A numerical study on one-way RC slabs strengthened with fibre reinforced cementitious mortar (FRCM)

2022 ◽  
Author(s):  
Ali Hadi Adheem ◽  
Majid M. A. Kadhim ◽  
Akram Jawdhari
Keyword(s):  
Numerical Study ◽  
Rc Slabs

Experimental and Numerical Study of Basalt FRP Strip Strengthened RC Slabs under Impact Loads

2020 ◽  
Vol 20 (06) ◽  
pp. 2040001 ◽  
Author(s):  
Wensu Chen ◽  
Thong M. Pham ◽  
Mohamed Elchalakani ◽  
Huawei Li ◽  
Hong Hao ◽  
...  
Keyword(s):  
Failure Modes ◽  
Shear Failure ◽  
Numerical Study ◽  
Impact Resistance ◽  
Basalt Fiber ◽  
Impact Behavior ◽  
Impact Loads ◽  
Quantitative Measurements ◽  
Rc Slabs ◽  
The Impact

Basalt fiber-reinforced polymer (BFRP) has been applied for strengthening concrete structures. However, studies on reinforced concrete (RC) slabs strengthened by BFRP strips under impact loads are limited in open literature. This study investigates the efficiency of using BFRP strips with various strengthening layouts and anchoring schemes on the impact resistance of RC slabs. A total of 11 two-way square slabs were prepared and tested, including one reference specimen without strengthening and ten slabs strengthened with BFRP strips and/or anchors. The RC slabs were impacted by a drop weight with increasing height until slab failure. The observed failure modes include punching shear failure, BFRP sheet debonding and reinforcement fracture. The failure modes and the effects of using various strengthening schemes on the impact resistant capacity of RC slabs were examined. The quantitative measurements, such as impact velocity, indentation depth and diameter, were compared and discussed. In addition, numerical studies were carried out by using LS-DYNA to simulate the impact tests of RC slabs with and without BFRP strengthening. With the calibrated numerical model, the impact behavior of slabs with various dimensions and strengthening layouts under different impact intensities can be predicted with good accuracy.

Experimental and numerical study of the behavior of RC slabs with openings reinforced by metal mesh under impact loading

2018 ◽  
Vol 9 (2) ◽  
pp. 37
Author(s):  
Yousry B. I. Shaheen ◽  
Ghada Mousa Hekal ◽  
Ahmed Khaled Fadel
Keyword(s):  
Impact Loading ◽  
Impact Load ◽  
Numerical Study ◽  
Fe Model ◽  
Test Results ◽  
Metal Mesh ◽  
Expanded Metal ◽  
Rc Slabs

The main objective of the following work is to inspect the effect of reinforcing metal mesh on the behavior of slabs with openings under impact loadings. Based on an earlier numerical study by Shaheen et al. (2017), slabs with mid-side openings revealed the worst behavior regarding to deflection and cracked pattern when subjected to impact loading compared to other slabs with different locations of openings. Hence, the present work focuses specifically on this type of slabs and the variation in their behavior when reinforced by welded or expanded metal mesh. Seven specimens were prepared and tested in Faculty of Engineering, Menoufia University, Egypt. Moreover, a FE model for the slabs was built using Abaqus 6.14 and verified against test results. It was found that expanded metal mesh had a significant effect on reducing deflection due to impact load as well as controlling of cracks in contrast with welded metal mesh.

scholarly journals Behaviour of RC structures strengthened with prestressed CFRP laminates: a numerical study

2019 ◽  
Author(s):  
José Sena-Cruz ◽  
Luís Correia ◽  
Paulo França
Keyword(s):  
Numerical Study ◽  
Shear Stresses ◽  
Premature Failure ◽  
Rc Structures ◽  
Cfrp Laminate ◽  
Flexural Strengthening ◽  
Cfrp Laminates ◽  
Externally Bonded ◽  
Fibre Reinforced Polymer ◽  
Rc Slabs

