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A new model for predicting the axial compression capacity of reinforced concrete cylinders strengthened with CFRP

Guo Guang, Zhou Li, Wang Bangkang

Archives of Civil Engineering

2024

Vol. 70, nr 1

389--404

Numerous scholars have identified the shortcomings of imprecise terminology and substantial computational inaccuracies in the current models for predicting the axial compression capacity of CFRPstrengthened reinforced concrete (RC) cylinders. To improve the prediction accuracy of the axial compressive capacity model for CFRP-strengthened RC cylinders, the present axial compressive capacity model for CFRP-strengthened RC cylinders was scrutinized and evaluated. Drawing on Mander’s constraint theory and the concrete triaxial strength model, a novel axial compressive capacity model for CFRP-strengthened RC cylinders was proposed. This study collected 116 experimental data on the axial compression of CFRP-strengthened RC cylinders and analyzed the accuracy of various models using the data. The findings indicate that the model proposed in this study outperforms other models in predicting axial compression capacity and demonstrates high prediction accuracy. Furthermore, an analysis is conducted on the variation law of the model’s predicted value with respect to the design parameters. The proposed model in this study identifies concrete strength, stirrup spacing, and elastic modulus of CFRP as the primary factors that influence the axial compression capacity of CFRP-strengthened RC cylinders.

Assessment of Environmental Performance and Development Sustainability of Systems Product

Majerník Milan, Daneshjo Naqib, Malega Peter, Chlpek Samuel, Popovičová Dominika

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 3

192--200

The current stage of production development is marked by the search for more exact models ensuring its sustainability. This is perceived mainly as a balance of socio-economic and environmental pillars of development activities. The basis for managing the sustainability of socio-economic development and the development of the organization today and in the near future is the assessment of the environmental performance of product systems related to their overall socio-economic value improving the quality of life. In order to simultaneously solve the issue of creating and protecting the environment and ensuring the commercial and economic sustainability of products, it is possible to use the international standard ISO 14045, designed on the basis of the standards for LCA - ISO 1404 and 14044. In relation to sustainable production, it is currently proving to be a very effective addition methodically by linking to the framework green growth indicators from the OBCD level and their integration into the innovation model for assessing the environmental performance and development sustainability of product systems. As part of our research, variants of possible transition paths in the development of a sustainable product were modeled in relation to its future environmental profile.