ANALYSE OF STRENGTH GLUED-IN STEEL RODS INSTALLED IN LVL BY TAKING INTO ACCOUNT STRENGTH BY SHERE
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 176, Issue 10
Abstract
The glued-in steel rods as an effective method for performing rigid joints of timber structures are used in joints of elements from new wood based materials, including veneer based. The LVL elements has high strength characteristics and requires a special approach when evaluating methods for calculating and designing known methods for making nodal connections, including joints on glued rods. The analysis of the strength of pasted rods performed in this article is considered taking into account the strength of the beam of lamellar timber during shearing as the main criterion for the destruction of this type of joint. Also, in determining strength of LVL for shearing along the fibers, various types and sizes of the samples were considered with aim of identify the sample most accurately showing the strength of LVL for this type of joint. Comparison of the test results of this type of joints in the LVL beam is important and necessary in assessing not only the strength of the joint, but also for the implementation of design screw reinforcements to achieve ductile failure mode. The laminated veneer structure of LVL with a unidirectional arrangement of veneers reflects the nature of the destruction of the specimens, which differs from the results of the destruction of glued-in steel rods in the glued laminated timber. Characteristic for LVL timber was the destruction of the wood with ovalization around the rod. The comparative analysis of the experimental values of the specimens and joints obtained during testing is approximate. When the LVL specimens are destroyed, a plane stress state is considered, which corresponds to fracture along an even line along the grains of the test sample. However, when the pasted strings are broken, the stress state of the wood is localized around the rod and has a closed curvilinear trajectory of fracture, usually conical in shape along the length of the rod.
Authors and Affiliations
Ievgenii Raspopov
Keywords
Related Articles
- EP ID EP357281
- DOI 10.18664/1994-7852.176.2018.131193
- Views 54
- Downloads 0
FEATURES OF TRAINING MOVEMENT OF TRAINS ON RAILWAY LINES OF INTERREGIONAL COMMUNICATION
Speed of the movement of passenger trains is the most important indicator of quality of passenger traffic. Successful integration of the Belarusian railroad into the world transport market requires development of high-sp...
IMPROVING THE FUNCTIONING QUALITY URHC IN HIGH-SPEED CONDITIONS
In the article it is investigated the current state of high-speed rail transport in Ukraine and the main problems of its development. The domestic and international experience in the implementing of high-speed traffic on...
DETERMINATION OF THE NECESSITY OF THE STRENGTH OF THE LAYING LAYER OF BALLASTLESS BRIDGE DECK ON THE STAGES OF INSTALLATION AND OPERATION
In recent years significantly increased the volume of work associated with the bridge replacement canvas on wooden bar in. Besides ending the life of ballastless bridge deck, which have begun to use more than 40 years ag...
STUDYING THE EFFECT OF MINERAL FILLERS ON THE FIRE-RELEASE CHARACTERISTICS OF WATER-DISPERSION PAINT-AND-PAINT COATINGS
Development paint and varnish compositions to protect metal and non-metallic surfaces is one of the priorities of fire safety in the operation and repair of rolling stock, since the cost of measures aimed at eliminating...
RESEARCH OF SURFACES OF RESPONSE OF INDEXES OF DURABILITY OF THE HAULING GEARING WITH THE DIFFERENT DEGREES OF WEAR OF PROFILES OF POINTS
The urgency of developments aimed at further improvement of repair technologies for traction gears of railway rolling stock is substantiated. As one of the promising areas of such works, studies have been made of the cha...