<p>The externally bonded reinforcement (EBR) technique is one of the most widely used strategies for the flexural strengthening of reinforced concrete (RC) with fibre reinforced polymer (FRP) materials. The EBR technique offers several structural advantages when the FRP material is prestressed. The development of high shear stresses at the ends of the prestressed FRP material can cause premature FRP peeling-off failure. This premature failure can be delayed or even avoided with the use of special end-anchorage systems, like the mechanical anchorage (MA) system and the gradient anchorage (GA) system. This paper presents an experimental and a numerical study on RC slabs strengthened in flexure with prestressed carbon FRP (CFRP) laminate strips, namely: (i) one reference slab; (ii) one slab strengthened with non- prestressed externally bonded CFRP (EB-CFRP) laminate; (iii, iv) and two slabs strengthened with prestressed EB-CFRP laminates using the MA and GA systems. The performance of these simulations was compared with results of the slabs experimentally tested up to failure. Subsequently, these models were used on a parametric study that intended to investigate the influence of different parameters affecting the behaviour of the slabs strengthened with prestressed EB-CFRP laminates.</p>

scholarly journals Deformation Behavior of Reinforced Concrete Two-Way Slabs Strengthened with Different Widths and Configurations of GFRP

2017 ◽  
Vol 3 (11) ◽  
pp. 1121
Author(s):  
Hossein Izadi ◽  
Hamid Pesaran Behbahani
Keyword(s):  
Reinforced Concrete ◽  
Deformation Behavior ◽  
Numerical Study ◽  
Fiber Reinforced Polymer ◽  
Steel Reinforced Concrete ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Comparison Results ◽  
Rc Slabs ◽  
Strip Length

In this paper, we conducted a numerical analysis of the deformation behavior of Steel-reinforced concrete (RC) two-way slabs strengthened by glass fiber reinforced polymer (GFRP) with different widths and configurations. A total number of 36 RC slabs of  cm were used in this numerical study. Also, a column of  was considered in the center of the slab for applying static loading. The bonded GFRP strips had 5, 7.5 and 10 cm width (W) and configured in three models called PM1, PM2, and DM. In PM1 (strip length = 2.4 m) and PM2 (strip length =1.7 m) configurations, the strips were bonded in two directions parallel to the sides of the slab, while in DM configuration (strip length =1.7 m), strips were rotated with 45 degree angle around the central axis that is perpendicular to the surface of the slab. According to the comparison results, we found out that the 5-cm wide strips with PM1 configuration having a parallel space of 0.5 times the strip width ( ) greatly reduced the deformation of RC two-way slab compared to other strip widths and configurations, while  strips under all configurations, highly increased the deformation when space between strips varied from  to .

Experimental and numerical study on the dynamic response of RC slabs under blast loading

2016 ◽  
Vol 66 ◽  
pp. 120-129 ◽  
Author(s):  
Shujian Yao ◽  
Duo Zhang ◽  
Xuguang Chen ◽  
Fangyun Lu ◽  
Wei Wang
Keyword(s):  
Dynamic Response ◽  
Numerical Study ◽  
Blast Loading ◽  
Rc Slabs

Experimental and numerical study on damage mode of RC slabs under combined blast and fragment loading

2020 ◽  
Vol 142 ◽  
pp. 103579 ◽  
Author(s):  
Ying Li ◽  
Zhaoyue Chen ◽  
Xianben Ren ◽  
Ran Tao ◽  
Ruxin Gao ◽  
...  
Keyword(s):  
Numerical Study ◽  
Damage Mode ◽  
Rc Slabs

Experimental and numerical study of damage characteristics of RC slabs subjected to air and underwater contact explosions

2019 ◽  
Vol 66 ◽  
pp. 242-257 ◽  
Author(s):  
Guangdong Yang ◽  
Gaohui Wang ◽  
Wenbo Lu ◽  
Liang Wu ◽  
Peng Yan ◽  
...  
Keyword(s):  
Numerical Study ◽  
Damage Characteristics ◽  
Rc Slabs

Numerical study and experimental tests on full-scale RC slabs under close-in explosions

2021 ◽  
Vol 231 ◽  
pp. 111774
Author(s):  
R. Castedo ◽  
A.P. Santos ◽  
A. Alañón ◽  
C. Reifarth ◽  
M. Chiquito ◽  
...  
Keyword(s):  
Numerical Study ◽  
Experimental Tests ◽  
Full Scale ◽  
Rc Slabs
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