Effect of shear-span ratio and vertical reinforcement ratio on the failure of geometrical-similar RC shear walls. (September 2022)

• Record Type: Journal Article
• Authors: Miao, Liyue; Jin, Liu; Li, Dong; Du, Xiuli; Zhang, Binlin
• Is Part Of: Engineering failure analysis. Volume 139(2022)
• Publication Date: 2022-09
• Subjects: RC shear wall -- Shear span ratio -- Vertical reinforcement ratio -- Size effect -- Meso-scale numerical simulation; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2022.106407
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: The failure mode of shear walls changes from shear failure to bending failure with the increase of shear span ratio. The increasing shear span ratio makes shear capacity of shear wall decrease and weaken the size effect. The increasing vertical reinforcement ratio makes shear capacity increase slightly, but has no effect on size effect. A novel size effect law for shear failure of RC shear walls is developed. Abstract: The purpose of this study is to investigate the size effect on reinforcement concrete (RC) shear walls having different shear span ratios and vertical reinforcement ratios by the two-dimensional (2D) meso-scale simulation method. Firstly, the meso-scale simulation method was verified by the existing test data. Then, the effects of shear span ratio and vertical reinforcement ratio on the mechanical properties of RC shear walls with different structure sizes were studied by using this method. The results show that: 1) The failure mode of shear walls changes from shear failure to bending failure with the increase of the shear span ratio. 2) With the increase of the shear span ratio, the shear capacity of the shear wall decreases and the ductility increases, which leads to the weakening of the size effect. 3) The increase of the vertical reinforcement ratio has a slight increase in the shear capacity of the shear wall, but has almost no effect on the ductility and size effect. In addition, based on the established size effect law which can reflect the quantitative effect of horizontal reinforcement ratio and axial compression ratio, a new size effect law for RC shear wall was proposed considering the quantitative effect of shear span ratio.