Reinforced Concrete Structures: Testing, Modelling and Assessment

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (20 November 2021) | Viewed by 8688

Special Issue Editors


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Guest Editor
Institute of Structural Engineering (IKI), Hochschule Biberach, Karlstraße 6-11, 88400 Biberach an der Riß, Germany
Interests: structural engineering; structural reliability; punching shear failure of flat slabs, footings, and ground slabs; textile-reinforced concrete; anchoring technology; properties of structural materials

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Guest Editor
RWTH Aachen University, Institute of General Mechanics, Eilfschornsteinstraße 18, 52062 Aachen, Germany
Interests: experimental mechanics; non-destructive testing; structural health monitoring; time reversal methods; elastic wave propagation

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Guest Editor
Institute of Structural Engineering (IKI), Hochschule Biberach, Karlstraße 6-11, 88400 Biberach an der Riß, Germany
Interests: structural engineering; structural reliability; computational analysis; properties of structural materials

Special Issue Information

Dear Colleagues,

It is widely acknowledged that reinforced concrete (RC) remains a core material in the building sector. However, now more than ever, modern societies are urged to think (again) about the challenges and enablers of this material, while facing demands for longer service lives and lower environmental footprints. Hence, further scientific understanding is needed to reduce continuing epistemic uncertainties of RC associated with environmental and mechanical stressors and material properties, and to adopt the most recent advancements in testing, monitoring and modelling techniques and tools in current practice.

Motivated by this need, this Special Issue in Applied Sciences reports on scientific developments of RC applied to new and existing structures. Thus, we strongly encourage you to send manuscripts containing scientific findings in this field on the following topics: lab and field testing on structural members; non-destructive testing; innovative cementitious materials; metallic and non-metallic reinforcement; structural analysis and design; modelling time-dependent behavior and deterioration; stochastic modeling of loads and resistances; computational analysis; and safety and reliability assessment. Both theoretical and practice-oriented papers, including case studies and reviews, are also recommended.

Prof. Dr. Marcus Ricker
Dr. Georg Kocur
Dr. Tânia Feiri
Guest Editors

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Keywords

  • testing of structural members
  • non-destructive testing
  • innovative materials
  • metallic and non-metallic reinforcement
  • structural analysis and design
  • computational analysis
  • safety and reliability assessment

Published Papers (3 papers)

