MATERIALS, STRUCTURAL FAILURES AND DURABILITY

2010 ◽  
pp. 9-28
Keyword(s):  
Structural Failures

Review on Experimental Study on Effect of Corrosion In Reinforced Concrete Fly-Ash Beam

2020 ◽  
pp. 92-96
Author(s):  
Shubham N. Dadgal ◽  
Shrikant Solanke
Keyword(s):  
Fly Ash ◽  
Bond Strength ◽  
Structural Damage ◽  
Pullout Test ◽  
Partial Replacement ◽  
Structural Members ◽  
Accelerated Corrosion ◽  
Resistivity Method ◽  
Electrical Resistivity Method ◽  
Structural Failures

In modern days for structures in coastal areas it has been observed that the premature structural failures are occurs due to corrosion of the reinforcements of the designed structural member. The corrosion causes the structural damage which in turn leads to reduction in the bearing capacity of the concerned structural members. The aim of this study was to study the effect of partial replacement of fly ash to minimize the corrosion effect. Beams were designed and corroded by using artificial method known accelerated corrosion method. The beams were then tested for flexural and bond strength. Also the weight loss of the reinforced bars was been determined using electrical resistivity method. The fly ash will replace by 10% and 15%.The strength will calculate at varying percentage of corrosion at 10% and 15%. Beams will cast at M25 grade concrete. The flexural strength will test by using UTM and the bond strength will calculate using pullout test.

Nonlinear Viscoelastic Finite Element Analysis of Adhesive Joints

1988 ◽  
Vol 16 (3) ◽  
pp. 146-170 ◽  
Author(s):  
S. Roy ◽  
J. N. Reddy
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Viscoelastic Behavior ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Element Analysis ◽  
Adhesively Bonded Joints ◽  
Nonlinear Viscoelastic ◽  
Structural Failures ◽  
Updated Lagrangian

Abstract A good understanding of the process of adhesion from the mechanics viewpoint and the predictive capability for structural failures associated with adhesively bonded joints require a realistic modeling (both constitutive and kinematic) of the constituent materials. The present investigation deals with the development of an Updated Lagrangian formulation and the associated finite element analysis of adhesively bonded joints. The formulation accounts for the geometric nonlinearity of the adherends and the nonlinear viscoelastic behavior of the adhesive. Sample numerical problems are presented to show the stress and strain distributions in bonded joints.

LADA Synchronization for Symmetric and Asymmetric ATE Test Program Cycles

2019 ◽  
Author(s):  
Arun Kumar Karunanithi ◽  
Joseph Caroselli ◽  
Jason Christensen ◽  
Michell Espitia
Keyword(s):  
Cycle Time ◽  
Dwell Time ◽  
Turnaround Time ◽  
Test Program ◽  
Area Of Interest ◽  
Marginal State ◽  
Structural Failures ◽  
Major Factors ◽  
High Level ◽  
Program Cycle

Abstract Laser Assisted Device Alteration (LADA) or Soft Defect Localization (SDL) is commonly used to root cause device marginality due to functional or structural failures. At a high level, LADA involves setting the device under test (DUT) at its marginal state and using focused near infra-red laser beams to perturb sensitive circuitry [1]. Scanning the focused laser beam over the die can be a long and time-consuming process. In this paper, two LADA cases are presented, which involve a parametric measurement failure while running a dynamic ATE test. Using LADA technique, these two cases were root caused. These two cases also explain how a parametric measurement-based LADA can be setup on ATE, as well as a synchronization method independent of vectors in a pattern. Synchronization was necessitated in the 2nd case due to the asymmetric test program loop, as well as the long test program cycle time. There are many factors which impact LADA turnaround time and it can take anywhere between few seconds to one day. The two major factors are the size of the Area of Interest (AOI) and test program cycle time. Test program cycle time influences the laser “dwell time” for LADA. Dwell time, in simple terms, is the total time the laser is parked at each pixel. The laser can also be synchronized with the test program cycle, keeping the two always in phase. This is explained in Case 2, where LADA synchronization was implemented, and the analysis was successfully completed in time, even though the test cycle time was very long.

