Neural network-based formula for shear capacity prediction of one-way slabs under concentrated loads

Concentrated Load ◽

To Come ◽

Artificial Neural Network Ann ◽

Relative Errors

According to the current codes and guidelines, shear assessment of existing reinforced concrete slab bridges sometimes leads to the conclusion that the bridge under consideration has insufficient shear capacity. The calculated shear capacity, however, does not consider the transverse redistribution capacity of slabs, thus leading to overconservative values. This paper proposes an artificial neural network (ANN)-based formula to come up with estimates of the shear capacity of one-way reinforced concrete slabs under a concentrated load, based on 287 test results gathered from the literature. The proposed model yields maximum and mean relative errors of 0.0% for the 287 data points. Moreover, it was illustrated to clearly outperform (mean Vtest / VANN =1.00) the Eurocode 2 provisions (mean VE,EC / VR,c =1.59) for that dataset. A step-by-step assessment scheme for reinforced concrete slab bridges by means of the ANN-based model is also proposed, which results in an improvement of the current assessment procedures.

Neural network-based formula for shear capacity prediction of one-way slabs under concentrated loads

10.36227/techrxiv.12672191 ◽

2020 ◽

Author(s):

Abambres M ◽

Lantsoght E

Keyword(s):

Neural Network ◽

Reinforced Concrete ◽

Concrete Slab ◽

Shear Capacity ◽

Concentrated Load ◽

To Come ◽

Artificial Neural Network Ann ◽

Relative Errors

According to the current codes and guidelines, shear assessment of existing reinforced concrete slab bridges sometimes leads to the conclusion that the bridge under consideration has insufficient shear capacity. The calculated shear capacity, however, does not consider the transverse redistribution capacity of slabs, thus leading to overconservative values. This paper proposes an artificial neural network (ANN)-based formula to come up with estimates of the shear capacity of one-way reinforced concrete slabs under a concentrated load, based on 287 test results gathered from the literature. The proposed model yields maximum and mean relative errors of 0.0% for the 287 data points. Moreover, it was illustrated to clearly outperform (mean Vtest / VANN =1.00) the Eurocode 2 provisions (mean VE,EC / VR,c =1.59) for that dataset. A step-by-step assessment scheme for reinforced concrete slab bridges by means of the ANN-based model is also proposed, which results in an improvement of the current assessment procedures.

Neural network-based formula for shear capacity prediction of one-way slabs under concentrated loads

10.36227/techrxiv.12672191.v1 ◽

2020 ◽

Author(s):

Abambres M ◽

Lantsoght E

Keyword(s):

Neural Network ◽

Reinforced Concrete ◽

Concrete Slab ◽

Shear Capacity ◽

Concentrated Load ◽

To Come ◽

Artificial Neural Network Ann ◽

Relative Errors

According to the current codes and guidelines, shear assessment of existing reinforced concrete slab bridges sometimes leads to the conclusion that the bridge under consideration has insufficient shear capacity. The calculated shear capacity, however, does not consider the transverse redistribution capacity of slabs, thus leading to overconservative values. This paper proposes an artificial neural network (ANN)-based formula to come up with estimates of the shear capacity of one-way reinforced concrete slabs under a concentrated load, based on 287 test results gathered from the literature. The proposed model yields maximum and mean relative errors of 0.0% for the 287 data points. Moreover, it was illustrated to clearly outperform (mean Vtest / VANN =1.00) the Eurocode 2 provisions (mean VE,EC / VR,c =1.59) for that dataset. A step-by-step assessment scheme for reinforced concrete slab bridges by means of the ANN-based model is also proposed, which results in an improvement of the current assessment procedures.

