Effect of post tensioning on strengthening different types of steel frames

Ghannam, Mohamed; Mahmoud, Nabil S.; Badr, Ahmed; Salem, Fikry A.

doi:10.1016/j.jksues.2016.07.001

Cited by 9 publications

(6 citation statements)

References 6 publications

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“…Most of the disadvantages of the method of amplification of pre-stressed elements can be eliminated by rational redistribution (regulation) of the stress-deformed state(SDS) in reinforcement elements and reinforced construction rods (Gogol, 2018;Ghannam et al, 2016;Hohol et al, 2021).…”

Section: Presentation Of the Main Research Materialsmentioning

confidence: 99%

Regulation of Stress-Deformed State in Compressed Elements of Steel Frames

Hohol¹,

Котів²,

Peleshko³

et al. 2021

Theory build. pract.

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The article is devoted to the regulation of the stress-strain state in the compressed elements of steel frames under full operating load. It is proposed to perform reinforcement of such elements with different end eccentricities of load application by rational regulation of the stress-strain state in the reinforcement elements. It is shown that the use of SDS adjustment for frame racks increases their bearing capacity and reduces deformability and welds. The new proposed technology of SDS regulation and possible constructive decisions are offered. Numerical experiment revealed high efficiency of application of the proposed solutions during the reconstruction and reinforcement of the metal frame system. The implementation of the proposed method of SDS regulation confirmed its effectiveness.

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Section: Presentation Of the Main Research Materialsmentioning

confidence: 99%

Regulation of Stress-Deformed State in Compressed Elements of Steel Frames

Hohol¹,

Котів²,

Peleshko³

et al. 2021

Theory build. pract.

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“…Post-tensioned beams have technical and financial advantages over more simply fabricated structures. Studies have examined the use of post-tensioning cables in earthquake-resistant structural steel moment-resisting frames [14][15][16][17]. Nazir [18] applied post-tensioned cables to a bridge with a curved steel beam.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that post-tensioning technology could be extensively used for steel beams due to its low cost and ease of preparation. Ghannam et al [15] studied the effect of post-tensioned cables for strengthening steel frames (simple, double-bay, and double-story frames) using ANSYS finite element (FE) method. The results of the FE models indicated that the use of post-tensioned cables significantly increased the load capacity of the steel frame.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis on the Behavior of Reinforced Industrial Shed Structures with Shape Memory Alloys

2022

IJE

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Shape memory alloys (SMAs) are functional materials that feature shape memory effects and superelasticity. These features have made SMAs efficient materials for reinforcement and improvement of the stability of a structure. The present study investigated the effect of local post-tensioning with SMAs to improve the load-carrying capacity of tapered steel industrial sheds. For this purpose, ABAQUS software was used to predict the flexural strength and load-bearing capacity of the alloys. The effects of the diameter and the post-tension force applied to the SMA tendons were investigated. The results showed that external post-tensioning using SMA tendons is an effective way to increase the loadcarrying capacity of industrial sheds. In the maximum load capacity of the frame for the steel and SMA tendons increased by 36 and 60%, respectively. The performance of the sheds was improved by local post-tensioning, which can reduce the weight of the structures.

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“…This means that post-tensioned beams have much economic and technical superiority. Ghannam et al [25] investigated the post-tension of the steel frames and showed that using post-tensioned cables on a bridge with a curved steel beam causes a decrease in the tensions of the main curvy beam and as a consequence increases the loading capacity. Hosseini et al [17] presented a comparative analysis between the structural performance and cost of using iron-based shape memory alloy (Fe-SMA) vs. carbon fiber reinforced polymer (CFRP) reinforcements for the prestressed strengthening of existing civil structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Response of the Post-Tensioned Tapered Steel Beams with Shape Memory Alloy Tendons

Hosseinnejad

Yaghin

Hosseinzadeh

et al. 2021

IJE

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The external post-tension technique is one of the best strengthening methods for reinforcement and improvement of the various steel structures and substructure components such as beams. In the present work, the load carrying capacity of the post-tensioned tapered steel beams with external shape memory alloy (SMA) tendons were studied. 3D nonlinear finite element method with ABAQUS software is used to determine the effects of the increase in the flexural strength, and the improvement of the load carrying capacity. The effect of the different parameters, such as geometrical characteristics and the post-tension force applied to the tendons were also studied in this research. The results revealed that the external posttension with SMA tendons in comparison with the steel tendons caused a significant improvement of the loading capacity. According to this, using SMA tendon for the reinforcement of the tapered beams resulted in a decrease in weight of these structures and as a consequence responded economic benefits in their application. This method can be used extensively for steel beams due to low executive costs and simplicity of the operation for post-tension.

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Effect of post tensioning on strengthening different types of steel frames

Cited by 9 publications

References 6 publications

Regulation of Stress-Deformed State in Compressed Elements of Steel Frames

Regulation of Stress-Deformed State in Compressed Elements of Steel Frames

Theoretical Analysis on the Behavior of Reinforced Industrial Shed Structures with Shape Memory Alloys

Numerical Investigation of Response of the Post-Tensioned Tapered Steel Beams with Shape Memory Alloy Tendons

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