Chopinian Particularities in Piano’s Sonata op. 58

2021 ◽  
Vol 13 (62) (SI) ◽  
pp. 69-78
Author(s):  
Lioara FRĂȚILĂ
Keyword(s):  
Structural Integrity ◽  
Classical Type ◽  
Late Period ◽  
Structural Elements ◽  
Piano Sonata ◽  
Strong Connection ◽  
Sonata Cycle ◽  
Aesthetic Results ◽  
The Postponement

The paper herein highlights those aspects of Chopin’s Piano Sonata Op.58 that demonstrate the strong connection with the classical-type sonata, its significance and the evolution of expression. Chopin’s Third Piano Sonata, Op.58 is the largest solo work of his late period. Chopin’s successful combination of the Classical and the Romantic aesthetic, results in an effective balancing of structural integrity and emotional fulfilment. Every moment of Op.58 possesses qualities of movements in a traditional sonata cycle; however, the tendency to blend structural elements, the expansion of thematic material and the postponement of climaxes contribute to Chopin’s distinctive treatment of the sonata genre style include blurring of genres, complex use of chromaticism, intricacy of counterpoint, textural and thematic variety

Connections in Precast Concrete Elements

2016 ◽  
Vol 691 ◽  
pp. 376-387 ◽  
Author(s):  
Ivan Hollý ◽  
Ivan Harvan
Keyword(s):  
Structural Integrity ◽  
Precast Concrete ◽  
Concrete Structures ◽  
Structural Elements ◽  
Entire Structure ◽  
Engineering Department ◽  
Final Design ◽  
Structural Engineer ◽  
Concrete Elements

The structural integrity of precast concrete structures depends mainly on the connections between the precast structural elements. The purpose of a connection is to transfer loads, restrain movement, and/or to provide stability to a component or an entire structure. Therefore, the design of connections is one of the most important aspects in the design of precast concrete structures. All connections should design with valid codes. Every precasters have developed connection details over the years that suit their particular production and erection preferences. It is common, that the structural engineer to show loads and connection locations and allow the successful manufacturer’s engineering department to provide the final design and details of the connections.

Failure Analysis of an Adhesively Bonded Graphite Composite/Steel Scarf Joint

1978 ◽  
Vol 100 (1) ◽  
pp. 64-69 ◽  
Author(s):  
A. B. Macander ◽  
D. R. Mulville
Keyword(s):  
High Performance ◽  
Structural Integrity ◽  
Strain Energy Release ◽  
Organic Matrix ◽  
Structural Elements ◽  
Adhesively Bonded ◽  
Graphite Composite ◽  
Scarf Joint ◽  
Bonded Composite ◽  
Composite Steel

Recent studies on the use of graphite fiber-organic matrix composites in Naval and commercial high performance ships have demonstrated the potential for significant weight savings and corresponding improvements in ship performance. Unlike conventional materials, structural elements fabricated with advanced composite materials require specialized attention. One area that is critical to the successful development of reliable composite structural elements is joining. This paper describes a method for determining the structural integrity of an adhesively bonded composite/steel scarf joint. An experimentally established failure criterion is presented based on a strain energy release rate formulation, which may be used to predict performance of the scarf joint under tensile loading.

Fire Endurance of Concrete Elements Reinforced with GFRP Bars

2013 ◽  
Vol 651 ◽  
pp. 181-186
Author(s):  
Ana Almerich-Chulia ◽  
Jose Molines-Cano ◽  
Pedro Martin-Concepcion ◽  
Juan Rovira-Soler
Keyword(s):  
Fire Resistance ◽  
Structural Integrity ◽  
Fire Spread ◽  
Structural Elements ◽  
Concrete Element ◽  
Loss Of Life ◽  
Fire Engineering ◽  
Fire Endurance ◽  
Concrete Elements ◽  
Mechanics Characteristics