Investigation on Structural Behavior of Bamboo Reinforced Concrete Slabs under Concentrated Load

Sains Malaysiana ◽

10.17576/jsm-2021-5001-22 ◽

2021 ◽

Vol 50 (1) ◽

pp. 227-238

Author(s):

Yanuar Haryanto ◽

Nanang Gunawan Wariyatno ◽

Hsuan-Teh Hu ◽

Ay Lie Han ◽

Banu Ardi Hidayat

Keyword(s):

Reinforced Concrete ◽

Concrete Slab ◽

Absorption Capacity ◽

Concrete Slabs ◽

Structural Behaviour ◽

Concentrated Load ◽

Steel Reinforced Concrete ◽

Cracking Pattern

Reinforced concrete is perhaps the most widely used building material in the world. However, the materials used for reinforcement of concrete i.e. steel is quite expensive and scarcely available in the developing world. As a result, bamboo is considered to be a cheaper replacement with high tensile strength. This research investigated the structural behaviour of bamboo-reinforced concrete slabs used for footplate foundation subjected to concentrated load. For this purpose, four different reinforced concrete slab panels were developed and analyzed. The influence of replacing steel with bamboo for the reinforcement of concrete slabs on their structural behaviour was assessed by determining the load-deflection characteristics, the ultimate load, the stiffness, the ductility, the cracking pattern, and the energy absorption capacity. The results showed that in comparison to steel reinforced concrete slabs, the strength of 82% can be acquired by the bamboo reinforced slabs. Furthermore, ductility demonstrated by the two types of specimens was almost equivalent i.e. up to 93%. Those indicated that the structural behaviour demonstrated by bamboo reinforced slabs is quite comparable to that of steel reinforced concrete slabs. Therefore, bamboo can prove to be a promising substitute for steel in concrete reinforcement. Future studies may further examine this opportunity.

Enhancing the Punching Load Capacity of Reinforced Concrete Slabs Using an External Epoxy-Steel Wire Mesh Composite

Fibers ◽

10.3390/fib7080068 ◽

2019 ◽

Vol 7 (8) ◽

pp. 68

Author(s):

Abdulkhaliq A. Jaafer ◽

Raid AL-Shadidi ◽

Saba L. Kareem

Keyword(s):

Reinforced Concrete ◽

Concrete Slab ◽

Load Capacity ◽

Steel Wire ◽

Wire Mesh ◽

Concrete Slabs ◽

Concentrated Load ◽

Steel Wire Mesh

The present experimental work investigates the applicability and performance of a new strengthening method for concrete slabs, intended to increase their punching resistance using combination layers of steel wire mesh with epoxy attached to the concrete slabs’ tension face. Six simply supported square reinforced concrete slab specimens were tested up to failure under a central concentrated load. The main parameters in the study are the concrete compressive strength (30 MPa and 65 MPa) and the configuration of a bundle externally fixed to the tension side of the tested slabs. The experimental results appeared to greatly enhance the performance of the specimens, as they were externally strengthenined under this new method. When compared to the control slabs, the punching load and stiffness of the strengthened slabs increased up to 28% and 21%, respectively.

Experimental and Theoretical Behavior of Reinforced Concrete Two Way Slabs Strengthened by Steel Fiber Ferrocement Layers at Tension Zone

Journal of University of Babylon for Engineering Sciences ◽

10.29196/jub.v26i3.658 ◽

2018 ◽

Vol 26 (3) ◽

pp. 199-211 ◽

Cited By ~ 1

Author(s):

Mazen D. Abdullah

Keyword(s):

Compressive Strength ◽

Reinforced Concrete ◽

Steel Fiber ◽

Concrete Slab ◽

Experimental Results ◽

Wire Mesh ◽

Concentrated Load ◽

Simply Supported ◽

Reinforced Concrete Slabs

An experimental and analytical behavior of strengthened reinforced concrete two way slabs by steel fiber ferrocement layers ,this study included testing 14 simply supported two way slabs, which include 1 control slab, 13 strengthened slabs. In the strengthened slabs the effect of the ferrocement layers with; steel fiber content in the ferrocement mortar of (0.25,0.5,0.75.1.1.25%), thickness of ferrocement layers, the compressive strength for ferrocement mortar and wire mesh layers number of ferrocement was investigated. The mid span deflection at ultimate load and cracks pattern were discussed. All the reinforced concrete slab specimens were designed of the same dimensions and reinforced identically to fail in flexure. Simply supported conditions for all slabs has bean tested under central concentrated load. The experimental results show that; the ultimate loads and mid span deflection of strengthened reinforced concrete slabs were more effected by using the steel fiber on the ferrocement mortar, increasing the thickness of ferrocement and the compressive strength of ferrocement. Three-dimensional nonlinear finite element analysis has been used to conduct the analytical investigation, ANSYS (Version 16.0) computer program was used in this study. The analytical result from modeling in ANSYS program exhibited a good agreement with experimental results.

