scholarly journals Determination of Road Bridge Load -Carrying Capacity

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Josef Vičan ◽  
Jaroslav Odrobiňák ◽  
Jozef Gocál
Keyword(s):  
Carrying Capacity ◽  
General Concept ◽  
Load Carrying Capacity ◽  
The Road ◽  
Analysis Task ◽  
Load Carrying ◽  
Technological Standard ◽  
Bridge Reliability ◽  
The University

Abstract In frame of global European standardization and as consequence of new knowledge concerning the existing bridge reliability, the need for revision of the Technological Standard No. 104 “Load-carrying capacity of road bridges and footbridges” [1] (hereinafter referred to as TS 104) had started up. In the first stage of the revision, the preparation and analysis in the form of Analysis Task (hereinafter referred to as AT) has been worked up by the collective of the Department of Structures and Bridges from the University of Zilina in cooperation with Slovak Road Administration (SRA), National Motorway Company (NMC) and other co-operators among academicians and designers. In the presented paper, the attention is paid to the general concept and basic assumptions of the AT and revised TS 104 for determining the road bridge load-carrying capacity.

scholarly journals Determination of Load-Carrying Capacity of C-Profile Glued Ti-Al Column under Temperature Environment

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3013
Author(s):  
Leszek Czechowski
Keyword(s):  
Carrying Capacity ◽  
Tensile Tests ◽  
Discrete Models ◽  
Image Correlation ◽  
Load Carrying Capacity ◽  
Lagrange Equations ◽  
Load Carrying ◽  
Different Temperatures ◽  
Influence Of Temperature On

The paper deals with an examination of the behaviour of glued Ti-Al column under compression at elevated temperature. The tests of compressed columns with initial load were performed at different temperatures to obtain their characteristics and the load-carrying capacity. The deformations of columns during tests were registered by employing non-contact Digital Image Correlation Aramis® System. The numerical computations based on finite element method by using two different discrete models were carried out to validate the empirical results. To solve the problems, true stress-logarithmic strain curves of one-directional tensile tests dependent on temperature both for considered metals and glue were implemented to software. Numerical estimations based on Green–Lagrange equations for large deflections and strains were conducted. The paper reveals the influence of temperature on the behaviour of compressed C-profile Ti-Al columns. It was verified how the load-carrying capacity of glued bi-metal column decreases with an increase in the temperature increment. The achieved maximum loads at temperature 200 °C dropped by 2.5 times related to maximum loads at ambient temperature.

STABILITY PROBLEMS OF STEEL‐CONCRETE MEMBERS COMPOSED OF HIGH‐STRENGTH MATERIALS

2010 ◽  
Vol 16 (3) ◽  
pp. 352-362 ◽  
Author(s):  
Zdeněk Kala ◽  
Libor Puklický ◽  
Abayomi Omishore ◽  
Marcela Karmazínová ◽  
Jindřich Melcher
Keyword(s):  
Theoretical Analysis ◽  
Experimental Research ◽  
Carrying Capacity ◽  
High Strength ◽  
Statistical Characteristics ◽  
Load Carrying Capacity ◽  
Limit States ◽  
Load Carrying ◽  
Geometrical Imperfections

The presented paper deals with the stochastic analysis of the ultimate limit states of steel‐concrete building members. The load carrying capacity of steel‐concrete columns, comprising of steel profiles encased in high strength concrete, in compression is analyzed. The first part of the paper lists assumptions for the determination of the theoretical load carrying capacity of the column. Principles of elasticity and plasticity are used to determine stresses in the concrete and steel sections. Statistical characteristics of input material and geometrical imperfections are listed. Results of the theoretical analysis are then compared with results of experimental research. Statistical characteristics of obtained results of the theoretical analysis were verified using statistical characteristics obtained from experimental research. Numerical simulation LHS and Monte Carlo methods, which take into account the influences of variability of input imperfections, were employed. The influence of the utilization of the plastic reserve in the determination of the load carrying capacity of the analysed strut is shown. The influence of the initial geometric imperfections of initial strut curvature on the load carrying capacity is also presented. Santrauka Straipsnyje pateikta plienbetonio pastatu elementu didžiausiu ribiniu būkliu stochastine analize, analizuojama plienbetonio kolonu, sudarytu iš plieniniu profiliuočiu, padengtu didelio stiprio betonu, laikomoji galia gniuždant. Pirmoje straipsnio dalyje išvardytos kolonos teorines laikomosios galios nustatymo prielaidos. Tamprumo ir plastiškumo principai taikyti itempiams betono ir plieno skerspjūviuose nustatyti. Nustatytos medžiagu ir geometriniu defektu statistines charakteristikos, teorines analizes rezultatai palyginti su eksperimentiniu tyrimu rezultatais. Teorines analizes metu gautu rezultatu statistines charakteristikos patikrintos taikant iš eksperimentiniu tyrimu gautus statistinius rodiklius. Pritaikytas skaitinis modeliavimas LHS ir Monte Karlo metodais, kurie ivertina pradiniu defektu kintamumo itaka. Parodyta plastiškumo atsargos naudojimo itaka, nustatant analizuojamojo statramsčio laikomaja galia, pateikta pradinio statramsčio išlinkio pirminiu geometriniu defektu itaka laikomajai galiai.

