scholarly journals Experimental study on the effectiveness of finger joint with variations in wood species toward bending strength of glulam beams

2019 ◽  
Vol 361 ◽  
pp. 012038
Author(s):  
B Anshari ◽  
A Rofaida ◽  
F Mahmud ◽  
Pathurahman ◽  
R Rahmalia
Keyword(s):  
Experimental Study ◽  
Wood Species ◽  
Bending Strength ◽  
Finger Joint

Experimental study of fire effects on out-of-plane bending strength/flexibility of steel tubular T-joints

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 2174-2188
Author(s):  
F. Ahmadpour ◽  
M. Zeinoddini ◽  
M. Mo'tamedi ◽  
R. Rashnooie
Keyword(s):  
Experimental Study ◽  
Bending Strength ◽  
Fire Effects ◽  
T Joints ◽  
Out Of Plane ◽  
Plane Bending

EXPERIMENTAL STUDY ON DURABILITY OF ROOM TEMPERATURE CURING UFC MORTAR

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Haruka Murakami ◽  
Hiromi Fujiwara ◽  
Masanori Maruoka ◽  
Takahumi Watanabe ◽  
Koji Satori
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
High Performance ◽  
Room Temperature ◽  
Bending Strength ◽  
High Performance Concrete ◽  
Drying Shrinkage ◽  
Concrete Repair ◽  
Repair Materials ◽  
Low Salt

In recent years, as structures become higher, larger, and more durable concrete whose compressive strength of the concrete is 150 N/mm 2 or more have been put to practical use. It is for this reason that it is necessary to develop strengthening materials with equal or better performance. Furthermore, the development of high-performance concrete repair materials is carried out because demand to seismic strengthening and repair increases. In this study, considering these circumstances, it was conducted an experimental study with the aim of developing a repair material using room temperature curing UFC (R-UFC). A binder composition preparation of the R-UFC has excellent fluidity under pressure. It was achieved that high-grade thixotropy, high compressive strength, and high bending strength. It can also be sprayed continuously because of its high thixtoropy. It was confirmed that the sprayed thickness was reached to 20mm by one work. Durability of this R-UFC was investigated and it was confirmed the high sulfate resistance, small drying shrinkage and low salt permeability.

scholarly journals Experimental Study on Sandwich Bridge Decks with GFRP Face Sheets and a Foam-Web Core Loaded under Two-Way Bending

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Ruili Huo ◽  
Weiqing Liu ◽  
Li Wan ◽  
Yuan Fang ◽  
Lu Wang
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Bending Strength ◽  
Bridge Decks ◽  
Sheet Thickness ◽  
Highway Bridges ◽  
Bending Stiffness ◽  
Face Sheet ◽  
Displacement Ductility ◽  
Ultimate Bending Strength

In recent years, the sandwich bridge decks with GFRP face sheets and light weight material core have been widely used in the world due to their advantages of low cost, high strength to weight ratios, and corrosion resisting. However, as the bridge decks, most of them are used in foot bridges rather than highway bridges because the ultimate bending strength and initial bending stiffness are relatively low. To address this issue and expand the scope of use, a simple and innovative sandwich bridge deck with GFRP face sheets and a foam-web core, manufactured by vacuum assisted resin infusion process, is developed. An experimental study was carried out to validate the effectiveness of this panel for increasing the ultimate bending strength and initial bending stiffness under two-way bending. The effects of face sheet thickness, foam density, web thickness, and web spacing on displacement ductility and energy dissipation were also investigated. Test results showed that, compared to the normal foam-core sandwich decks, an average approximately 657.1% increase in the ultimate bending strength can be achieved. Furthermore, the bending stiffness, displacement ductility, and energy dissipation can be enhanced by increasing web thickness, web height, and face sheet thickness or decreasing web spacing.

