Fatigue lifetime of a RC bridge along the Carajás railroad

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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Human error impact in structural safety of a reinforced concrete bridge

Structure and Infrastructure Engineering ◽

10.1080/15732479.2021.1876105 ◽

2021 ◽

pp. 1-15

Author(s):

Neryvaldo Galvão ◽

José C. Matos ◽

Daniel V. Oliveira ◽

Rade Hajdin

Keyword(s):

Reinforced Concrete ◽

Human Error ◽

Structural Safety ◽

Concrete Bridge ◽

Reinforced Concrete Bridge

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

Research Society and Development ◽

10.33448/rsd-v10i5.14579 ◽

2021 ◽

Vol 10 (5) ◽

pp. e4810514579

Author(s):

Renan Gustavo Pacheco Soares ◽

Gustavo Gutierrez de Oliveira Rodrigues ◽

Iago Davi Lins de Moraes ◽

Carla Renata Xavier Pacheco ◽

Lyneker Souza de Moura ◽

...

Keyword(s):

Reinforced Concrete ◽

Concrete Bridge ◽

Structural Elements ◽

Unskilled Labor ◽

Structural Element ◽

Reinforced Concrete Bridge ◽

Useful Life ◽

And Performance ◽

The City

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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The Numerical Analysis of Thermally-Induced Damage of Concrete Bridge in Fire

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.268-270.190 ◽

2011 ◽

Vol 268-270 ◽

pp. 190-194

Author(s):

Wei Qi Chen ◽

Yong Ding ◽

Jian Ke Zhang ◽

Zhi Kun Yao ◽

Li Ping Zhou

Keyword(s):

Finite Element Method ◽

Reinforced Concrete ◽

Structural Behavior ◽

Transient Temperature ◽

Concrete Bridge ◽

Reinforced Concrete Structure ◽

Thermally Induced ◽

Reinforced Concrete Bridge ◽

Transient Temperature Field ◽

In Fire

High temperature in fire have serious influences on the structural behavior of reinforced concrete structure, and causes damage in structure, even leads to overall collapse. By thermal and structural analysis using finite element method, the whole-course behavior of a reinforced concrete bridge in fire is simulated, and the transient temperature field, deformation and stress is discussed. These information supply the basis for fire resistance of concrete bridge design.

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