Effect of opening size and location on punching shear behaviour of two-way RC slabs

2014 ◽  
Vol 66 (18) ◽  
pp. 955-966 ◽  
Author(s):  
Özgür Anil ◽  
Tolga Kina ◽  
Vahed Salmani
Keyword(s):  
Punching Shear ◽  
Shear Behaviour ◽  
Rc Slabs

Experimental investigation of edge restraint on punching shear behaviour of RC slabs

2009 ◽  
Vol 2 (1) ◽  
pp. 35-46 ◽  
Author(s):  
A. K.M. Jahangir Alam ◽  
Khan Mahmud Amanat ◽  
Salek M. Seraj
Keyword(s):  
Experimental Investigation ◽  
Punching Shear ◽  
Shear Behaviour ◽  
Rc Slabs

Critical shear crack theory-based punching shear model for FRP-reinforced concrete slabs

2020 ◽  
pp. 136943322097814
Author(s):  
Xing-lang Fan ◽  
Sheng-jie Gu ◽  
Xi Wu ◽  
Jia-fei Jiang
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Shear Crack ◽  
Concrete Strength ◽  
Weight Ratio ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Crack Theory ◽  
Reinforced Concrete Slabs ◽  
Rc Slabs

Owing to their high strength-to-weight ratio, superior corrosion resistance, and convenience in manufacture, fiber-reinforced polymer (FRP) bars can be used as a good alternative to steel bars to solve the durability issue in reinforced concrete (RC) structures, especially for seawater sea-sand concrete. In this paper, a theoretical model for predicting the punching shear strength of FRP-RC slabs is developed. In this model, the punching shear strength is determined by the intersection of capacity and demanding curve of FRP-RC slabs. The capacity curve is employed based on critical shear crack theory, while the demand curve is derived with the help of a simplified tri-linear moment-curvature relationship. After the validity of the proposed model is verified with experimental data collected from the literature, the effects of concrete strength, loading area, FRP reinforcement ratio, and effective depth of concrete slabs are evaluated quantitatively.

Opening effect on punching shear strength of RC slabs

2017 ◽  
Author(s):  
Georgios Balomenos ◽  
Aikaterini Genikomsou ◽  
Marianna Polak
Keyword(s):  
Shear Strength ◽  
Punching Shear ◽  
Rc Slabs

scholarly journals An Analytical and Numerical Investigation on Punching Shear Behaviour of SCC Slab

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
V. Kavinkumar ◽  
R. Elangovan
Keyword(s):  
Shear Stress ◽  
Shear Failure ◽  
Shear Capacity ◽  
Punching Shear ◽  
Shear Behaviour ◽  
Slab Thickness ◽  
Failure Zone ◽  
Self Compacting Concrete ◽  
Concentrated Load ◽  
Different Thickness

<div><p><em>This research is to study the mechanical properties of Self Compacting Concrete (SCC) as well as punching shear failure of SCC slabs. Self compacting concrete was first invited in 1988 to achieve durable concrete structures .Design of Reinforced concrete slab is often compromised by their ability to resist shear stress at punching shear surface area. The connection between slabs and supporting columns could be susceptible to high shear stress and might cause sudden and brittle failure. Punching shear failure takes the form of truncated pyramid shape. This program includes investigating the effect of SCC, slab thickness on the punching shear behaviour in terms of load-deflection response and ultimate failure load, failure characteristic of punching shear failure (shape of failure zone and size of failure zone) of simply supported slabs of 1000 x 1000 x 50 and 75mm under concentrated load at centre of slab. The slabs are made with both SCC and Conventional concrete (CC). Investigation included two way specimens with different thickness to evaluate the performance of specimen with different thickness and the effect of thickness on punching shear capacity and performance</em>.</p></div>

Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Donia Salman ◽  
Rabab Allouzi ◽  
Nasim Shatarat
Keyword(s):  
Structural Engineering ◽  
Experimental Tests ◽  
Shear Capacity ◽  
Punching Shear ◽  
Shear Behaviour ◽  
Cross Sectional ◽  
Content Type ◽  
Flat Slabs ◽  
Reinforced Concrete Slabs ◽  
Rectangular Columns

PurposeThe main goal is to investigate the effect of size and location of opening and column size on the punching shear strength. Openings are often needed in order to install mechanical and electrical services. This process takes away part of the concrete volume which is responsible for resisting the shear forces and any unbalanced moment. Furthermore, the application of rectangular columns in flat slabs is commonly used in practice as they provide lateral stiffness to the building. They are also utilised in garages and multi-storey buildings where these elongated cross-sectional columns reduce the effective span length between adjacent columns.Design/methodology/approachThis research is a numerical-based investigation that is calibrated based on a thirteen previously tested and numerically calibrated slab specimens with no openings. A parametric study is conducted in this study to consider the effect of other parameters, which are the size and location of opening and the rectangularity ratio of column in order to evaluate their effect on the punching shear capacity. A total of 156 models are developed to study these factors. Additionally, the predicted shear carrying capacity of the simulated slabs is calculated using the ACI318–19 and Eurocode (EC2-04) equation.FindingsThe presence of openings reduced the punching shear capacity. The small opening's location and orientation have almost no effect except for one slab. For slabs of large openings, the presence of openings reduced the punching capacity. The punching capacity is higher when the openings are farther from the column. The numerically obtained results of slabs with rectangular columns show lower punching capacity compared to slabs of squared columns with the same length of the punching shear control perimeter. The punching capacity for all slabs is predicted by ACI318–19 and Eurocode (EC2-04) and it is found that Eurocode (EC2-04) provided a closer estimation.Originality/valueThe slabs considered for calibration were reinforced with four different punching shear reinforcement configurations, namely; ordinary closed rectangular stirrups, rectangular spiral stirrups, advanced rectangular spiral stirrups and circular spiral. Generally, there has been limited research on concrete flat slabs with openings in comparison with other subjects related to structural engineering (Guan, 2009) and no research on punching shear with openings of slabs reinforced with these reinforcement schemes. The available research focussed on the effects of openings on the flexural behaviour of reinforced concrete slabs includes Casadei et al. (2003), Banu et al. (2012) and Elsayed et al. (2009). In addition, experimental tests that examined slabs supported on rectangular columns are very limited.

Punching shear behaviour of shear reinforced concrete slabs

2015 ◽  
Vol 168 (6) ◽  
pp. 402-420 ◽  
Author(s):  
Kyoung-Kyu Choi ◽  
Gia Toai Truong ◽  
Seon-Du Kim ◽  
In-Rak Choi
Keyword(s):  
Reinforced Concrete ◽  
Punching Shear ◽  
Shear Behaviour ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs

03.27: Punching shear behaviour of an innovative connection between steel tubular column to flat concrete slab

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 721-728
Author(s):  
Yongchang Wang ◽  
Junlong Yu
Keyword(s):  
Concrete Slab ◽  
Punching Shear ◽  
Shear Behaviour
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