Shear friction performance between high strength concrete (HSC) and ultra high performance concrete (UHPC) for bridge connection applications

Semendary, Ali A.; Hamid, Waleed K.; Steinberg, Eric P.; Khoury, Issam

doi:10.1016/j.engstruct.2019.110122

Cited by 59 publications

(17 citation statements)

References 4 publications

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“…On the other hand, numerous previous investigations [12][13][14][15] have been achieved to evaluate the performances of structural elements prepared from UHSC. Kimura et al [16] evaluated the behavior of UHSC columns under seismic conditions.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Ultra-High Strength Concrete Beams

Tawfic

Nooman

Amer

2022

Journal of Al-Azhar University Engineering Sector

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In the present investigation, the behavior of ultra-high strength concrete (UHSC) beams containing different reinforcement ratio and stirrups was investigated. The concrete was successfully prepared from Egyptian local materials. Series of cubes and cylinders were prepared to examine the compressive and splitting strengths of the UHSC at different ages. Eight reinforced beams have been prepared and tested at 28 days. The outcomes indicated that the compressive strength ratio between cylinders and cubes samples are 90%, 87% and 85% at 7,28, and 56 days respectively, while the ratio between tensile strength to compressive strength is 38.5% and 36.6% at 7 and 28 days respectively. Furthermore, the beams test outcomes were presented and discussed as deflection, ultimate loads, cracking, failure modes and ductility.

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Section: Introductionmentioning

confidence: 99%

Behavior of Ultra-High Strength Concrete Beams

Tawfic

Nooman

Amer

2022

Journal of Al-Azhar University Engineering Sector

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“…Although several definitions for HPC have been provided, it is generally understood that HPC is concrete that is more durable than conventional concretes (and this includes its increased compressive strength capacity) [17]. For many years, HPC has been employed in the construction of several concrete structures because of its superior features, which include high strength, durability, and efficiency [18,19]. These qualities are often obtained by incorporating SCMs (especially silica fume) into HPC.…”

Section: Introductionmentioning

confidence: 99%

Computation of High-Performance Concrete Compressive Strength Using Standalone and Ensembled Machine Learning Techniques

Ahmad

et al. 2021

Materials

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The current trend in modern research revolves around novel techniques that can predict the characteristics of materials without consuming time, effort, and experimental costs. The adaptation of machine learning techniques to compute the various properties of materials is gaining more attention. This study aims to use both standalone and ensemble machine learning techniques to forecast the 28-day compressive strength of high-performance concrete. One standalone technique (support vector regression (SVR)) and two ensemble techniques (AdaBoost and random forest) were applied for this purpose. To validate the performance of each technique, coefficient of determination (R2), statistical, and k-fold cross-validation checks were used. Additionally, the contribution of input parameters towards the prediction of results was determined by applying sensitivity analysis. It was proven that all the techniques employed showed improved performance in predicting the outcomes. The random forest model was the most accurate, with an R2 value of 0.93, compared to the support vector regression and AdaBoost models, with R2 values of 0.83 and 0.90, respectively. In addition, statistical and k-fold cross-validation checks validated the random forest model as the best performer based on lower error values. However, the prediction performance of the support vector regression and AdaBoost models was also within an acceptable range. This shows that novel machine learning techniques can be used to predict the mechanical properties of high-performance concrete.

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“…The main purpose of horizontal and vertical joints between panels or slabs is the perception of shear forces [14]. Experimental studies are limited to determining the optimal placement of reinforcement in the joints between wall panels, bridge plate joints [15][16][17], as well as issues of concrete work in the joint, issues of adhesion of panel concrete and butt concrete [18]. In addition, the issues of shear strength are also considered in relation to the construction of multi-layer wall panels [19][20][21], data on the flexibility of the reinforcement in the joints, the influence of its position on the nature of the destruction of the joints and the connected panels, the destructive loads are obtained.…”

Section: Introductionmentioning

confidence: 99%

Structural solution of the horizontal joint of floor slabs in girderless frame

Mironova

2021

E3S Web Conf.

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Despite the widespread use of monolithic construction, precast concrete remains in demand in the construction of residential and administrative buildings. Regardless of the advantages in technology and the quality of work, it is necessary and appropriate to modernize the existing design solutions, which allows you to simplify and speed up the technological operations during construction. Moreover, in the construction of complex nodes and joints, the qualification of workers is important, so simplifying the work without losing the quality of construction and ensuring strength, stability and durability is an important task. This problem can be solved by using modern embedded parts in the joints that do not require welding and other complex technological operations. In this paper, a constructive solution of the horizontal joint of the floor slabs located in the zone of action of minimal forces is proposed on the example of a girderless frame. The purpose of the study is to determine the stress-strain state of the proposed structural solution of the horizontal joint of floor slabs using loopshaped embedded parts «PFEIFER» and to develop recommendations for determining the shear compliance. Based on the analysis of the results of numerical modeling, the features of the stress-strain state of the joint during shear operation are revealed. The results obtained can be used in the design of buildings with precast-monolithic ringless frames, in the modernization of existing standard solutions of precast-monolithic frames, as well as other load-bearing systems made of precast concrete.

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Shear friction performance between high strength concrete (HSC) and ultra high performance concrete (UHPC) for bridge connection applications

Cited by 59 publications

References 4 publications

Behavior of Ultra-High Strength Concrete Beams

Behavior of Ultra-High Strength Concrete Beams

Computation of High-Performance Concrete Compressive Strength Using Standalone and Ensembled Machine Learning Techniques

Structural solution of the horizontal joint of floor slabs in girderless frame

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