Experimental verification of strut and tie model for HSC deep beams without shear reinforcement

2016 ◽  
Vol 117 ◽  
pp. 71-85 ◽  
Author(s):  
Ahmed B. Shuraim ◽  
Ahmed K. El-Sayed
Keyword(s):  
Experimental Verification ◽  
Shear Reinforcement ◽  
Deep Beams ◽  
Strut And Tie ◽  
Strut And Tie Model

Study on Mechanical Behaviors and Calculation of Shear Strength of Steel Truss Reinforced Concrete Deep Beams

2011 ◽  
Vol 243-249 ◽  
pp. 514-520
Author(s):  
Chun Yang ◽  
Ming Ji He ◽  
Jian Cai ◽  
Yan Sheng Huang ◽  
Yi Wu
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Experimental Investigations ◽  
Deep Beam ◽  
Deep Beams ◽  
Steel Reinforced Concrete ◽  
Strut And Tie ◽  
Steel Truss ◽  
Mechanical Performances ◽  
Strut And Tie Model

Based on strut-and-tie model (STM) in deep beams, steel truss reinforced concrete (STRC) deep beam was developed. Experimental investigations of mechanical performances of STRC deep beams were carried out, and results show that STRC deep beam is of high ultimate bearing capacity, large rigidity and good ductility; Strut-and-tie force transference model is formed in STRC deep beams, and loads can be transferred in the shortest and direct way. Then Steel reinforced concrete (SRC) strut-and-tie model (SSTM) for determining the shear strength of STRC deep beams is proposed. The contribution of SRC diagonal strut, longitudinal reinforcements, stirrups and web reinforcements to the shear strength of STRC deep beams are determined with consideration of softened effects of concrete, and for safe consideration, superposition theory is employed for SRC struts. Computer programs are developed to calculate the shear strength of STRC deep beams and verified by experimental results.

scholarly journals Composite Strut and Tie Model for Reinforced Concrete Deep Beams

2009 ◽  
Vol 7 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Kil-Hee Kim ◽  
Woo-Bum Kim ◽  
Jin-Man Kim ◽  
Sang-Woo Kim
Keyword(s):  
Reinforced Concrete ◽  
Deep Beams ◽  
Strut And Tie ◽  
Strut And Tie Model

scholarly journals Study on an Optimal Strut-And-Tie Model for Concrete Deep Beams

2019 ◽  
Vol 9 (17) ◽  
pp. 3637
Author(s):  
Haitao Chen ◽  
Lai Wang ◽  
Jitao Zhong
Keyword(s):  
Carrying Capacity ◽  
Engineering Application ◽  
Load Carrying Capacity ◽  
Deep Beam ◽  
Structural Members ◽  
Deep Beams ◽  
Strut And Tie ◽  
Load Carrying ◽  
Strut And Tie Model ◽  
Reinforcement Design

The optimal strut-and-tie models (STMs) of two typical irregular concrete deep beams were constructed using evolutionary structural optimization and compared with those of previous studies. The reinforced concrete deep beam specimens were cast according to the reinforcement designs guided by different STMs. Eight irregular concrete deep beam specimens were experimentally investigated under stepped loading, and the differences in the amount of steel used, the load-carrying capacity, and the failure pattern of the different specimens were analyzed. The results show that the optimal STMs proposed in this study have significant advantages in terms of cost-effectiveness and can simultaneously ensure the load-carrying capacity, delay the crack propagation of irregular concrete deep beams, and reduce the amount of steel used in structural members. Therefore, they have an important engineering application value for the reinforcement design of irregular concrete deep beams.