Fire engineering is primarily to prevent loss of life or injury during a fire. Obviously the best way to achieve this is to prevent ignition, minimizing fire spread and smoke, dying the fire before it has fully developed. When this is not possible, when the fire is fully developed, structural elements must guarantee sufficient fire resistance. If containment methods fail, structural integrity must stay for a period long enough to evacuate occupants and firemen put out it. This investigation studies the bearing capacity of GFRP reinforced concrete element, its fire resistance, variations of its mechanics characteristics and its bonding to concrete when temperature rises, together others changes that may occur in the element.

scholarly journals Special Issue on Fracture and Fatigue Assessments of Structural Components

2020 ◽  
Vol 10 (18) ◽  
pp. 6327
Author(s):  
Alberto Campagnolo
Keyword(s):  
Fatigue Life ◽  
Structural Integrity ◽  
Fatigue Loading ◽  
Complex Geometries ◽  
Loading Conditions ◽  
Structural Elements ◽  
Structural Components ◽  
Special Issue ◽  
Linear Elastic ◽  
Life Predictions

This Special Issue covers the broad topic of structural integrity of components subjected to either static or fatigue loading conditions, and it is concerned with the modelling, assessment and reliability of components of any scale. Dealing with fracture and fatigue assessments of structural elements, different approaches are available in the literature. They are usually divided into three subgroups: stress-based, strain-based and energy-based criteria. Typical applications include materials exhibiting either linear-elastic or elasto-plastic behaviours, and plain and notched or cracked components subjected to static or cyclic loading conditions. In particular, the articles contained in this issue concentrate on the mechanics of fracture and fatigue in relation to structural elements from nano- to full-scale and on the applications of advanced approaches for fracture and fatigue life predictions under complex geometries or loading conditions.

scholarly journals SMA-Coated Aluminum Structural Elements with Enhanced-Thermo-Mechanical Performance

2018 ◽  
Vol 27 (4) ◽  
pp. 096369351802700
Author(s):  
D.A. Exarchos ◽  
P.T. Dalla ◽  
I.K. Tragazikis ◽  
K.G. Dassios ◽  
C. De Crescenzo ◽  
...  
Keyword(s):  
Stress Field ◽  
Shape Memory ◽  
Structural Integrity ◽  
Mechanical Performance ◽  
Thermomechanical Properties ◽  
Structural Elements ◽  
Two Phase ◽  
Treatment Conditions ◽  
Local Reduction ◽  
Box Structure

This work presents the development of novel multifunctional Shape Memory Alloy (SMA) coatings aiming to improve the mechanical behavior of structural components, as well as their corrosion resistance. The groundbreaking concept of the new coating material is described briefly as follows: Upon heating, the SMA coating tends to recover its experienced deformation and return to its original shape. At that point, shear forces developing at the interface between coating and structure are expected to mitigate the deformation of the structure and reduce its overall stress field level. The latter is a great benefit for regions where cracks exist, since the local reduction of the stress field will delay the crack propagation and hence the structural failure. Numerical analysis is performed to gain understanding of the expected thermomechanical response of the entire SMA-coated composite structure. The influence of the alloy composition and precipitates on the thermomechanical properties are also examined. The SMA coating is subjected to appropriate processing conditions and deposited on metallic substrates of proper geometry following a custom-designed two-phase process, which enables beneficial shape recovery enabling the efficient mitigation of the structure's deformation. Processing consists of aging heat treatments, which are of paramount importance for endowing the coating with the shape memory effect. The effect of heat treatment conditions on the thermo-mechanical fatigue response of the material was also characterized. The developed SMA coatings on aluminum structural elements can find significant application in aeronautical engineering, as for example in the aircraft wing box structure reinforcement and the fuselage structure to enhance their structural integrity.