Mechanical properties of confirmat screws corner joints made of native wood and wood-based composites

2019 ◽  
Vol 105 ◽  
pp. 76-84
Author(s):  
NADEŽDA LANGOVÁ ◽  
PAVOL JOŠČÁK
Keyword(s):  
Mechanical Properties ◽  
Carrying Capacity ◽  
Limit State ◽  
Calculated Data ◽  
Statistical Processing ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Characteristic Values ◽  
State Method

Mechanical Properties of Confirmat Screws Corner Joints Made of Native Wood and Wood-Based Composites. The aim of this investigation was to design and determine the mechanical properties of confirmat screws corner joints made of native wood and wood-based composites. The objective of the study was to ascertain the stiffness and load carrying capacity of joints that differed in the diameter and length of confirmat type screw, as well as in the kind of materials. The results include statistical processing of measured and calculated data, and evaluation of the influence of selected factors on mechanical properties. The results are applied to the calculation of the characteristic values of the properties and to the determination of the equations for their calculation for other values of the selected factors. The characteristic values are used for the evaluation of the joints according to the limit state method.

Theoretical Analysis of Externally Pressurized Air Journal Bearing

1970 ◽  
Vol 12 (2) ◽  
pp. 123-129 ◽  
Author(s):  
B. C. Majumdar
Keyword(s):  
Experimental Data ◽  
Carrying Capacity ◽  
Reynolds Equation ◽  
Journal Bearing ◽  
Design Parameters ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Dimensional Parameters ◽  
Bearing Design

A theoretical investigation is made to predict the performance of an externally pressurized air journal bearing having several pressure sources. The pressure distribution, which leads to the determination of load-carrying capacity and flow requirement, is obtained by solving Reynolds equation numerically. The load and flow, expressed in non-dimensional parameters, are presented for different bearing design parameters (dimensionless). The results predicted by this method are compared with others' experimental data.

Analysis of shear behavior between old concrete and fiber concrete

2021 ◽  
Author(s):  
Martin Vavruš ◽  
Peter Koteš ◽  
František Bahleda ◽  
Jozef Jošt
Keyword(s):  
Carrying Capacity ◽  
Research Work ◽  
Concrete Structures ◽  
Mechanical Damage ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Fiber Concrete ◽  
Different Types ◽  
Thawing And Freezing Cycles

AbstractConcrete structures that are influenced by degradation, overloading, the thawing, and freezing cycles, corrosion of reinforced bars, should be repaired or strengthened. Each of the mentioned influences lead to decreased load-carrying capacity of the structure or its member. Exceeding the load-carrying capacity leads to mechanical damage of members or excessive deformation. The damaged member has to be strengthened to the required level of reliability and load-carrying capacity. There exist many types and methods of strengthening the columns. This research work deals with strengthening of columns by concreting a new layer of fiber concrete. When applying that type of strengthening, it is necessary to assure the contact between the old layer and the new one. The paper deals with analysis of different types of contacts and determination of their parametric values.

Berücksichtigung des Zähnezahleinflusses bei der Bestimmung der Bauteilfestigkeit von Zahnrädern mit experimentell ermittelten Zahnfußtragfähigkeitskennwerten/Consideration of the Influence of the Number of Teeth for the Determination of the Component Strength of Gears with Experimentally Determined Load Carrying Capacity Parameters

Konstruktion ◽  
2021 ◽  
Vol 73 (09) ◽  
pp. 65-73
Author(s):  
Christoph Leonhardt ◽  
Michael Otto ◽  
Karsten Stahl
Keyword(s):  
Carrying Capacity ◽  
Load Carrying Capacity ◽  
Number Of Teeth ◽  
Load Carrying ◽  
Component Strength

Zahnfußtragfähigkeitskennwerte für Zahnräder werden in der Praxis üblicherweise in Pulsator- oder Laufversuchen ermittelt. In den genannten Prüfverfahren liegen, bedingt durch den Aufbau des Prüfgeräts, unterschiedliche Beanspruchungen in den zu prüfenden Zahnrädern vor. Dies kann dazu führen, dass für das selbe Bauteil je nach Prüfverfahren unterschiedliche Tragfähigkeitskennwerte ermittelt werden. Es wird ein statistisches Modell vorgestellt, das den Einfluss der Zahl der beanspruchten Zähne auf die Tragfähigkeitskennwerte eines Zahnrads berücksichtigt, um eine zuverlässige Auslegung eines Getriebesystems sicherzustellen. Basierend auf der Modifikation eines bestehenden Modells kann ein relevanter statistischer Zähnezahleinfluss im Bereich praxisrelevanter Zähnezahlen nachgewiesen werden. Für die praktische Anwendung wurden aus den Ergebnissen der Auswertung des statistischen Modells einfach anwendbare Methoden zur Umwertung von Festigkeitskennwerten im Auslegungsprozess abgeleitet. Diese ermöglichen eine zuverlässige Auslegung von Getriebesystemen, die im Kontext steigender Leistungsdichte und der Umsetzung von Leichtbaukonzepten zunehmend an Bedeutung gewinnt. Die mathematische Formulierung des Ansatzes ermöglicht die einfache Anpassung für die Auswertung anderer Schadensarten, Verteilungsformen und Versuchsstreuungen.

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