Seismic response of steel braced frames with shape memory alloy braces

Asgarian, Behrouz; Moradi, Saber

doi:10.1016/j.jcsr.2010.06.006

Cited by 90 publications

(50 citation statements)

References 30 publications

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“…There are several researches in the literature, which aim at exploring and developing SMA‐based braces capable of enhancing the seismic performance of structures (Auricchio et al ., ; McCormick et al ., ; Asgarian and Moradi, ). Yang et al .…”

Section: Introductionmentioning

confidence: 86%

Incremental dynamic analysis of steel frames equipped with NiTi shape memory alloy braces

Moradi

Alam

Asgarian

2014

Structural Design Tall Build

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SUMMARY This paper determines the seismic performance of four‐storey concentrically braced frames equipped with either steel buckling‐restrained braces or buckling‐restrained superelastic shape memory alloy (SMA) braces through incremental dynamic analysis. The incremental dynamic analysis technique is used to examine the behaviour of four‐storey braced frames with four different bracing configurations (including diagonal, split‐X, chevron‐V and inverted‐V) under 20 different ground motion records. The study reveals a satisfactory performance at the design intensity level for both types of braced frames. The results show that the SMA braces lead to a uniform distribution of inelastic response over the height of the buildings, as well as mitigating seismic response in terms of maximum inter‐storey drift and residual roof displacement. By comparing the responses of SMA and buckling‐restrained braced frames under higher intensities of earthquake loading, it is found that the SMA braces can be more beneficial especially under severe ground motion excitations. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 86%

Incremental dynamic analysis of steel frames equipped with NiTi shape memory alloy braces

Moradi

Alam

Asgarian

2014

Structural Design Tall Build

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“…Motahari et al [13] implemented a damper using different phases of SMA to produce a reasonable behavior which is efficient for both energy dissipation and recentering capabilities. Asgarian and Moradi [14] evaluated the seismic performance of steel frames equipped with SMA braces. The results indicated that SMAs are favorable materials which lead to reduction in residual displacement and peak interstory drift.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Application of Intelligent Passive Devices Based on Shape Memory Alloys in Seismic Control of Structures

2016

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In this study, seismic application of an innovative control device called self-centering hybrid damper (SCHD) is investigated. Two main characteristics of the SCHD result in structural response mitigation. Steel pipe as a vertical link and two transverse pairs of Shape Memory Alloy (SMA) wires are used as energy dissipation and recentering components, respectively. Adjustable design parameters including design load, incorporation percentage of SMA, pipe height and wire inclination angle provide desirable structural responses. A numerical parametric study revealed the effect of each parameter on device performance. Besides, an optimum incorporation percentage of SMA in design load was obtained from the parametric study. The results also indicated that in addition to ideal energy dissipation capability, SCHDs can effectively reduce the permanent displacement. Nonlinear timehistory analysis of a 5-story building equipped with the SCHD was conducted to evaluate the effectiveness of the device. The results indicated that utilization of the proposed innovative damper is an effective way in reduction of roof acceleration, peak interstory drift and permanent displacement.

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“…erefore, for the purpose of protecting such main members, the damper devices installed on the bracing member are designed to concentrate the displacement and load and have been used as consumable products that can be easily replaced when damaged [7][8][9]. Although the conventional bracing damper system has an excellent ability not only to absorb the external impact but also to diminish the structural vibration, it has the disadvantage of requiring additional maintenance due to the residual deformation caused by the lack of recentering capability [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Behavior of Bracing Damper Systems by Utilizing Metallic Yielding and Recentering Material Devices

Noh

Ahn

2018

Advances in Materials Science and Engineering

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With the aim of effectively reducing the structural damage caused by earthquake events, bracing systems equipped with retrofitting damper devices, which take advantage of the energy dissipation and impact absorption, have been widely used in practical construction sites. ese bracing dampers, however, have been recognized as expendable supplies for easily replacing the damaged ones after a strong earthquake because they are commonly designed to undergo concentrated force and deformation for the purpose of protecting the main structural members such as the columns and beams. In this paper, the use of new superelastic shape memory alloy (SMA) dampers that can partially recover their original configuration is proposed to decrease the repair cost. In addition, the conventional steel dampers used for improving the energy dissipation arising due to metallic yielding are additionally integrated into the bracing member. e behaviors of such bracing systems with the damper devices were reproduced in experimental tests with the cyclic loading history, and then their strength capacity and recentering capability were estimated based on the experiment results. Finally, additional experimental tests were performed by imposing cyclic loading histories with different loading speeds on the superelastic SMA and steel plate damper specimens.

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Seismic response of steel braced frames with shape memory alloy braces

Cited by 90 publications

References 30 publications

Incremental dynamic analysis of steel frames equipped with NiTi shape memory alloy braces

Incremental dynamic analysis of steel frames equipped with NiTi shape memory alloy braces

Application of Intelligent Passive Devices Based on Shape Memory Alloys in Seismic Control of Structures

Experimental Investigation on the Behavior of Bracing Damper Systems by Utilizing Metallic Yielding and Recentering Material Devices

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