Residual behaviour of corroded reinforcements after high temperature exposure

Ba, Guangzhong; Zhou, Jiaxin; Dong, Mingchao; Liu, Chongxun; Ma, Zhiming

doi:10.1016/j.istruc.2022.10.023

Cited by 4 publications

(1 citation statement)

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“…The diameter of the longitudinal rebar used in shear walls and beams is 10 mm and 8 mm, respectively, and the yield strength and ultimate strength of the rebar are 410 MPa and 600 MPa, respectively. The diameter of the other rebar is 6 mm, and the yield strength and ultimate strength of the rebar are 331 MPa and 471 MPa, respectively (Ba et al, 2022). The spacing of stirrups in the shear wall is 75 mm and 150 mm.…”

Section: Experimental Overviewmentioning

confidence: 99%

Mechanical behavior of ECC-reinforced coupled shear wall

Zhao,

Zhang,

Liu

et al. 2024

IJSI

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PurposeBased on the weak seismic performance and low ductility of coupled shear walls, engineered cementitious composites (ECC) is utilized to strengthen it to solve the deformation problem in tall buildings more effectively and study its mechanical properties more deeply.Design/methodology/approachThe properties of reinforced concrete coupled shear wall (RCCSW) and reinforced ECC coupled shear wall (RECSW) have been studied by numerical simulation, which is in good agreement with the experimental results. The reliability of the finite element model is verified. On this basis, a detailed parameter study is carried out, including the strength and reinforcement ratio of longitudinal rebar, the placement height of ECC in the wall limb and the position of ECC connecting beams. The study indexes include failure mode and the skeleton curve.FindingsThe results suggest that the bearing capacity of RECSW is significantly affected by the ratio of longitudinal rebar. When the ratio of longitudinal rebar increases from 0.47% to 3.35%, the bearing capacity of RECSW increases from 250 kN to 303 kN, an increase of 21%. The strength of longitudinal rebar has little influence on the bearing capacity of RECSW. When the strength of the longitudinal rebar increases, the bearing capacity of RECSW increases little. The failure mode of RECSW can be improved by lowering the casting height of the ECC beam in a certain range.Originality/valueIn this paper, ECC is used to strengthen the coupled shear wall, and the accuracy of the finite element model is verified from the failure mode and skeleton curve. On this basis, the casting height of the ECC casting wall limb, the strength and reinforcement ratio of longitudinal rebar and the position of the ECC beam are studied in detail.

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Section: Experimental Overviewmentioning

confidence: 99%