Abstract
Precast hollow-core slabs (PHSs) are widely used in precast construction due to their relatively low dead weight and easy assemblage. Cast-in-place topping concrete (TC) is utilized to obtain composite sections and to enhance in-plane stiffness of the slab system. Shear transfer between the layers of a composite slab can be provided by the upper face roughness of PHS. However, the roughening process may not be preferred in some plants. This paper evaluates the efficiency of Z-type shear connectors applied in the interface between PHS and TC. Three dissimilar interface conditions (i.e., Z-reinforced, smooth and rough) were studied experimentally in full-scale specimens. Push-off loading was applied to evaluate the interface shear transfer capability of the specimens, and Z-type shear connectors were found to be the most effective when they are applied at each joint between PHSs. The achievements of some code equations to assess interface shear strength were also investigated, and an alteration for the interface shear capacity equation of ACI 318M is proposed.
| Original language | English |
|---|---|
| Article number | 110563 |
| Journal | Engineering Structures |
| Volume | 214 |
| DOIs | |
| Publication status | Published - 1 Jul 2020 |
Bibliographical note
Publisher Copyright:© 2020 Elsevier Ltd
Funding
This study was conducted in the framework of İTÜNOVA Technology Transfer Office Research Project titled “Evaluation of Interaction Between Hollow Core Slab and Topping Concrete”. The financial support provided by Turkish Precast Concrete Association through this project is greatly appreciated. The specimens were produced by Yapı Merkezi Prefabrikasyon A.Ş. and PB Prefabrik A.Ş. The study was conducted at the Structural and Earthquake Engineering Laboratory (STEELab) of Istanbul Technical University. Support from laboratory staff and the valuable contributions of Mr. Günkut Barka and Mr. Hakan Ataköy are gratefully acknowledged. This study was conducted in the framework of ?T?NOVA Technology Transfer Office Research Project titled ?Evaluation of Interaction Between Hollow Core Slab and Topping Concrete?. The financial support provided by Turkish Precast Concrete Association through this project is greatly appreciated. The specimens were produced by Yap? Merkezi Prefabrikasyon A.?. and PB Prefabrik A.?. The study was conducted at the Structural and Earthquake Engineering Laboratory (STEELab) of Istanbul Technical University. Support from laboratory staff and the valuable contributions of Mr. G?nkut Barka and Mr. Hakan Atak?y are gratefully acknowledged.
| Funders | Funder number |
|---|---|
| Turkish Precast Concrete Association | |
| Istanbul Teknik Üniversitesi |
Keywords
- Bonding
- Interface shear strength
- Precast hollow-core slab
- Topping concrete