Impact of construction errors on the structural safety of a post-tensioned reinforced concrete bridge

Galvão, Neryvaldo; Matos, José C.; Hajdin, Rade; Ferreira, Luı́s Pinto; Stewart, Mark G.

doi:10.1016/j.engstruct.2022.114650

Cited by 7 publications

(4 citation statements)

References 36 publications

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“…During the mass construction period that began in the 1960s, quality control requirements were less stringent than today [6]. Digitalization was also not available in the construction industry at that time.…”

Section: Introductionmentioning

confidence: 99%

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Common Defects of Prefabricated Prestressed Elements for Industrial Construction

Krzywoń,

Hulimka

2024

Buildings

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This manuscript attempts to classify typical errors occurring during the design, production, and use of prefabricated and prestressed concrete girders and slabs manufactured in Poland for industrial buildings since the 1950s. Although the cases discussed concern Poland, most of them have a universal character, and as such are also found in other countries. The defects and errors are illustrated with examples and the causes of their occurrence are also discussed. A method of classifying flaws based on the period of their occurrence was proposed. Most of the examples discussed were encountered by the authors during their professional work. In most of the presented cases, repair was possible, enabling further safe operation. This paper shows how important it is to periodically check the technical condition of prestressed structures and how common and at the same time trivial mistakes may be made by designers and contractors of this type of structure, despite the experience of over 70 years of their mass use. The quality of modern prestressed structures is undoubtedly higher. Using the experience of previous generations, designers and contractors abandoned the less durable post-tensioned concrete lattice girders. Errors, if they appear, are most often at the stage of implementing new products or are the result of poor workmanship or disregard for unfavorable weather conditions.

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Section: Introductionmentioning

confidence: 99%

“…They illustrate the most common, but also less typical, examples of errors made by designers, manufacturers, and users of prestressed concrete structures. It is estimated that as many as 17% of structure failures are caused during the construction phase due to human errors [6,8].…”

Section: Introductionmentioning

confidence: 99%

Common Defects of Prefabricated Prestressed Elements for Industrial Construction

Krzywoń,

Hulimka

2024

Buildings

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“…Currently, some prestressed concrete bridges which were built in the 1960s have been in service for over 60 years [1]. Many of them have been in poor technical condition with respect to their overall deterioration risk.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Precast Segmental Bridge built in 1960s using External Tendons

Moravcik,

Bujnakova,

Kralovanec

2023

ce papers

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Recently more attention has been paid to ageing infrastructure under increased traffic on the roads in Slovakia. As a result, selected prestressed concrete bridges have been inspected. Evidence of their poor technical condition has been discovered including serious faults such as large permanent deflection, wide cracks, extensive prestressing degradation, and others. The original conceptual design and poor quality of prestressing steel protection are often the decisive factor. This paper provides an example of bridge rehabilitation design of the concrete precast segmental bridge in an emergency condition. The bridge in question which is located over the water reservoir Ruzin was built in 1967 as one of the first‐generation precast segmental bridges in Slovakia. Its service life was successfully extended using structural system modification and strengthened using external prestressing. The initial assumptions for the rehabilitation have been based on the detailed analysis of the defects, and assessment of existing conditions including the analytical approach of residual prestressing determination. This concept represents the potential solution for achieving enhanced service life of similar bridges.

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“…Such an approach can give us a better picture of the state of the prestressed concrete structure. Moreover, some authors also describe the importance of the application of construction error models in order to the definition of partial safety factors and future revisions of design and assessment codes [5]. Therefore, regular inspections and determination of prestressing of existing structures can also help the administrators in decision-making.…”

mentioning

confidence: 99%

Parametric Study of Drilling Method Performed on One-Way Post-Tensioned Slabs

Kraľovanec¹,

Moravčík

2023

Civil and Environmental Engineering

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Determination of the stress state in concrete structures is a very important, but difficult task. In the case of new structures, it is possible to easily instal measurement instruments which can provide important data as a part of real-time monitoring. However, the evaluation of stresses in existing structures is much more challenging. Currently, stress relief methods are a well-established approach for the evaluation of the actual state of existing structures. The so-called Drilling method (also known as Stress-relief coring technique) is one of the possible techniques for such analysis. For practical use of this method, knowledge of pivotal factors which influence stress relief is crucial. Therefore, this paper presents a parametric study performed on a one-way post-tensioned slab which can help to understand the effect of the depth of the core and the distance from the edge of the hole (position of strain gauges) on the change in stress in the vicinity of the drilled core. Finally, based on the obtained data, the recommendations for the subsequent experimental program will be summarized. According to the study, it seems that the depth of drilled core does not significantly influence the stress relief and the main impact can be attributed to distance from the edge of the hole.

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Impact of construction errors on the structural safety of a post-tensioned reinforced concrete bridge

Cited by 7 publications

References 36 publications

Common Defects of Prefabricated Prestressed Elements for Industrial Construction

Common Defects of Prefabricated Prestressed Elements for Industrial Construction

Strengthening of Precast Segmental Bridge built in 1960s using External Tendons

Parametric Study of Drilling Method Performed on One-Way Post-Tensioned Slabs

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