Characterization of the useful life and structural performance of a reinforced concrete bridge in the City of Correntes-PE

Even though we know that the construction industry is constantly evolving, due to the emergence of construction techniques and materials, we note that there are still challenges to be faced: pathological manifestations. These, in turn, compromise the performance and useful life of the elements. Its occurrences are mainly due to the reduction of deadlines, inadequate design solutions, improper use of materials, unskilled labor, lack of maintenance, lack of inspection, among other aspects. The evaluation of a structural element is based on the precedence of guaranteeing durability and quality to ensure the integrity of users. Therefore, this article analyzed structural elements of a reinforced concrete bridge located in the city of Correntes-PE. The main objective of the work was to characterize the main pathological manifestations affecting the structural elements of the bridge. The process of characterization of degrading agents was carried out through non-destructive tests, such as the carbonation front, as provided for in EN 14630 (DIN, 2007) and the evaluation of surface resistance, through the sclerometry test, according to NBR 7584 (ABNT, 2012). The results allowed to characterize the strength of the concrete and the degree of degradation. Points with incidence of carbonation and exposed reinforcement were identified, denoting the need for preventive and corrective intervention, in order to prolong the useful life and performance of the evaluated artwork.

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Fatigue lifetime of a RC bridge along the Carajás railroad

Revista IBRACON de Estruturas e Materiais ◽

10.1590/s1983-41952012000500004 ◽

2012 ◽

Vol 5 (5) ◽

pp. 627-658

Author(s):

R. R. F. Santos ◽

D. R. C. Oliveira

Keyword(s):

Reinforced Concrete ◽

Laboratory Tests ◽

Structural Safety ◽

Structural Behavior ◽

Concrete Bridge ◽

Structural Elements ◽

Fatigue Lifetime ◽

Reinforced Concrete Bridge ◽

Bridge Number

The aim of this paper is to present and discuss the results obtained with a methodology used to characterize the concrete and to evaluate the structural safety against fatigue of the reinforced concrete bridge number 50A located in the Carajás railroad. An "in situ" inspection was carried out in order to assess the evolution of damage in structural elements, with reference to information available in existing projects, calculation memory and reporting of previous inspections. Extractions of concrete testimonies, alkalinity tests, sclerometry, pacometry and laboratory tests were also performed to characterize the materials mechanically and estimate the structural behavior of the bridge under higher future loads.

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Design norms and live load development by the example of saint petersburg depot of reinforced concrete automobile road bridges

Proceedings of Petersburg Transport University ◽

10.20295/1815-588x-2018-3-344-357 ◽

2018 ◽

pp. 344-357

Author(s):

Andrei Belyi ◽

Eduard Karapetov ◽

Ekaterina Tsygankova

Keyword(s):

Reinforced Concrete ◽

Statistical Analysis ◽

Highway Bridges ◽

Concrete Bridge ◽

Live Load ◽

Design Standards ◽

Saint Petersburg ◽

Reinforced Concrete Bridge ◽

Standard Design ◽

The City

Objective: To analyze and cover the statistical data concerning the development and application of live load and relevant design standards by the example of Saint Petersburg bridge constructions. Methods: A comprehensive three-stage analysis of technical documentation on the operated reinforced concrete bridge constructions of the city was applied. Historical and technical review of norms and specifications of design, since the end of the 19th century was conducted. Systematization, statistical analysis and splitting into stages and groups were carried out. Results: The article presents the development of design standards and temporary loads of reinforced concrete highway bridges. The statistics is made on the basis of the depot of Saint Petersburg bridges. The latter is characterized by the increased esthetic, and difficult technical operation features. Classification of temporary loads on structures of Saint Petersburg since 1891 was carried out. The stages of occurrence and formation of circulating load norms were analyzed. A certain feature in regulation of requirements for urban bridges was singled out. Examples of the relevant objects were given. A number of conclusions concerning the evolution of design standards were made. Practical importance: Taking into account the specifi city of the large megalopolis, management of technical condition of bridge constructions in Saint Petersburg represents an extremely responsible and difficult task. Authentic, exact and relevant data on the history of design of facilities, circulating load (both design and current) is necessary for the solution of the task in question. Statistical analysis was carried out to apply operation of reinforced concrete bridge constructions in practice as the most mass transportation facilities of the city. From a practical point of view the data in question will make it possible to provide and support the set standard (design) levels of reliability, safety and durability of bridge constructions with a sufficient share of probability.

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TECHNICAL CONDITION ANALYSIS OF SAINT-PETERSBURG OPERATED REINFORCED CONCRETE BRIDGE CONSTRUCTIONS

Bulletin of Belgorod State Technological University named after V G Shukhov ◽

10.12737/24624 ◽

2017 ◽

Vol 2 (3) ◽

pp. 37-44 ◽

Cited By ~ 1

Author(s):

Белый ◽

Andrey Belyy

Keyword(s):

Reinforced Concrete ◽

Present Article ◽

Evaluation Criteria ◽

Technical Condition ◽

Concrete Bridge ◽

Saint Petersburg ◽

Reinforced Concrete Bridge ◽

Long Time ◽

The City

St. Petersburg possesses a large number of bridge constructions operated throughout a long time. Mainly these are objects made of reinforced concrete. Among bridges of the city there is a set of unique constructions. Specifics of bridges maintenance in megalopolis environment are characterized by difficult climatic and technogenic conditions. It causes emergence and development of numerous defects and damages in designs. For development of scientifically based techniques of assessment and forecasting of technical condition of the operated bridge constructions (in particular, reinforced concrete) the authentic and urgent analysis of this state is necessary. It is possible to execute it, having formulated the corresponding criteria and methods of assessment, and also having created a certain methodology of the analysis, as it is executed in the present article. Six evaluation criteria on which it is possible to carry out complex diagnostics of bridges of St. Petersburg are designated. Results of the analysis confirm need of special approaches to operation of megalopolises bridges park and also on a large number of constructions with extremely unsatisfactory technical condition.

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