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

Abstract

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.

Advances in Shape Memory Alloy-Based Reinforcement in Steel Structures: A Review

“…The four-point bending test results showed that compared with the unreinforced beams, the ultimate load and flexural stiffness of the SMA/CFRP-composite-reinforced beams increased by 79.2% and 57.9%, respectively, basically equal to the sum of the effects of the SMA reinforcement alone and CFRP reinforcement alone. Hosseinnejad et al [114,115] increased the bearing capacity of steel beams by arranging pre-stressed SMA tendons outside their bodies. The analysis results show that the arrangement of SMA tendons increases the structural-load-carrying capacity more than the arrangement of steel tendons, and the pre-stressing is conveniently applied.…”

A Parametric Study on Improved Reduced Beam Section Connections with Post-tensioning to Enhance Seismic Resilience

“…Gerami [10] has investigted the steel moment frames using novel post-tensioned connections. Hosseinnejad et al [11] investigated the use of smart materials (e.g., SMA) in post-tensioned connections.…”

Performance of Reinforced Concrete Shear Wall Equipped with an Innovative Hybrid Damper

“…Barkhordari and Tehranizadeh [25] evaluated the effect of tuned mass damper (TMD), viscous damper, friction damper, and lead core rubber bearing in damage control and seismic response of high-rise structures equipped with a concrete shear wall. Hosseinnejad et al [26] studied the load-bearing capacity of the post-tensioned tapered steel beams by shaped memory alloy (SMA) tendons. Heydari and Gerami [27] investigated the approach of moment frames with conventional welded connections using a reversible system.…”