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Shear behaviour of hollow precast concrete-composite structures
https://orcid.org/http://orcid.org/0000-0002-9446-5436
Hollow core concrete-panels are prone to shear failure due to collapse of the voids. In this study, the shear behaviour of hollow precast concrete-composite structures (HPCCSs) reinforced with steel bars and composite reinforcing system (CRS) were investigated. Eleven concrete-panels with different unit-widths (175 mm, 200 mm and 300 mm) and shear-spans (300 mm, 600 mm and 900 mm) were fabricated and tested under static-bending to investigate the effect of CRS spacing and span-to-depth (a/d) ratio, respectively on the shear behaviour of the HPCCSs. It was found that the CRS enhanced the structural performance of HPCCSs by changing the shear crack path. The narrower CRS spacing provided better interaction between the CRS and the concrete as the flanges interlock better with most of the surrounding concrete, and exhibited higher normalised shear strength than the wider spacing panels. The contribution of CRS in shear was constant but increased in bending with the increase of a/d ratio. The finite-element-analysis confirmed that the CRS contributed highly in resisting the shear of the HPCCSs. Finally, empirical model was developed to predict shear load-capacity by considering the contribution of the CRS and a/d ratio of this new type of HPCCSs.
Shear behaviour of hollow precast concrete-composite structures
https://orcid.org/http://orcid.org/0000-0002-9446-5436
Hollow core concrete-panels are prone to shear failure due to collapse of the voids. In this study, the shear behaviour of hollow precast concrete-composite structures (HPCCSs) reinforced with steel bars and composite reinforcing system (CRS) were investigated. Eleven concrete-panels with different unit-widths (175 mm, 200 mm and 300 mm) and shear-spans (300 mm, 600 mm and 900 mm) were fabricated and tested under static-bending to investigate the effect of CRS spacing and span-to-depth (a/d) ratio, respectively on the shear behaviour of the HPCCSs. It was found that the CRS enhanced the structural performance of HPCCSs by changing the shear crack path. The narrower CRS spacing provided better interaction between the CRS and the concrete as the flanges interlock better with most of the surrounding concrete, and exhibited higher normalised shear strength than the wider spacing panels. The contribution of CRS in shear was constant but increased in bending with the increase of a/d ratio. The finite-element-analysis confirmed that the CRS contributed highly in resisting the shear of the HPCCSs. Finally, empirical model was developed to predict shear load-capacity by considering the contribution of the CRS and a/d ratio of this new type of HPCCSs.
Shear behaviour of hollow precast concrete-composite structures
https://orcid.org/http://orcid.org/0000-0002-9446-5436
Hollow core concrete-panels are prone to shear failure due to collapse of the voids. In this study, the shear behaviour of hollow precast concrete-composite structures (HPCCSs) reinforced with steel bars and composite reinforcing system (CRS) were investigated. Eleven concrete-panels with different unit-widths (175 mm, 200 mm and 300 mm) and shear-spans (300 mm, 600 mm and 900 mm) were fabricated and tested under static-bending to investigate the effect of CRS spacing and span-to-depth (a/d) ratio, respectively on the shear behaviour of the HPCCSs. It was found that the CRS enhanced the structural performance of HPCCSs by changing the shear crack path. The narrower CRS spacing provided better interaction between the CRS and the concrete as the flanges interlock better with most of the surrounding concrete, and exhibited higher normalised shear strength than the wider spacing panels. The contribution of CRS in shear was constant but increased in bending with the increase of a/d ratio. The finite-element-analysis confirmed that the CRS contributed highly in resisting the shear of the HPCCSs. Finally, empirical model was developed to predict shear load-capacity by considering the contribution of the CRS and a/d ratio of this new type of HPCCSs.
Shear behaviour of hollow precast concrete-composite structures
Mater Struct
Al-Fakher, Usama (author) / Manalo, Allan (author) / Ferdous, Wahid (author) / Alajarmeh, Omar (author) / Aravinthan, Thiru (author) / Zhuge, Yan (author) / Bai, Yu (author) / Edoo, Azam (author)
2021-04-01
Article (Journal)
Electronic Resource
English
Shear behaviour of hollow precast concrete-composite structures
| Online Contents | 2021
Precast concrete hollow blocks
Engineering Index Backfile | 1940