The effect of materials on the reliability of reinforced concrete beams in normal and intense corrosions

Ghanooni-Bagha, Mohammad; Shayanfar, Mohsen Ali; Reza-Zadeh, Omid; Zabihi-Samani, Masoud

doi:10.17531/ein.2017.3.10

Cited by 25 publications

(8 citation statements)

References 28 publications

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“…Today, a significant number of RC structures are subject to corrosion for various reasons, including the use of inadequate primary materials or improper handling during construction, as well as special environmental conditions [2]. Corrosion in reinforced concrete, with a change in the mechanical properties of reinforcement and concrete, will have a devastating effect on the capacity and ductility of members of the reinforced concrete structure as well as its seismic behavior and seismic performance during earthquake [3]. As the most important of these effects, it can be mentioned that the reduction of the cross-sectional area and the yield strength of reinforcement bars, the reduction of the compressive strength and tensile strength of the concrete and the bonding between the concrete and reinforcement, the occurrence of internal cracks in the members, and cracks in the coverage area on the reinforcements in Effect of increasing pressure on corrosion production [4].…”

Section: Introductionmentioning

confidence: 99%

Time-dependent Seismic Performance Assessment of Corroded Reinforced Concrete Frames

Ghanooni-Bagha

Zarei

Savoj

et al. 2019

Period. Polytech. Civil Eng.

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In this study, effects of reinforcement corrosion such as reinforcement cross section reduction, steel yield strength and concrete compressive strength reduction on RC member capacity decrease are studied. Next, a two-dimensional reinforced concrete moment resistant frame is modeled to evaluate the effects of moderate and severe intensity corrosion on moment-curvature behavior of elements and structure seismic response under nonlinear analysis. Structure capacity curves in push-over analysis and failure curves resulted from IDA for both the structure without and with corrosion are obtained and the effects of reinforcement’s corrosion on the reinforced concrete frame seismic performance are determined through comparing the results. The results revealed that in terms of amount, place and type of corrosion in the reinforced concrete frame, value of the reduction resisting moment of elements is different. Furthermore, the outcomes of nonlinear analyses showed that the capacity of structure is reduced and its seismic performance level is changed as a result of corrosion.

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Section: Introductionmentioning

confidence: 99%

Time-dependent Seismic Performance Assessment of Corroded Reinforced Concrete Frames

Ghanooni-Bagha

Zarei

Savoj

et al. 2019

Period. Polytech. Civil Eng.

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“…Moreover, control schemes such as linear quadratic gaussian (LQG), H 2 and H ∞ require a heavily constrained solution (Amezquita-Sanchez et al 2016). Recent studies have concentrated on soft-computing techniques such as fuzzy logic controller lead to desirable results and reducing computational efforts (Ghanooni-Bagha et al 2017;Zabihi-Samani and Ghanooni-Bagha 2018).…”

Section: Introductionmentioning

confidence: 99%

Optimal Semi-active Structural Control with a Wavelet-Based Cuckoo-Search Fuzzy Logic Controller

Zabihi-Samani

Ghanooni-Bagha

2018

Iran J Sci Technol Trans Civ Eng

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An adjustable cuckoo-search wavelet-based fuzzy logic controller (ACSWBFLC) is introduced to mitigate structural responses during seismic motion by using magnetorheological (MR) dampers. The ACSWBFLC incorporates four algorithms: discrete wavelet transform (DWT), fuzzy logic controller (FLC), modified Bouc-Wen model and geometrical nonlinearity algorithm. DWT is applied to acquire the local energy distribution of seismic excitation over the frequency bands. These online data are transmitted to FLC to operate MR damper intelligently based on online excitation frequency. Furthermore, modified Bouc-Wen phenomenological algorithm was utilized to generate the nonlinear behavior of the MR dampers. A wavelet low-pass filter is employed to prevent the stabilization of coefficients and minimize the computational burden. Moreover, geometrical nonlinearities were considered to design a more robust controller. Furthermore, a novel evolutionary algorithm of cuckoo search was used to optimize the placement and the number of MR dampers and sensors in the sense of minimum resultant vibration magnitude. Numerical efforts were considered to validate the efficiency of the proposed FLC. From a designer's point of view, the proposed ACSWBFLC controller can determine the optimal solutions during a reasonable number of iterations. Finally, numerical examples are utilized to demonstrate the efficiency of ACSWBFLC under several far-and near-fault seismic excitations. The results indicate that ACSWBFLC attenuates the excessive responses of the structural building in real time more efficiently than traditional FLC controllers by using appropriate control force.

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“…Up to date -750 million tons of the FA is generated each year in the world (Blissett and Rowson 2012;Ghanooni-Bagha et al 2017). In the future, it should be expected to increase this quality to 2100 million tons in 2031-32 (Amini and Zabihi-Samani 2014;Hemalatha and Ramaswamy 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of Fly Ash on Mechanical Properties of Concrete

Zabihi-Samani

Mokhtari

Raji

2018

Journal of Applied Engineering Sciences

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Cement is a common and widespread building material over the world. Similarly, carbon dioxide emissions have been significantly increased due to cement production. Alternative low-carbon binders rather than cement have been progressively sought in recent years. Fly ash was found as an available option, since it is being largely disposed annually as a waste material. In this research several studies have been reviewed and recent applications of fly ash on concrete specification, including strength and fracture toughness of green concrete have been perused. Furthermore, transport properties of high volume fly ash after exposure to high temperature and influence of curing temperature on strength development of fly ash-recycled concrete aggregate blends have been investigated. The investigated test results showed that the properties of composites incorporating fly ash depend on the age of the concrete. Test results also revealed that transport properties of concrete increased notably after exposure to 400cº and the results achieved on fly ash-recycled concrete aggregate led to the conclusion that 15% FA is the optimum blend for road stabilization applications.

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The effect of materials on the reliability of reinforced concrete beams in normal and intense corrosions

Abstract: GhAnooni-BAGhA M, ShAyAnfAr MA, rezA-zAdeh o, zABihi-SAMAni M. The effect of materials on the reliability of reinforced concrete beams in normal and intense corrosions. eksploatacja i niezawodnosc -Maintenance and reliability 2017; 19 (3): 393-402, http://dx.doi.

Cited by 25 publications

References 28 publications

Time-dependent Seismic Performance Assessment of Corroded Reinforced Concrete Frames

Time-dependent Seismic Performance Assessment of Corroded Reinforced Concrete Frames

Optimal Semi-active Structural Control with a Wavelet-Based Cuckoo-Search Fuzzy Logic Controller

Effects of Fly Ash on Mechanical Properties of Concrete

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