Automatic Tunnel Monitoring System to Prevent Structural Failures & Collapses

2004 ◽  
Author(s):  
Jung-Yeol Kim ◽  
Soon-Wook Kwon ◽  
Moon-Young Cho
Keyword(s):  
Monitoring System ◽  
Structural Failures ◽  
Tunnel Monitoring

scholarly journals Rethinking Non-Financial Reporting: A Blueprint for Structural Regulatory Changes

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
David Monciardini ◽  
Jukka Tapio Mähönen ◽  
Georgina Tsagas
Keyword(s):  
Financial Reporting ◽  
Final Section ◽  
Thematic Issue ◽  
Revision Process ◽  
The Past ◽  
Regulatory Changes ◽  
Collective Effort ◽  
Key Points ◽  
Structural Failures ◽  
Over Time

AbstractThe article introduces the thematic issue of Accounting, Economics, and Law: A Convivium dedicated to the regulation of non-financial reporting. It provides the reader with an overview of the varying approaches and frameworks that have emerged over time in relation to the reporting of non-financial information. In particular, the article focuses on the European Non-Financial Reporting Directive. We maintain that to date this latter initiative has failed to deliver on its intended objectives. In the context of the ongoing revision process of this initiative, the present paper outlines five key areas to be improved drawing on the lessons learnt from the past as well as from key points raised by the papers in the present thematic issue. What emerges from this collective effort is a renewed agenda that highlights some of the structural failures of the current reporting regime and a blueprint for future reforms. The final section summarises the various contributions of articles included in this thematic issue.

ANALYSIS OF STRUCTURAL FAILURES.

1977 ◽  
Vol 62 (1) ◽  
pp. 51-74 ◽  
Author(s):  
DI BLOCKLEY
Keyword(s):  
Structural Failures

Causes of Structural Failures with Steel Structures

2017 ◽  
Author(s):  
Goran Alpsten
Keyword(s):  
Structural Damage ◽  
Human Error ◽  
Structural Reliability ◽  
Steel Structures ◽  
Fatigue Loading ◽  
Structural Instability ◽  
Human Errors ◽  
Collapse Mode ◽  
Load Carrying ◽  
Structural Failures

This paper is based on the experience from investigating over 400 structural collapses, incidents and serious structural damage cases with steel structures which have occurred over the past four centuries. The cause of the failures is most often a gross human error rather than a combination of “normal” variations in parameters affecting the load-carrying capacity, as considered in normal design procedures and structural reliability analyses. Human errors in execution are more prevalent as cause for the failures than errors in the design process, and the construction phase appears particularly prone to human errors. For normal steel structures with quasi-static (non-fatigue) loading, various structural instability phenomena have been observed to be the main collapse mode. An important observation is that welds are not as critical a cause of structural steel failures for statically loaded steel structures as implicitly understood in current regulations and rules for design and execution criteria.

Quality assurance and quality control to ensure durability

2021 ◽  
Author(s):  
B. C. Roy ◽  
Tanmoy Guha ◽  
R. Ekambaram
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Service Life ◽  
Performance Standards ◽  
Full Compliance ◽  
Design Build ◽  
Adequate Quality ◽  
Structural Failures ◽  
High Level ◽  
Fundamental Requirement

<p>High level of quality during design, design-build and construction stages is a fundamental requirement to ensure that structure serves its intended purpose. Establishment of a quality assurance manual is prime necessity. Lack of quality control during design, review and approving design drawings are major reasons for structural failures. Designers and design checkers need to work in tandem to ensure more adequate Quality Assurance &amp; Control (QA/QC).</p><p>In structural design Durability is a key parameter and becomes critical for service life of 100/120 years. In design build and construction stages controlling work quality is important to maintain performance standards. Tailor made quality plan for Design-build Contract is essential. Quality procedures, inspection and testing needs implementation in practice to verify full compliance and prevent occurrence of faults and defects towards durability and service life. This paper deals with Quality with special emphasis on durability in design and construction through case studies of design build contracts.</p>

Wages of neoliberalism:

2020 ◽  
Vol 2 ◽  
pp. e020014
Author(s):  
Praveen Jha ◽  
Archana Prasad
Keyword(s):  
Social Groups ◽  
Adverse Outcomes ◽  
Emerging Trends ◽  
The World ◽  
Hours Of Work ◽  
Different Dimensions ◽  
Structural Failures ◽  
The Impact ◽  
Conditions Of Work

This essay highlights the impact of neoliberalism on the world of work with particular reference to India. It provides a brief overview of the structural transformations and their impact on the growing vulnerability of workers, with particular focus on the deepening and reconfiguration of informality within the current labour scenario. The first section provides a brief profile of labour in India with a focus on the last decade. It shows how the emerging trends are marked by regional and social unevenness, with particularly adverse outcomes for women and vulnerable social groups. The second section explores different dimensions of growing insecurity of work, particularly with respect to hours of work and wages. The third section examines some of the major reasons for deteriorating conditions of work by locating in an overview of the long-term structural failures and the ascendency of neoliberal policies in the recent years. In the fourth section we follow this up by a discussion of the recent State-led labour reforms and their role in accelerating flexibilisation in the world of work and the essay closes with a very brief concluding remark regarding the contemporary labour scenario in section five.

Sign in / Sign up

Export Citation Format

Share Document