Time dependent reliability of structural systems subject to deterioration

Ciampoli, Marcello

doi:10.1016/s0045-7949(97)00153-3

Cited by 43 publications

(20 citation statements)

References 3 publications

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“…Extensive research has been carried out on probabilistic modeling of deterioration in structural systems, as reviewed by Frangopol et al (2004). Furthermore, methods for reliability analysis of deteriorating structural systems have been developed over the past two decades, including works by Mori and Ellingwood (1993), Li (1995), Ciampoli (1998), Estes and Frangopol (1999) and Stewart and Val (1999). These methods enable the computation of the time-variant reliability of structures with deteriorating elements, which in the general case is a highly complex task.…”

Section: Introductionmentioning

confidence: 99%

Reliability Acceptance Criteria for Deteriorating Elements of Structural Systems

Straub

Kiureghian

2011

J. Struct. Eng.

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A systematic approach to determining reliability-based acceptance criteria for deteriorating elements in structural systems is proposed, as a basis for calibration of safety factors in codes and standards and for verifying acceptability of inspection and maintenance strategies for specific structures. The goal is to establish deterioration acceptance criteria for the elements of a structural system in compliance with criteria formulated for the system. Existing methods significantly overestimate the deterioration reliability of redundant structural systems because they neglect the joint effect of deterioration failures of different elements. To more realistically capture the load-sharing behavior of deteriorating redundant structural systems, it is proposed to establish deterioration acceptance criteria based on easily computable, idealized structural systems, which are calibrated to the characteristics of the real structure. The approach is validated on an example structural system and is found to represent a significant improvement over current methods. The paper concludes with a study of the main factors influencing acceptance criteria of deterioration reliability.

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Section: Introductionmentioning

confidence: 99%

Reliability Acceptance Criteria for Deteriorating Elements of Structural Systems

Straub

Kiureghian

2011

J. Struct. Eng.

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“…A stochastic damage accumulation model can be used as an alternative approach in some instances to assess the time-dependent reliability of a structural component subject to deterioration over time [9][10][11]. [The nature of the available supporting data often dictates which approach is more appropriate for reliability-based condition assessment.]…”

Section: Stochastic Model Of Structural Damage Accumulationmentioning

confidence: 99%

“…Some examples are presented in [11,13]. The procedures above can be applied to the analysis of the time-dependent reliability of structural systems, having defined the system by minimum cut set or minimal path set representations.…”

Section: L(t)= P{ Tl --> T} = S (~T)h E Tm Ph(t)mentioning

confidence: 99%

Probabilistic methods for assessing current and future performance of concrete structures in nuclear power plants

Ciampoli

Ellingwood

2002

Mat. Struct.

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Concrete safety-related structures and components in nuclear plants may be exposed to aggressive service and environmental effects that may cause their strength and stiffness to deteriorate over an extended period of service. A performance assessment of an existing structure subject to deterioration requires a consideration of likely degradation mechanisms, a framework for managing the inevitable uncertainties in operating or environmental loads, capacities, and nondestructive evaluation technologies, and tools for determining whether the observed degradation impacts the remaining service life or safety margin of the plant to any significant degree. Research is in progress to support the development of condition assessment tools and guidelines using modern structural reliability analysis methods

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“…Conception and project errors, technological control of materials, improper execution of said structure, added to the misuse and lack of preventive maintenance, originate the pathological manifestations. Apart from natural catastrophes, that demand from the structure much more than it was built to stand, the pathological manifestations originate summarily from human error [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of structural integrity of a non-completed 28 year-old building in the city of Patos de Minas (MG)

2016

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Factors such as durability and performance must be the guideline in the design of any building, since most of the pathological manifestations that affect the buildings are associated with construction stages, from project design to use of the structure, severely influencing the useful life of structure. This work aims to diagnose the pathological manifestations of the current reinforced concrete structures in the urban environment, through a case study. The inspections were carried out in an anonymous non-completed building in Patos de Minas (MG), with an estimated age of 28 years. It was carried out the diagnosis of the main pathological manifestations and prognosis of the analyzed system. It used to inspections in the field-visual and detailed-and laboratory tests, such as measurement of propagation velocity of ultrasonic waves, reinforcement locate (scan), rebound hammer test, compressive strength test, Brazilian disk test, capillary water absorption test and carbonation depth measurement test. The pathological manifestations found in the concrete structure analyzed were cracking, peeling, carbonation and reinforcement corrosion. The value of rebound and ultrasonic pulse velocity obtained were relatively high (around 58 rebound and velocity of 4000 m/s), due to advanced carbonation (average across 30 mm). Already water absorption by capillary found in the laboratory was high too (in the range from 6105.17 to 30181.64 g/m 2 ). Due to the high degree of deterioration, corrective or recovery measures are not applicable.

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Time dependent reliability of structural systems subject to deterioration

Cited by 43 publications

References 3 publications

Reliability Acceptance Criteria for Deteriorating Elements of Structural Systems

Reliability Acceptance Criteria for Deteriorating Elements of Structural Systems

Probabilistic methods for assessing current and future performance of concrete structures in nuclear power plants

Analysis of structural integrity of a non-completed 28 year-old building in the city of Patos de Minas (MG)

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