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Computers and Concrete Volume 19, Number 5, May 2017 , pages 579-588 DOI: https://doi.org/10.12989/cac.2017.19.5.579 |
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Numerical modeling of the aging effects of RC shear walls strengthened by CFRP plates: A comparison of results from different \"code type\" models |
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Redha Yeghnem, Hicham Zakaria Guerroudj, Lemya Hanifi Hachemi Amar, Sid Ahmed Mefta, Samir Benyoucef, Abdelouahed Tounsi and El Abbas Adda Bedia
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| Abstract | ||
| Creep and shrinkage are the main types of volume change with time in concrete. These changes cause deflection, cracking and stresses that affect durability, serviceability, long-term reliability and structural integrity of civil engineering infrastructure. Although laboratory test may be undertaken to determine the deformation properties of concrete, these are time-consuming, often expensive and generally not a practical option. Therefore, relatively simple empirically design code models are relied to predict the creep strain. This paper reviews the accuracy of creep and shrinkage predictions of reinforced concrete (RC) shear walls structures strengthened with carbon fibre reinforced polymer (CFRP) plates, which is characterized by a widthwise varying fibre volume fraction. This review is yielded by three commonly used international \"code type\" models. The assessed are the: CEB-FIP MC 90 model, ACI 209 model and Bazant & Baweja (B3) model. The time-dependent behavior was investigated to analyze their seismic behavior. In the numerical formulation, the adherents and the adhesives are all modelled as shear wall elements, using the mixed finite element method. Several tests were used to demonstrate the accuracy and effectiveness of the proposed method. Numerical results from the present analysis are presented to illustrate the significance of the time-dependency of the lateral displacements and eigenfrequencies modes. | ||
| Key Words | ||
| RC shear walls strengthened; CFRP plates; creep and shrinkage; finite element method; seismic behavior; numerical modeling | ||
| Address | ||
| Redha Yeghnem: 1) Department of Civil Engineering and Hydraulics, University Dr. Tahar Moulay, PBox 138 City En-Nasr 20000 Saida, Algeria 2) Laboratory of Materials and Hydrology (LM&H), University Djillali Liabés, Sidi Bel Abbès, Algeria Hicham Zakaria GUERROUDJ and Lemya HANIFI HACHEMI AMAR: Department of Civil Engineering and Hydraulics, University Dr. Tahar Moulay, PBox 138 City En-Nasr 20000 Saida, Algeria Sid Ahmed Meftah: Laboratory of Structures et Matériaux Avancés dans le Génie Civil et Travaux Publics (SMAGCTP), University Djillali Liabés, Sidi Bel Abbès, Algeria Samir Benyoucef and El Abbas Adda Bedia: Laboratory of Materials and Hydrology (LM&H), University Djillali Liabés, Sidi Bel Abbès, Algeria Abdelouahed Tounsi: 1) Laboratory of Materials and Hydrology (LM&H), University Djillali Liabés, Sidi Bel Abbès, Algeria 2) Laboratory of Structures et Matériaux Avancés dans le Génie Civil et Travaux Publics (SMAGCTP), University Djillali Liabés, Sidi Bel Abbès, Algeria | ||