Analysis on Punching Shear Behavior of the Raft Slab Reinforced with Steel Fibers

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.400-402.335 ◽

2008 ◽

Vol 400-402 ◽

pp. 335-340

Author(s):

Xiao Wei Wang ◽

Wen Ling Tian ◽

Zhi Yuan Huang ◽

Ming Jie Zhou ◽

Xiao Yan Zhao

Keyword(s):

Reinforced Concrete ◽

Concrete Slab ◽

Shear Behavior ◽

Shear Capacity ◽

Steel Fibers ◽

Punching Shear ◽

Concrete Slabs ◽

Mass Concrete ◽

The Common

The thickness of the raft slab is determined by punching shear. The raft slab is commonly thick, which causes concrete volume is large. Mass concrete can bring disadvantage to the foundation. In order to increase the bearing capacity and reduce the thickness, it is suggested that the raft slab to be reinforced by steel fibers. There are five groups of specimens in this paper. S1 is the common reinforced concrete slab. S2 and S3 are concrete slabs reinforced by steel fibers broadcasted layer by layer when casting specimen. S4 and S5 are concrete slabs reinforced by steel fibers mixed homogeneously when making concrete. The punching shear tests of these slabs were done. The test results indicate that the punching shear capacity of the slab reinforced with steel fibers is higher than that of concrete slab, the stiffness and crack resistance of the steel fibers reinforced concrete slab are better than those of the common concrete slab and the punching shear of the slabs with different construction methods of steel fibers is similar. It analyses the punching shear behavior of the slab reinforced with steel fibers and suggests the ultimate bearing formula. The calculative values are coincided with the measured values well.

Numerical Analysis of Anti-Impact Performances of the Reinforced Concrete Slab

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.249-250.1063 ◽

2012 ◽

Vol 249-250 ◽

pp. 1063-1068

Author(s):

Qian Ma ◽

Dan Wu ◽

Xu Dong Shi ◽

Xiu Gen Jiang

Keyword(s):

Reinforced Concrete ◽

Concrete Slab ◽

Concrete Strength ◽

Impact Resistance ◽

Steel Bar ◽

Parameterized Modeling ◽

Element Theory ◽

Bar Diameter

The influence of the structure parameters on the anti-impact performances of the reinforced concrete slab is studied in the article. The reinforced concrete model is established by using ANSYS 13.0/LS-DYNA and nonlinear finite element theory and the parameterized modeling is achieved. The results show that the increase of the thickness of the slab and the steel bar diameter result in the enhancement of impact resistant capability of the slab; a appropriate quantity of reinforcement is significant; Increasing the concrete strength has a distinct impact on the slab’s impact resistance when using relatively low strength concrete. However the influence becomes weak after the concrete strength comes to C60 and higher. The fruits are useful to the designing of reinforced concrete slabs.

Critical Review of Design Procedures for Reinforced Concrete Slabs as per IRC 112-2011

Materials Science Forum ◽

10.4028/www.scientific.net/msf.969.349 ◽

2019 ◽

Vol 969 ◽

pp. 349-354 ◽

Cited By ~ 1

Author(s):

J. Chithra ◽

Praveen Nagarajan ◽

A.S. Sajith ◽

R.A. Roshan

Keyword(s):

Reinforced Concrete ◽

Critical Review ◽

Concrete Slab ◽

Concrete Slabs ◽

Finite Element Software ◽

Distributed Load ◽

Uniformly Distributed Load ◽

Sandwich Model

Nowadays finite element software is used for the design and analysis of reinforced concrete slabs. This paper intends to have a critical review based on a comparison study between the three design methods and to estimate the amount of reinforcement to be provided in each case. The three methods discussed are; the three-layer sandwich model (IRC 112-2011), Wood Armer method (EN1992-1-1:2004) and the conventional design method as per IS 456-2000. In the recently revised code for bridges IRC 112-2011, there is a recommendation to adopt three-layer sandwich model for the design of reinforced concrete slab. In this paper, a critical review of this method is done, and it is used for slabs subjected to uniformly distributed load. This method is illustrated by considering the design of rectangular slab subjected to uniformly distributed load. The results of this method are compared with the results obtained using Wood Armer method and using the moment coefficients suggested in IS 456-2000.