Verification of the Ultrasonic Qualification for Structural Integrity of Partially Concrete Embedded Steel Elements

2009 ◽  
Vol 65 ◽  
pp. 69-78 ◽  
Author(s):  
J. Alfredo López ◽  
Francisco J. Carrión ◽  
Juan A. Quintana ◽  
Didier Samayoa-Ochoa ◽  
María G. Lomelí ◽  
...  
Keyword(s):  
Grain Size ◽  
Structural Integrity ◽  
Fatigue Cracks ◽  
Good Condition ◽  
Ultrasonic Inspection ◽  
Structural Elements ◽  
Ultrasonic Evaluation ◽  
Statistical Mechanical ◽  
Microstructural Integrity ◽  
Non Destructive

Failure of one upper anchorage element in a cable-stayed bridge and its consequent analysis concluded that the main cause of the failure was a deficient heat treatment that resulted in large micro structural grain size and low fracture toughness, vulnerable to fatigue damage. Previous research studies demonstrated that ultrasonic evaluation could provide some insight of the microstructural integrity by correlating the ultrasonic response to the grain size. Thus, this technique was used to inspect the 112 elements in service in the bridge and 16 were qualified as structurally deficient, without direct verification of the grain size, since these elements were partially embedded in the concrete structure. Late rehabilitation of the bridge considered the replacement of the 16 structural deficient anchorage elements, plus 4 elements qualified in good condition, to complete a reliability analysis for the remaining 92 elements from the statistical mechanical properties of the removed pieces. Rehabilitation made possible the confirmation of the initial diagnosis made by ultrasonic inspection and fatigue cracks were identified in some elements. This study demonstrated that the ultrasonic non destructive evaluation is highly reliable for structural integrity qualification of steel structural elements partially embedded in concrete.

A new monitoring technique for the grounding grids

2014 ◽  
Vol 4 (3) ◽  
Author(s):  
Y. Chikarov ◽  
T. Lie ◽  
N. Nair
Keyword(s):  
Structural Integrity ◽  
Short Circuit ◽  
Operating Conditions ◽  
Structural Elements ◽  
Protective Relay ◽  
Fault Currents ◽  
Monitoring Technique ◽  
Grounding Grids ◽  
A New Technique ◽  
Short Circuit Fault

AbstractThe performance and reliability of grounding grids depend on its structural integrity. If grounding conductors are damaged, it may cause misoperation of protective relay which leads to trip feeders unnecessarily. It can also cause not only failures on the surroundings such as the grounding grid, secondary circuits’ cables, and structural elements but also voltage hazard for human. The circuits may attain unacceptable voltages when short-circuit fault currents occur in these grids. This paper presents the development of a new technique to monitor the operating conditions of the grounding grids of high voltage apparatus and systems without any diggings and forced outages. New concept, principals, a technique and a device shown in the paper have never been described before by the other authors. The technique is based on the evaluation of the electromagnetic field distribution pattern over the damaged horizontal elements of the grid.

Mechanical Properties of Wood and Timber Bridge Evaluation

2014 ◽  
Vol 587-589 ◽  
pp. 1381-1385
Author(s):  
Ling Ling Yu ◽  
Jie Jun Wang ◽  
Te Huang
Keyword(s):  
Mechanical Properties ◽  
Structural Integrity ◽  
Strength Properties ◽  
Structural Elements ◽  
Bridge Evaluation ◽  
Bridge Structures ◽  
And Performance ◽  
Inspection Techniques ◽  
Non Destructive ◽  
Timber Bridges

Wood possesses material properties that may be significantly different from other materials normally encountered in structural design. It is necessary for the engineer to have a general understanding of the properties and characteristics that affect the strength and performance of wood in bridge applications. This paper discusses the mechanical properties of wood, including elastics properties and strength properties. Timber bridge are often exposed to harsh environment conditions. Over time, this exposure can lead to deterioration. In turn, this deterioration may lead to a loss of structural integrity that is detrimental to the structure and its users. Timber structural elements are susceptible to degradation due to environmental and loading conditions. A variety of inspection techniques can be employed to locate damage and decay in timber members in order to maintain structural performance. Methods of non-destructive techniques for timber bridges are getting more and more important. This paper presents several non-destructive methods to timber bridge structures.

