Abstract
This paper presents the results of three flat slab specimens with varying flexural reinforcement ratio tested under constant gravity load and reversed horizontal cyclic loading. The tests are a continuation of the experimental work conducted at FCT/UNL during the last years on specimens with the same overall geometry (4.15 × 1.85 × 0.15 m3) and test setup. In contrast to past tests, in which all the specimens were reinforced with a nearly 1% flexural reinforcement ratio, the new specimens presented herein have a flexural reinforcement ratio varying from 0.64% (two specimens) to 1.34% (one specimen). One of the specimens with low flexural reinforcement ratio was also reinforced with headed studs whereas the other two specimens had no punching shear reinforcement. The magnitude of the gravity loads was chosen such that the ratio between the gravity load and the concentric punching shear resistance remained comparable to that of previously tested specimens at FCT/UNL: around 50%. It is shown that the presence of headed studs leads to a significant improvement of the displacement capacity of slab-column connections, as it was previously observed in tests on specimens with 1% flexural reinforcement ratio. The drift capacity of specimens without punching shear reinforcement was significantly lower.
Original language | English |
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Title of host publication | Concrete Structures: New Trends for Eco-Efficiency and Performance |
Subtitle of host publication | Proceedings of fib symposium 2021 |
Editors | Eduardo Júlio, Jónatas Valença, Ana Sofia Louro |
Place of Publication | Lisboa |
Publisher | fib. The International Federation for Structural Concrete |
Pages | 987-994 |
Number of pages | 8 |
ISBN (Print) | 978-294064308-0 |
Publication status | Published - 2021 |
Event | 2021 fib Symposium of Concrete Structures: New Trends for Eco-Efficiency and Performance - Virtual, Lisbon, Portugal Duration: 14 Jun 2021 → 16 Jun 2021 |
Conference
Conference | 2021 fib Symposium of Concrete Structures: New Trends for Eco-Efficiency and Performance |
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Country/Territory | Portugal |
City | Virtual, Lisbon |
Period | 14/06/21 → 16/06/21 |
Keywords
- Cyclic loading
- Flat slab
- Flexural reinforcement
- Punching
- Seismic behavior