A Method to Predict the Punching Shear Strength of Flat Slabs with Shear Reinforcement Using a Strut-and-Tie Model

2017 ◽  
Vol 738 ◽  
pp. 25-35
Author(s):  
Lukáš Lyčka ◽  
Petr Štěpánek
Keyword(s):  
Shear Failure ◽  
Complex Problem ◽  
Punching Shear ◽  
Shear Reinforcement ◽  
Model Code ◽  
Strut And Tie ◽  
Flat Slabs ◽  
Model Code 2010 ◽  
Strut And Tie Model ◽  
Critical Aspects

The use of flat slabs in constructions due to its many functional and economic advantages is wide-spread. Behavior of flat slabs in shear and flexure is a fairly complex problem. Therefore, the punching shear failure belongs to one of the most critical aspects in the design of concrete buildings.The purpose of this paper is to describe a framework of the proposed method for predicting the punching shear of flat slabs with shear reinforcement. Most of the current codes in force are mainly based on empirical formulation. The proposed method is based on a strut-and-tie model and therefore could be considered as an analytical approach. For the purpose of demonstrating the effectiveness of the proposed method, the method is compared with some of the main methods currently in use, such as Eurocode EC2, ACI 318 and Model Code 2010. The comparison consists of results of more than 90 experiments on flat slabs with shear reinforcement, gathered from publications from all around the world.

Shear Behavior of Reinforced Concrete Deep Beams with Various Horizontal to Vertical Reinforcements and Shear Span-to-Effective Depth Ratios

2014 ◽  
Vol 931-932 ◽  
pp. 473-477
Author(s):  
Prach Amornpinnyo ◽  
Jaruek Teerawong
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Beam Specimen ◽  
Test Results ◽  
Deep Beams ◽  
Shear Span ◽  
Strut And Tie ◽  
Vertical Reinforcement ◽  
Effective Depth ◽  
Strut And Tie Model

This paper presents the test results on the shear behavior of reinforced concrete deep beams with six steel reinforcement configurations. They were designed in accordance with the method given in the ACI 318-11. The specimens were subjected to the single concentrated loading at mid-span. The horizontal to vertical reinforcement ratios and shear span-to-effective depth ratios were the variables studied. The shear span-to-effective depth ratios of the beam specimen were between 1.5 to 2.0. The strut-and-tie model was used for the analysis. The test results indicated that the first diagonal cracking load and the failure mode were controlled by the horizontal to vertical reinforcement ratios and the shear span-to-depth ratios. The tests consistently gave the strength values slightly less than those calculated by using the ACI model. A modified ACI model for strut-and-tie was thus proposed and was found to accurately fit the experimental results.

Design of shear reinforcement for thick plates using a strut-and-tie model

2010 ◽  
Vol 37 (2) ◽  
pp. 181-194 ◽  
Author(s):  
H. Marzouk ◽  
E. Rizk ◽  
R. Tiller
Keyword(s):  
Shear Failure ◽  
Punching Shear ◽  
Shear Behaviour ◽  
Rational Approach ◽  
Concrete Slabs ◽  
Shear Reinforcement ◽  
Lower Section ◽  
Strut And Tie ◽  
Shear Cracking ◽  
Strut And Tie Model

The strut-and-tie method is a rational approach to structural concrete design that results in a uniform and consistent design philosophy. A strut-and-tie model has been developed to model the punching-shear behaviour of thick concrete plates. This model provides a quick and simple approach to check the punching-shear behaviour. Thick concrete slabs (250–500 mm) without shear reinforcement can exhibit brittle shear failure under a central force and an unbalanced moment. Shear reinforcement has proven to be very effective in preventing such failures. The developed strut-and-tie model has also been used to evaluate the minimum shear reinforcement required to prevent brittle shear failure of two-way slabs in the vicinity of concentrated loads. The strut-and-tie model for symmetric punching consists of a “bottle-shaped” compressive zone in the upper section of the slab depth, leading to a “rectangular-stress” compressive zone in the lower section of the slab depth. Inclined shear cracking develops in the bottle-shaped zone prior to failure in the lower zone. Cracking in the bottle-shaped zone is related to the splitting tensile strength of concrete.

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