s):

Natural Resources ◽

Research Methodology ◽

Large Scale ◽

Environmental Context ◽

Forest Resources ◽

The State ◽

Commercial Use ◽

Economic Context ◽

The People

In and around the state-owned forest of Farako in the region of Sikasso, Mali, a large-scale study focused on finding a compromise allowing the existential and legitimate needs of the population to be met and at the same time conserving the forest resources in the long term. The first step in research was to sketch out the rural socio-economic context and determine the needs for natural resources for autoconsumption and commercial use as well as the demand for non-material forest services. Simultaneously, the environmental context of the forest and the resources available were evaluated by means of inventories with regard to quality and quantity. According to an in-depth comparison between demand and potential, there is a differentiated view of the suitability of the forest to meet the needs of the people living nearby. Propositions for a multipurpose management of the forest were drawn up. This contribution deals with some basic elements of research methodology as well as with results of the study.

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A gravity model of the basement structure in the Santa Maria Basin, California

Geophysics ◽

10.1190/1.1442167 ◽

1986 ◽

Vol 51 (5) ◽

pp. 1127-1140 ◽

Cited By ~ 2

Author(s):

Paul M. Kieniewicz ◽

Bruce P. Luyendyk

Keyword(s):

Short Wavelength ◽

Large Scale ◽

Bouguer Anomaly ◽

Three Dimensional ◽

Average Density ◽

Structure Model ◽

Basement Structure ◽

Santa Maria Basin ◽

Clastic Rocks ◽

Santa Maria

The Santa Maria Basin in southern California is a lowland bounded on the south by the Santa Ynez River fault and on the northeast by the Little Pine‐Foxen Canyon‐Santa Maria River faults. It contains Neogene sedimentary rocks which rest unconformably on a basement of Cretaceous and older clastic rocks. Analysis of over 4 000 gravity stations obtained from the Defense Mapping Agency suggests that the Bouguer anomaly contains a short‐wavelength component arising from a variable‐density contrast between the basin’s Neogene units and the Cretaceous basement. A three‐dimensional inversion of the short‐wavelength component (constrained by wells drilled to basement) yields a structure model of the basement and the average density of the overlying sediments, assuming that the basement does not contain large‐scale density variations. The density anomalies modeled in the Neogene sediments, showing higher densities in the basin troughs, can be related to diagenetic changes in the silica facies of the Monterey and Sisquoc formations. The basement structure model shows the basin as composed of parallel ridges and troughs, trending west‐northwest and bounded by steep slopes interpreted as fault scarps. The basin is bounded on the west by a north‐south trending slope which may also represent a fault scarp.

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A Framework and Case Study for Earthquake Vulnerability Assessment of Incrementally Expanding Buildings

Earthquake Spectra ◽

10.1193/011116eqs010m ◽

2017 ◽

Vol 33 (4) ◽

pp. 1369-1384 ◽

Cited By ~ 4

Author(s):

David Lallemant ◽

Henry Burton ◽

Luis Ceferino ◽

Zach Bullock ◽

Anne Kiremidjian

Keyword(s):

Large Scale ◽

Building Construction ◽

Risk Assessment Models ◽

Earthquake Vulnerability ◽

Valley Area ◽

Common Understanding ◽

Dynamic Structural Analysis ◽

Neighborhood Level ◽

Over Time

This study proposes a framework for incorporating time-dependent fragility into large-scale risk assessment models, focusing on incremental building expansion as a significant driver of changes in vulnerability. In rapidly urbanizing areas in developing countries, the pay-as-you-go process of informal building construction and staged expansion is the de facto pattern of growth. While there is a common understanding that such expansions increase the earthquake vulnerability of buildings, this study proposes a framework to model and quantify this increase. Vulnerability curves are developed through incremental dynamic structural analysis for common building expansion typologies. Building expansions are modeled as Markov chain processes and used to simulate stochastic expansion sequences over a building's lifetime. The model is then used to simulate a hypothetical neighborhood in the Kathmandu valley area to understand neighborhood-level risk over time. The study provides a new methodology to analyze changing seismic risk over time, driven by any building modification that impacts the building's vulnerability (incremental expansion, deterioration, retrofit, etc.).

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The Modern Timber-Structure Building from the Perspective of Tectonic

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.2265 ◽

2014 ◽

Vol 638-640 ◽

pp. 2265-2268

Author(s):

Shuang Qiu

Keyword(s):

Modern Architecture ◽

Timber Structure ◽

Architecture Design ◽

Building Structure ◽

Structural System ◽

The Real ◽

Structure Building ◽

Real Material

Modern architecture design lays more emphasis on the authenticity and regionality of the building.The basic tectonic principles are the real material performance and real construction expression. Architecture artistic is based on the internal expressive force of the structural system. And the logicality of building structure is given the inner beauty of architectural image. Modern timber-structure building is breaking the fetter of formalism in the aspect of structure performance. Its tectonic methods are making the positive exploration in terms of the architectural context inheritance.

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Building system for a composite steel-timber structure

Steel Construction ◽

10.1002/stco.201410032 ◽

2014 ◽

Vol 7 (3) ◽

pp. 183-187

Author(s):

Masanori Fujita ◽

Junpei Sakai ◽

Hirotaka Oda ◽

Mamoru Iwata

Keyword(s):

Timber Structure ◽

Building System ◽

Composite Steel

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Collaborative Governance for Planted Forest Resources

Collaborative Governance of Forests ◽

10.2307/j.ctv1qv33p.11 ◽

2018 ◽

pp. 163-198

Author(s):

Noriko Sato ◽

Takahiro Fujiwara ◽

Vinh Quang Nguyen

Keyword(s):

Collaborative Governance ◽

Forest Resources ◽

Planted Forest

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Characterization of Path Loss and Large-Scale Fading for Rapid Intervention Team Communication in Underground Parking Garages

Sensors ◽

10.3390/s19112431 ◽

2019 ◽

Vol 19 (11) ◽

pp. 2431 ◽

Cited By ~ 1

Author(s):

Seppe Van Brandt ◽

Robbe Van Thielen ◽

Jo Verhaevert ◽

Tanja Van Hecke ◽

Hendrik Rogier

Keyword(s):

Large Scale ◽

Path Loss ◽

Wireless Channel ◽

Building Structure ◽

Propagation Channel ◽

Parking Garage ◽

High Penetration ◽

Parking Garages ◽

Intervention Team

This paper reports the characterization of the 2.45-GHz-ISM-band radio wave propagation channel. Specifically, measurements were performed in an underground parking garage, with the aim of optimizing breadcrumb systems for a Rapid Intervention Team application. The effects of the high penetration loss and large reflections by the concrete reinforced building structure on the path loss and the large-scale fading were studied. Based on the analysis of the wireless channel, critical points for reliable communication between members of a Rapid Intervention Team were identified. In particular, attention was paid to dealing with large, spatially confined signal losses due to shadowing, the anticipation of corner losses and the ability of the system to operate on multiple floors.

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