Title: Assessing of the punching capability of developed slab-column connections in precast concrete flat slabs

Authors: Ahmed A. Nasr; Yehia A. Hussein; Nabil A.B. Yehia; Khaled F. El-Kashif

Addresses: State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China; Construction Research Institute, National Water Research Center, Cairo, Egypt ' Institute of Concrete Structures, Housing and Building Research Center, Cairo, Egypt ' Department of Concrete Structures, Faculty of Engineering, Cairo University, Egypt ' Department of Concrete Structures, Faculty of Engineering, Cairo University, Egypt

Abstract: Punching capacity and failure behaviour of developed slab-column connections of precast concrete structures are investigated in this work. The experiments were implemented on the interior column of a residential flat slab, using four connections of full scale compared to the prototype connection. The configuration and erection methods are regarded the most important parameters, as they are classified as concrete corbel, steel corbel, dowels, Indo, and prototype. The results revealed that, the ultimate loads attained by the concrete corbel connection, steel corbel connection, and dowels connection exceeded the load attained by the prototype connection. Furthermore, increasing the axial loading area increases punching failure resistance and load capacity. Additionally, the steel reinforcement is essential since it participates in punching opposition. Lastly, it was reached that dowels and concrete corbel connections can be used for only one story, while the steel bracket, and Indo connections can be utilised on multiple slab floors.

Keywords: punching shear; load capacity; precast concrete structures; slab column connection; flat slab.

DOI: 10.1504/IJSTRUCTE.2024.138114

International Journal of Structural Engineering, 2024 Vol.14 No.2, pp.141 - 163

Received: 06 Aug 2023
Accepted: 27 Dec 2023
Published online: 29 Apr 2024 *

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