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Research

12 pages, 3266 KiB  
Article
Reliability Assessment of RC Bridges Subjected to Seismic Loadings
by Daniel Herrera, Gerardo Varela and Dante Tolentino
Appl. Sci. 2022, 12(1), 206; https://doi.org/10.3390/app12010206 - 25 Dec 2021
Cited by 2 | Viewed by 2555
Abstract
An approach to estimate both the reliability index β and its complement, the probability of failure, through closed-form expressions that consider aleatory and epistemic uncertainties, is proposed. Alternatively, exceedance demand rates are obtained based on simplified expressions and numerical integration. Reliability indicators are [...] Read more.
An approach to estimate both the reliability index β and its complement, the probability of failure, through closed-form expressions that consider aleatory and epistemic uncertainties, is proposed. Alternatively, exceedance demand rates are obtained based on simplified expressions and numerical integration. Reliability indicators are calculated, considering the uncertainties in the compressive strength of concrete, steel yield, and section geometry, together with the aleatory uncertainties related to seismic loadings. Such indicators are estimated in a continuous RC bridge located in Acapulco, Guerrero, Mexico. The bridge was designed to comply with a drift of 0.004. Exceedance demand rates for drift thresholds from 0.001 to 0.012 are estimated, and maximum differences of 5.5% are found between the closed-form expression and numerical integration. The exceedance demand rate expressed by means of its inverse, the return period, indicates that the serviceability limit state is exceeded after 58 years of the bridge construction. The reliability index decreases by about 1.66%, and the probability of failure increases by about 16.1% when the epistemic uncertainties are considered. The approach shows the importance of epistemic uncertainties in the estimation of reliability indicators. Full article
(This article belongs to the Special Issue Reinforced Concrete Structures: Testing, Modelling and Assessment)
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27 pages, 8268 KiB  
Article
Investigations on Interface Shear Fatigue of Semi-Precast Slabs with Lattice Girders
by Matthias Hillebrand, Maximilian Schmidt, Katrin Wieneke, Martin Classen and Josef Hegger
Appl. Sci. 2021, 11(23), 11196; https://doi.org/10.3390/app112311196 - 25 Nov 2021
Cited by 11 | Viewed by 1842
Abstract
Due to their high cost efficiency and flexibility, semi-precast concrete slabs with lattice girders are widely used in constructions all over the world. Prefabricated concrete slabs, combined with in situ concrete topping, exhibit a quasi-monolithic structural behavior in which lattice girders serve as [...] Read more.
Due to their high cost efficiency and flexibility, semi-precast concrete slabs with lattice girders are widely used in constructions all over the world. Prefabricated concrete slabs, combined with in situ concrete topping, exhibit a quasi-monolithic structural behavior in which lattice girders serve as vertical shear reinforcement and ensure the transfer of longitudinal shear within the interface, acting in combination with concrete-to-concrete bonding mechanisms. To be applicable in industrial and bridge construction, semi-precast slabs need to have sufficient resistance against fatigue failure. To improve and expand the limits of application, theoretical and experimental investigations are conducted at the Institute of Structural Concrete (IMB), RWTH Aachen University. To investigate the fatigue behavior of lattice girders, small size tests with lattice girder diagonals were carried out. These test results have been used to derive an SN curve (S: stress, N: number of load cycles) for lattice girders for a more refined fatigue design. Subsequently, the fatigue behavior of semi-precast slabs with lattice girders was investigated by fatigue tests on single-span slab segments. The fatigue design regulations of lattice girders according to technical approvals can generally be confirmed by this test program; however, they tend to be conservative. The use of the derived SN curve leads to significantly improved agreement of fatigue behavior observed in tests and design expressions. Full article
(This article belongs to the Special Issue Reinforced Concrete Structures: Testing, Modelling and Assessment)
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28 pages, 12764 KiB  
Article
The Behaviour of Half-Slabs and Hollow-Core Slab in Four-Edge Supported Conditions
by Jakub Zając, Łukasz Drobiec, Radosław Jasiński, Mirosław Wieczorek, Wojciech Mazur, Krzysztof Grzyb and Artur Kisiołek
Appl. Sci. 2021, 11(21), 10354; https://doi.org/10.3390/app112110354 - 04 Nov 2021
Cited by 4 | Viewed by 3271
Abstract
In this study, qualitative tests were carried out to compare the behaviour of selected slabs exposed to short- and long-term loading. Full-scale models of the half-slab and hollow-core slab with dimensions of 6.30 m × 6.30 m, built of four different precast panels, [...] Read more.
In this study, qualitative tests were carried out to compare the behaviour of selected slabs exposed to short- and long-term loading. Full-scale models of the half-slab and hollow-core slab with dimensions of 6.30 m × 6.30 m, built of four different precast panels, were tested. The first two were semi-precast lattice girder slabs, the third semi-precast prestressed ribbed panels, and the last was composed of hollow-core panels. A common feature was the lack of joint reinforcement and the same modular width of 600 mm. The short-term load was applied sequentially in the first stage, and displacement was measured using an electronic method. In the second stage of long-term testing, the load was mainly applied to one part of the slab. Testing under short-term and long-term load allows determining the change in the performance of panel slabs over time. The panels maintained the ability of load redistribution based on their interaction despite the work of the longitudinal joints being only through the concrete cross-section. The behaviour of slabs with concrete topping shows more significant lateral interactions than elements connected only by shear key. Comparative calculations were made based on four computational models. Comparative analysis showed that the current design procedures lead to a safe but conservative estimation of the slab behaviour. Full article
(This article belongs to the Special Issue Reinforced Concrete Structures: Testing, Modelling and Assessment)
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