Experimental Study on Mechanical Properties of Recycled Asphalt Mixture with Different Proportion of Rubber Powder

2013 ◽  
Vol 368-370 ◽  
pp. 933-938 ◽  
Author(s):  
Qi Ying Niu ◽  
Jun Yong Zhao ◽  
Ru Kai Li
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Tensile Strength ◽  
Bending Strength ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Rubber Content ◽  
Recycled Asphalt ◽  
Rubber Powder ◽  
Different Content

Through a series of mechanical properties experiment of recycled asphalt mixture composed of waste asphalt mixture 20% and different content of rubber powder, the paper analyzes and compares the elasticity, tensile strength and bending strength of asphalt mixture and recycled asphalt mixture, concluding that recycled asphalt mixture that mixed with crumb rubber content of 20% can completely replace the new asphalt mixture in the application. It has great significance for the future to recycling waste asphalt mixture in the highway.

scholarly journals Experimental Study of the Bending Strength of Recycled Concrete and Wooden Waste by Heating Compaction

2020 ◽  
Author(s):  
Liang Li ◽  
Yuya Sakai
Keyword(s):  
Experimental Study ◽  
Water Content ◽  
Bending Strength ◽  
Recycled Concrete ◽  
New Approach ◽  
Ordinary Concrete ◽  
Mixture Pressure ◽  
The World ◽  
Recycle Concrete ◽  
Water Contents

A large amount of concrete waste is generated around the world and its recycling is an urgent issue. In this research, a new approach to recycle concrete waste with wooden waste was studied. Concrete and wooden wastes were crushed, mixed, and heat compacted to produce plates with different water contents and mix proportions at various temperatures, pressures, and durations of compaction. The bending strength of the plates was measured after compaction. The result indicated that with an increase in the percentage of wooden waste in the mixture, pressure, or temperature improved the bending strength. The increase in water content reduced the bending strength. Most of the products exhibited higher bending strength than that of ordinary concrete.

scholarly journals Influence of geometry on the stiffness of corner finger joints

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 2946-2960
Author(s):  
Gourav Kamboj ◽  
Vladimír Záborský ◽  
Tomáš Girl
Keyword(s):  
Wood Species ◽  
Polyvinyl Acetate ◽  
Beech Wood ◽  
Bending Moment ◽  
Elastic Stiffness ◽  
Finger Joint ◽  
Finger Joints ◽  
Number Of Teeth ◽  
Fagus Sylvatica L ◽  
Wood Strength

Finger joints enable the full utilization of wood. The finger joint technique is used to eliminate wood defects that would otherwise weaken the wood strength. This research project evaluated how the wood species, adhesive type, and number of teeth affect the elastic stiffness of finger joints. The adhesives used were polyurethane and polyvinyl acetate, and the wood species were beech (Fagus sylvatica L.) and spruce (Picea abies L.). This study also determined the elastic stiffness of finger joints with 2 teeth and 5 teeth. For this purpose, the samples were loaded via a bending moment reaction, with tensile or compression forces in the angular plane. The highest elastic stiffness was obtained from the beech wood samples with 5 teeth bonded with polyvinyl acetate adhesive under tensile stress. Therefore, it was concluded that the elastic stiffness increased when the number of teeth increased. However, further studies on the elastic stiffness of finger joints are necessary in relation to the finger teeth length and surface area of the glue between the finger joint connections.

scholarly journals The Effect of Finger Joint Location on Bending Strength Properties

2013 ◽  
Vol 41 (4) ◽  
pp. 318-326
Author(s):  
Kyung-Rok Won ◽  
Nam-Euy Hong ◽  
Hyun-Soo Ryu ◽  
Han-Min Park ◽  
Hee-Seop Byeon
Keyword(s):  
Bending Strength ◽  
Strength Properties ◽  
Finger Joint ◽  
Joint Location

scholarly journals The usefulness of different wood species for bow manufacturing

2016 ◽  
Vol 58 (4) ◽  
pp. 183-187 ◽  
Author(s):  
Waldemar Moliński ◽  
Przemysław Mania ◽  
Gabriel Tomczuk
Keyword(s):  
Wood Species ◽  
Modulus Of Elasticity ◽  
Bending Strength ◽  
Mechanical Parameters ◽  
Energy Accumulation ◽  
The Past ◽  
Analysis Of Results

Abstract The aim of this study was to define the density and selected mechanical parameters of wood used for bow production at present, and in the past. Properties such as modulus of elasticity, bending strength and energy accumulation were determined for 11 species of wood. The analysis of results revealed that in the past, the wood used for the production of bows was not always most suitable for this application.

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