Cyclic response and shear mechanisms of RC short walls strengthened with engineered cementitious composites thin layers

• Autorzy: Zhang Yangxi , Zhang Shijun , Li Tong , Deng Mingke

Identyfikatory

DOI

10.1007/s43452-023-00683-x

• Języki publikacji: EN

Abstrakty

EN

This paper investigates the effectiveness of engineering cementitious composites (ECC) thin layers for seismic strengthening of reinforced concrete (RC) short walls with high axial load ratios. Three RC short walls with an aspect ratio of 1.1 were tested under cyclic loading: one control wall and two ECC strengthened walls, adopting two different strengthening layer schemes. The results showed that the failure mode, damage tolerance, lateral stiffness, shear strength, and energy dissipation of the strengthened walls were improved to certain extents. The mesh grid ECC layer was proved an effective and applicable technique, the shear strength and energy dissipation of the corresponding strengthened wall were improved by 37.2% and 33.5%, respectively, and the addition of mesh grid and tie bars in the ECC layer prevented the debonding failure at the ECC/concrete interface. Besides, the shear resistance mechanisms of the test specimens were idealized by the strut-and-tie model, the contribution of cracked ECC tensile strength to shear was considered in the horizontal and vertical mechanisms. The predicted shear strengths of the RC walls agreed well with the test values.

Słowa kluczowe

EN

engineered cementitious composite; RC short wall; high axial load ratio; energy dissipation; shear strength

PL

kompozyt cementowy; obciążenie osiowe łożyska; wytrzymałość na ścinanie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e148, 2023
• Opis fizyczny: Bibliogr. 33 poz., fot., rys., wykr.

Twórcy

autor

Zhang Yangxi

• School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
• Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi’an 710055, China

• https://orcid.org/0000-0002-6780-6450

autor

Zhang Shijun

• School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

autor

Li Tong

• School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

autor

Deng Mingke

• School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
• Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi’an 710055, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)