Analysis Of Structural Aspects Research Articles

Influence of Plastic Anisotropy on the Limit Load of an Overmatched Cracked Tension Specimen

Plastic anisotropy is a common property of many metallic materials. This property affects many aspects of structural analysis and design. In contrast to the isotropic case, there is a great variety of yield criteria proposed for anisotropic materials. Moreover, even if one specific yield criterion is selected, several constitutive parameters are involved in it. Therefore, parametric analysis of structures made of anisotropic materials is quite cumbersome. The present paper demonstrates the effect of the constitutive parameters involved in Hill’s quadratic yield criterion on the upper bound limit load for weld stretched overmatched tension specimens containing a crack of arbitrary shape, assuming that the crack is located inside the weld. Different sets of the constitutive parameters are involved in the yield criteria for weld and base materials. Since the limit load is an input parameter of many flaw assessment procedures, the final result of the present paper shows that it is necessary to take into account plastic anisotropy in these procedures. It is worthy of note that the limit load is involved in the flaw assessment procedures in combination with the stress and strain fields near the tip of a crack. In anisotropic materials, these fields may become non-symmetric even under symmetric loading. This behavior affects the propagation of cracks.

Traffic Sensing Methodology Combining Influence Line Theory and Computer Vision Techniques for Girder Bridges

Collecting the information of traffic load, especially heavy trucks, is crucial for bridge statistical analysis, safety evaluation, and maintenance strategies. This paper presents a traffic sensing methodology that combines a deep learning based computer vision technique with the influence line theory. Theoretical background and derivations are introduced from both aspects of structural analysis and computer vision techniques. In addition, to evaluate the effectiveness and accuracy of the proposed traffic sensing method through field tests, a systematic analysis is performed on a continuous box-girder bridge. The obtained results show that the proposed method can automatically identify the vehicle load and speed with promising efficiency and accuracy and most importantly cost-effectiveness. All these features make the proposed methodology a desirable bridge weigh-in-motion system, especially for bridges already equipped with structural health monitoring system.

A study of a tensegrity structure for a footbridge

It is known that tensegrity systems are made of isolated bars subjected only to compression, connected by stretched cables. The use of these structures comes with advantages such as making large openings and low consumption of materials. This paper analyses the problems related to the building and calculation of a 36-meter-long pedestrian bridge. The structure of the bridge is made up of a double arch of compressed bars and tensioned cables, which supports the path by means of cables. The structure has a number of kinematics degrees of freedom and is statically indeterminate in the same time, which means that it can be pretensioned. Pretensioning introduces compression efforts in the bars and tension efforts in the cables, which fixes the kinematic degrees of freedom and confers rigidity to the system, thus resulting a structure which can support the external loads. The paper deals with aspects of structural analysis and static calculation of the structure subjected to loads.

Teaching the Ineffable Through Narrative

The concept of faith is a dominant motif in both Jewish and Christian Scriptures and yet the authors never chose to give faith a clear, concise definition in propositional formulations. Both Testaments repeatedly refer to its importance but only approach the subject by telling stories where this valued aspect is present or absent. Luke follows suit with the rest of the Gospels and the precedent set in the Jewish Scriptures. It heralds faith’s importance and necessity but never defines faith with theological statements. Using aspects of Structural Analysis, an adaptation of Form Criticism, the narratives in Luke will be investigated for how faith was taught and by whom.

Promoting reflection in asynchronous virtual learning spaces: Tertiary distance tutors’ conceptions

<p>Increasingly, universities are embedding reflective activities into the curriculum. With the growth in online tertiary education, how effectively is reflection being promoted or used in online learning spaces? Based on the notion that teachers’ beliefs will influence their approaches to teaching, this research sought to understand how a group of distance tutors at the UK Open University conceptualised reflection. It was hoped that these findings would illuminate their approaches to promoting reflection as part of their online pedagogies. Phenomenographic analysis indicated that these tutors conceptualised reflection in four qualitatively different ways. Furthermore, the data suggested that these educators held a combination of two conceptions: one that understood the origin of being reflective and one that understood the purpose of reflection. Analysis of structural aspects of these conceptions offered insight into tutors’ own perspectives for what is needed to make online learning environments fertile territory for reflective learning. </p>

Testable Subsystems Generation for Fault Detection and Isolation Using a Structural Matching Rank Algorithm Testability of an Electrical Circuit

In this study, an advanced way of dealing with testable subsystems and residual generation for fault detection and isolation based on structural analysis is presented. The developed technique considers execution issues; therefore, it has a more realistic point of view compared to classical structural approaches available in the literature. First, theoretical aspects of structural analysis are considered and introduced. Then the way of incorporating them to test the structural proprieties is explained. Finally, we show how the proposed (upgraded) matching rank algorithm can be used in order to choose the most suited matching that leads to computational sequences and detection tests. The method is demonstrated using an electrical circuit.

Changing Structure of Employment in the Brazilian Economy: 1996 and 2002 Compared (Mudanças Estruturais Do Emprego Na Economia Brasileira: 1996 E 2002 Comparados)

With the implementation, in 1994, of the Real plan in the Brazilian economy, and the consequent price stabilization, the analysis of structural aspects of the economy has gained importance. Among these aspects, considering the needs for labor absorption in the economy, one of the main concerns relates to the question of employment. This paper deals with it by making an analysis of the changes in the employ distribution relating to modifications of productive structure in the Brazilian economy, between 1996 and 2002. The analytical method used input-output matrices and its correspondent theory. The efforts concentrated on input-output matrix construction for the year 2002 and comparative analysis, applying several techniques and parameters. A series of indicators were estimated, this allowed to make an analysis about the structural aspects of the Brazilian economy and to relate it with the employment changes occurred in the period being considered.

Damage of skeletal muscle in rats by immunoglobulins. II. Ultrastructural studies.

An experimental model of the autoimmune process was developed to study the ultrastructural aspects of immunomyopathies. Every type of muscle fibre organelle was affected and the severity of injury increased in direct proportion to time following immunization. It is suggested that ultrastructural methods are useful in studies concerned with the analysis of structural aspects of experimental immunomyopathies.