Seismic behavior of frost-damaged squat RC shear walls under artificial climate environment: a further experimental research

• Autorzy: Rong Xian-Liang , Zheng Shan-Suo , Zhang Yi-Xin , Dong Li-Guo , Liu Huan , Dai Kuang-Yu

Identyfikatory

DOI

10.1007/s43452-020-00081-7

• Języki publikacji: EN

Abstrakty

EN

In cold environment, the damage of freezing and thawing poses a great threat to the safety of concrete structures. In this study, six frost-damaged squat reinforced concrete (RC) shear walls were subjected to low cyclic reversal loading to investigate the effects of axial compression ratio, concrete strength and freeze-thaw cycles (FTCs) on the seismic performance of squat RC shear walls. The seismic behavior of the test specimens was evaluated in terms of the frost action at the microstructure level, frost-heave crack patterns, damage processes, failure patterns, hysteretic behaviors, skeleton curves, deformations, and energy dissipation capacities. It shows that the boundary elements and distributed reinforcements had obvious restraining effects on the development of frost-heave cracks. The FTC action weakened the load-carrying capacity, energy dissipation capacity, and shear resistance capacity of the walls. When the number of FTCs is kept at 200, with the increase of the concrete strength, the gel structure (C-S-H) gradually evolved from fibrous to nets, also the width and number of frost-heave cracks started to reduce, and the distribution of frost-heave cracks evolved from the middle of the specimen to the perimeter. Moreover, the energy dissipation capacity and the ratio of the shear displacement on the whole displacement after cracking loading condition started to increase.

Słowa kluczowe

EN

cold climate; FTCs; seismic performance; squat RC shear wall; axial load ratio; concrete strength

PL

wytrzymałość betonu; ściana żelbetowa; klimat zimny

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 4
• Strony: 103--124
• Opis fizyczny: Bibliogr. 47 poz., rys., wykr.

Twórcy

autor

Rong Xian-Liang

• College of Civil Engineering, Tongji University, Shanghai 200092, China
• School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

autor

Zheng Shan-Suo

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

autor

Zhang Yi-Xin

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

autor

Dong Li-Guo

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

autor

Liu Huan

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

autor

Dai Kuang-Yu

• Department of Civil and Environmental Engineering, University of Auckland, Auckland, New Zealand

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)