Behaviour Investigation of SMA-Equipped Bar Hysteretic Dampers Using Machine Learning Techniques

Farhangi, Visar; Jahangir, Hashem; Eidgahee, Danial Rezazadeh; Karimipour, Arash; Javan, Seyed Alireza Nedaei; Hasani, Hamed; Fasihihour, Nazanin; Karakouzian, Moses

doi:10.3390/app112110057

Cited by 13 publications

(6 citation statements)

References 92 publications

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“…SMA dampers can provide stiffness and are usually used in conjunction with an antilateral brace. SMA dampers typically utilize the superelastic and damping effects of the SMA to provide energy dissipation to a structure while reducing its lateral displacement and providing the ability of self-centering [91,92]. Liu et al [93] designed a tension-compression SMA damper and obtained its characteristic parameters through tests.…”

Section: Sma-based Damper and Bracementioning

confidence: 99%

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

Shao,

Huang

2023

Buildings

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The utilization of shape memory alloys (SMAs) to reinforce steel structures has been proven to be an efficient and reliable method, the structural strengthening needs can be met without the need for tensioning equipment by activating the SMAs to generate restoring stresses. This paper firstly introduces the properties of SMA, and then presents the latest research progress, opportunities and challenges of SMA in the field of steel structural reinforcement, both in terms of basic components and applications. In terms of components, the construction forms and working mechanisms of Fe-SMA strips, SMA/CFRP composite patches and SMA dampers are introduced. On this basis, the application of SMA in steel structures reinforcement is introduced, and its effect is analyzed from three aspects: crack restoration, seismic retrofitting and structural strengthening. Finally, the results of the current research are summarized and the shortcomings are analyzed, hoping to provide a reference for the research of SMA in the field of steel structures reinforcement.

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Section: Sma-based Damper and Bracementioning

confidence: 99%

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

Shao,

Huang

2023

Buildings

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“…To further evaluate the accuracy of the analytical model, prominent evaluation parameters [23] such as R 2 (coefficient of determination), MSE (Mean Square Error), RMSE (Root-Mean-Square Error), MAE (Mean Absolute Error) and MAPE (Mean Absolute Percentage Error) have been calculated by means of Eqs. (64)-(68):…”

Section: Model Accuracymentioning

confidence: 99%

Evaluation of the Bond Stress Transfer Mechanism in CFSTs

Somma

Vit²

2022

Int J Civ Eng

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This paper studies the non-linear distribution of bond–slip behavior in the steel concrete interface of a Concrete Filled Steel Tube (CFST). Specifically, it concerns the regions of geometric discontinuity occurring in composite beams of CFST column-frame connection points. The study was conducted through an analytical model that represented the bond stress transfer mechanism within these areas. The resulting deductions were drawn up on the basis of the elasticity theory and the non-linear bond–slip relationship between the steel jacket and the confined concrete. This paper highlights how the model proposed here was able to obtain, not only the closed-form analytical expression of the transferring length involved in the bond stress transfer mechanism in CFSTs but also the expressions of concrete and steel jacket stresses and strains. In addition, the procedure also obtained the bond stress and slip trend in the above-mentioned length for rectangular and circular concrete filled steel tubes. The use of this model also resulted in an analytical expression for the calculation of the ultimate load in CFSTs. In this paper, the ultimate load predictions were compared with the experimental results obtained from 97 tests carried out on circular concrete filled tubes (CCFTs) and 35 tests on rectangular concrete filled tubes (RCFTs). The predictions drawn up with this model have been found to be the most accurate and uniform in comparison with those obtained from models proposed by other authors and Eurocode. With reference to the experimental-to-analytical load value ratio, the AVG and COV values obtained from the model proposed here are 0.86 and 0.42, and 1.06 and 0.57 for CCFT and RCFT analyses, respectively.

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Section: Introductionmentioning

confidence: 99%

“…An effective method to mitigate the vibration problems for curved pedestrian bridges is to employ dampers [6][7][8][9][10][11]. Bar hysteretic dampers were proposed to dissipate energy through bending mechanisms [10,11], and shape memory alloy was used to replace steel bars to achieve re-centering properties [11]. Among different types of dampers, tuned mass dampers were adopted for vibration control in many projects since they are costeffective and easy to deploy in both new and existing structures [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Lateral Vibration Control of Long-Span Small-Radius Curved Steel Box Girder Pedestrian Bridge with Distributed Multiple Tuned Mass Dampers

Wei

Lv²,

Wu³

et al. 2022

Sensors

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Curved pedestrian bridges are important urban infrastructure with the desired adaptability to the landscape constraints and with aesthetic benefits. Pedestrian bridges feature thin cross-sections, which provide sufficient load capacities but lead to low natural frequencies that make the bridges susceptible to vibration under pedestrian excitation. This study investigates the lateral vibration of a curved bridge with a small radius down to 20 m, proposes an approach to mitigate the lateral vibration of bridges with large curvatures using distributed multiple tuned mass dampers (MTMD), and conducts in-situ bridge tests to evaluate the vibration mitigation performance. The lateral vibration was investigated through in-situ tests and finite element analysis as well as the code requirements. The key parameters of the distributed MTMD system were improved by strategically selecting the mass ratio, bandwidth, center frequency ratio, and damper number. The results showed that the curved bridge was subjected to significant lateral vibration due to the coupling of torque and moment, and the recommended design parameters for the studied bridge were derived, i.e., the total mass ratio is 0.02, bandwidth is 0.15, center frequency ratio is 1.0, and damper number is 3. The proposed approach effectively improves the deployment of MTMD for lateral vibration control of the curved bridge. The field tests showed that the vibration was reduced by up to 82% by using the proposed approach.

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Behaviour Investigation of SMA-Equipped Bar Hysteretic Dampers Using Machine Learning Techniques

Cited by 13 publications

References 92 publications

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

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

Evaluation of the Bond Stress Transfer Mechanism in CFSTs

Lateral Vibration Control of Long-Span Small-Radius Curved Steel Box Girder Pedestrian Bridge with Distributed Multiple Tuned Mass Dampers

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