scholarly journals Crack Detection and Localisation in Steel-Fibre-Reinforced Self-Compacting Concrete Using Triaxial Accelerometers

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2044
Author(s):  
Jeffri Ramli ◽  
James Coulson ◽  
James Martin ◽  
Brabha Nagaratnam ◽  
Keerthan Poologanathan ◽  
...  
Keyword(s):  
Crack Detection ◽  
Structural Integrity ◽  
Steel Fibre ◽  
Warning System ◽  
Sensor Technology ◽  
Structural Elements ◽  
Structural Failure ◽  
Self Compacting Concrete ◽  
Three Point Bending ◽  
Large Structures

Cracking in concrete structures can significantly affect their structural integrity and eventually lead to catastrophic failure if undetected. Recent advances in sensor technology for structural health monitoring techniques have led to the development of new and improved sensors for real-time detection and monitoring of cracks in various applications, from laboratory tests to large structures. In this study, triaxial accelerometers have been employed to detect and locate micro- and macrocrack formation in plain self-compacting concrete (SCC) and steel-fibre-reinforced SCC (SFRSCC) beams under three-point bending. Experiments were carried out with triaxial accelerometers mounted on the surface of the beams. The experimental results revealed that triaxial accelerometers could be used to identify the locations of cracks and provide a greater quantity of useful data for more accurate measurement and interpretation. The study sheds light on the structural monitoring capability of triaxial acceleration measurements for SFRSCC structural elements that can act as an early warning system for structural failure.

Restoration of Structural Timber Elements Using Epoxy Resin: Analysis of Mechanical Properties

2013 ◽  
Vol 778 ◽  
pp. 582-587 ◽  
Author(s):  
Marília da Silva Bertolini ◽  
Laurenn Borges de Macedo ◽  
Diego Henrique de Almeida ◽  
Felipe Hideyoshi Icimoto ◽  
Francisco Antonio Rocco Lahr
Keyword(s):  
Cultural Heritage ◽  
Epoxy Resin ◽  
Structural Integrity ◽  
Mechanical Performance ◽  
Structural Characteristics ◽  
Conservation Status ◽  
Wood Properties ◽  
Structural Timber ◽  
Structural Elements ◽  
Structural Shocks

Brazil cultural heritage is composed by numerous constructions that describe the various historical periods lived by country. Constructions arent in good conservation status, showing systematically some deterioration level of their structural elements, among them those of wood. Restoration process aims to preserve the identity of original cultural heritage. It is essential maintain structural characteristics related to mechanical loads response which are closely dependent on wood properties avoiding possible structural shocks. Wood deterioration can be characterized by fungi decay or termite attack. Depending on level and position of the deteriorated area in structural set, local interventions are enough to maintain structural integrity. Polymeric resins are material options that can be used when removed these deteriorated regions, requiring compatibility with wood to maintain structural elements properties. This paper aims use of a technical for restoring structural timber from historic buildings, based on removal of decayed regions and filling them with epoxy resin. To analyze restoration effectiveness, properties in static bending, according to Brazilian standard, were determined. Samples were produced containing one and three restorations along the specimens (105 cm in length and nominal square cross section of 4.5 cm side), on the same side. Samples of Pinus taeda with gaps generated in the specimens with dimensions of 1.10 cm in depth and 8 cm in length were tested, with restorations placed in central region. For grafting of these gaps bicomponent epoxy resin was employed, prepared by mixing components in 1:1.5 proportions. Resin was injected into splices and its cure occurred in a seven days period, using methodology restoration to simulate a situation in which these structural elements have been used. Samples were requested in static bending to obtaining the product of inertia, analyzing the amendment under the aspect of tractioned and as well under compressed edge. It is observed the viability of restoration using filling epoxy resin in timber samples, considering the mechanical performance and practicality of the methodology for local keeping.

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