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Publisher: ISSR Journals (Total: 3 journals) [Sort alphabetically]

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	CFD Letters (Followers: 8)
	Challenge J. of Concrete Research Letters (Followers: 5)
	Intl. J. of Innovation and Applied Studies (Followers: 4)

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Challenge Journal of Concrete Research Letters
Number of Followers: 5

This is an Open Access Journal

Open Access journal
ISSN (Online) 2548-0928
Published by ISSR Journals

[3 journals]

Optimization of reinforced concrete frame structures and matrix
displacement method
- Authors: Muhammed Çoşut; Gebrail Bekdaş, Sinan Melih Nigdeli
  Abstract: In this study, reinforced concrete frame system is generated, and all structural elements which are beam and columns are optimized according to the applied distributed loads and different concrete classes by using Matlab program. Jaya algorithm which is a Metaheuristic Algorithm that enables to optimization process and finds the best cross sections, reinforcement area as well as cost of the system, is proposed. It is observed that cross-section, reinforced area as well as cost of the system are changed when concrete classes are used differently. After finding the optimum design values for frame system, the matrix displacement method is utilized to specify the system displacements and all nodes forces. Furthermore, columns and beam displacement results are not similar, and also internal forces are different for nodes. TS500 (2000) (Reinforced concrete structures design and construction rules) and TBDY (2018) (Turkey Building Earthquake Regulation) are used together to specify variables, constraints and also necessity values. The proposed method is feasible for frame structures consisting of different members.
  PubDate: Tue, 07 Mar 2023 16:29:34 +030
Cause of distress of an old building through analytical and
micro‒analytical methods ‒ a case study
- Authors: Rajappan Preetha; Kalpana Kumari, Balakrishnan Sakthi, Chandrasekharan Nair Harikumar, Haneef Ibrahim Abdul Gani
  Abstract: The case study pertains to the methods such as nondestructive, semi-destructive, chemical, electrochemical and micro-analytical, utilized to assess the cause of cracking and spallation of a reinforced concrete building near to the eastern coastline of India. Cause of degradation of the structure is assessed to arrive at the appropriate repair methodology. From the analysis methods, direct cause of failure could not be attributed to a single cause since many factors co-exist such as structural cracking, carbonation and presence of chloride and the synergistic effect; hence concludes that an appropriate repair methodology has to be evolved to address each issue.
  PubDate: Tue, 07 Mar 2023 16:29:34 +030
Cover & Contents Vol.14 No.1
- Authors: Journal Management CJCRL
  PubDate: Tue, 07 Mar 2023 16:29:34 +030
Axial compression behaviour of concrete-filled auxetic tubular short
columns
- Authors: Kemal Solak; Süleyman Nazif Orhan
  Abstract: Concrete-filled steel columns (CFSCs) are of great interest in the literature as they are capable of carrying higher loads by combining the exceptional qualities of steel and concrete. With auxetic materials being introduced to civil engineering applications, the influence of these materials on CFSCs remains a matter of curiosity. The current study implements a nonlinear finite element analysis to evaluate the performance of circular CFSCs with six auxetic tubes under axial compression and the proposed numerical model was validated using published experimental data. The effect of the auxetic steel tube’s porosity and Poisson’s ratio on CFSCs was examined parametrically in terms of ultimate strength using the confined concrete model. Moreover, the stress distributions of the concrete and the auxetic steel tubes were also thoroughly examined. Based on the findings of the analysis, the ultimate load of CFSCs, utilising auxetic tubes with the same density and porosity but different Poisson’s ratio, increased proportionally with the increase of auxetic behaviour. When it comes to auxetic tubes with different densities and porosities, the influence of the Poisson’s ratio of the tubes diminished and the stiffness of tubes became more dominant over the mechanical characteristics of columns as the density of the auxetic steel tubes increased or decreased. The stiffness of the auxetic tubes reduced as porosity increased, as did the ultimate load of the columns. Additionally, the ultimate loads of the auxetic steel tube columns are found to be lower than those of bare steel tube columns filled with concrete due to perforations.
  PubDate: Tue, 07 Mar 2023 16:29:34 +030