Seismic Performance of a Novel Single and Double Spring-Based Piston Bracing

Issa, Anas; Alam, M. Shahria

doi:10.1061/(asce)st.1943-541x.0002245

Cited by 60 publications

(12 citation statements)

References 31 publications

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“…The axial displacement of the assembly is accompanied by sliding between the rings on the grooved conical friction surface for energy dissipation, while the restraining effect of the outer rings creates circumferential compressive forces acting onto the grooved surface to recenter the assembly. The seismic performance of ring-spring dampers was first experimentally evaluated by Filiatrault et al (2000), which was followed by research on the use of self-centering ring-springs in seismic dampers (Bishay-Girges and Carr, 2014; Fang et al, 2016, 2019; Zhu et al, 2020), bracing systems (Issa and Alam, 2019), and beam-to-column joints (Fang et al, 2018; Khoo et al, 2012).…”

Section: Self-centering Mechanical Devicesmentioning

confidence: 99%

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Zhong

Christopoulos

2021

Earthquake Spectra

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This state-of-the-art review provides an overview of the evolution of self-centering structures from early historical structures that inherently exhibited a recentering response to modern systems engineered for enhanced seismic resilience. From the early research investigations that were conducted since the 1960s, to the sharp increase of interest in this topic over the last two decades, self-centering seismic-resistant structures that can mitigate both damage and residual drifts following major earthquakes have seen significant advances. These systems achieve the intended self-centering response by either allowing for the rocking of primary structural elements in a controlled manner, commonly coupled with mechanical restraints and energy dissipation devices, or by including self-centering devices as main structural or supplemental structural members. To better explain the concepts and the underlying mechanics governing their seismic response, detailed schematic illustrations were developed in this article, highlighting the fundamentals behind each of these systems. This article covers a historical overview, presents the state of the research and of the art, discusses general design challenges and practical considerations, and concludes with future research needs to advance the development and broader application of self-centering systems in real structures.

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Section: Self-centering Mechanical Devicesmentioning

confidence: 99%

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Zhong

Christopoulos

2021

Earthquake Spectra

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“…Finite element program OpenSees, which has been specifically designed for seismic analysis and earthquake simulations, was utilized to perform the inelastic analysis of the braced frame structures in this study. For this reason, a fiber section approach and nonlinear beam–column elements were utilized to define the cross‐section and the elements, respectively.…”

Section: Analytical Modelingmentioning

confidence: 99%

“…On the other hand, repairing the residual deformations can be expensive and even impossible . In recent years, researchers have attempted to utilize self‐centering BRB systems containing SMA material to improve its ductility characteristics and decreasing residual deformations in structures . Miller investigated the cyclic behavior and performance of a self‐centering buckling‐restrained brace (SC‐BRB), which includes a typical BRB component and pretensioned superelastic nickel–titanium SMA rods.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of steel braced frames with self‐centering buckling‐restrained brace utilizing superelastic shape memory alloys

Nazarimofrad

Shokrgozar

2019

Structural Design Tall Build

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Buckling-restrained braced frame (BRB) is one of the newest seismic force-resisting systems used in buildings. However, one of the requirements for designing a structure is to provide a ductility behavior of structures to dissipate earthquake energy and to avoid residual drifts. These days, self-centering seismic lateral force-resisting systems have drawn attention due to their potentials to solve the above mentioned issues. On the other hand, shape memory alloys (SMAs) are characterized by unique superelastic behavior, which enables the material to recover its original shape after experiencing large deformations. The goal of this study is to assess BRBs whose ductility are improved by utilizing SMA. Nonlinear time history and incremental dynamic analysis techniques are applied to investigate the behavior of the two frames with different stories (four and eight stories) under different ground motion records. The results showed that utilizing BRB made of hybrid steel and SMA resulted in increasing ductility of the structure and decreasing residual displacements of the structures. KEYWORDS brace, ductility, dynamic pushover, nonlinear time history, self-centering, SMA | INTRODUCTIONThere are a plenty of seismic resistant members that have been developed to reduce the likelihood of collapse of structures subjected to earthquake such as braces, [1][2][3][4][5] shear wall, [6,7] confined reinforced concrete structures, [8] filled with high-performance concrete, [9] concrete-filled-steel tube structures, [10] and so on. These days, buckling-restrained braced frames (BRBs) have increasingly been employed as seismic load-resisting systems in the area with high seismic hazard due to the fact that their performance is much better than that of conventional braced frames.Despite the fact that the global geometric configuration of a BRB is very similar to a conventional braced frame, however, the members and behavior of BRB is clearly different from those of conventional braced frames. The key difference is that BRB systems do not buckle. [5,[11][12][13] Conventional braced frames have shown a poor performance in several recent ground motions because of limited ductility, insufficient energy dissipation capacity, and large residual deformations. [14] It is affirmed that BRBs made of steel efficiently resulted in providing structures with significant ductility, stable hysteretic behavior, and large energy dissipation capacity. [15] However, past studies have shown that steel BRBs commonly are brittle and undergo a large residual deformation after earthquakes. [16] The appearance of large residual deformations caused by strong earthquakes makes the residents of building insecure and may even demolish the building. On the other hand, repairing the residual deformations can be expensive and even impossible. [17] In recent years, researchers have attempted to utilize self-centering BRB systems containing SMA material to improve its ductility characteristics and decreasing residual deformations in structures. [18][19][20][21][22][2...

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“…The present article attempts to establish a design basis for stacked rocking systems as a low‐damage structural system. The modular stacked cores, placed on top of each other, are composed of braced frames or concrete walls (Figure 1a) and equipped with posttension cables (PTs) as well as energy dissipation devices (EDs) such as piston‐based friction spring dampers, [ 19,20 ] steel shear plates with openings, [ 21 ] and viscous dampers. [ 22 ] Through controlled uplift at the rocking sections, SRCs confine earthquake‐induced damage to interchangeable energy‐dissipating fuses, and posttensioning provides restoring capability.…”

Section: Introductionmentioning

confidence: 99%

A discontinuous cantilever beam analogy for quantifying higher mode demands in stacked rocking cores

Rahgozar

2021

Structural Design Tall Build

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Summary Stacked rocking core (SRC) combinations are innovative sustainable structural assemblies that mitigate seismic demands through uplift at the hinge joints and direct damage to replaceable fuses. The stacked segments curtail substantially higher mode effects by the relative motions between multilevel cores. Currently, few research studies have quantified the behavior of SRCs under earthquake shaking. This paper presents a novel closed‐form solution for quantifying the higher mode demands of stacked braced frames subjected to seismic excitation. The mathematical formulae for modal analysis are derived using the analogy of discontinuous cantilever beam and Euler–Bernoulli equation. The proposed equations provide a method for rapid analysis and preliminary design of low‐ to mid‐rise SRCs. A parametric study is carried out to investigate the influences of rotational restraint of segments and the location of the rocking joints. Results verified by time response analysis indicate the validity and accuracy of the suggested formulae.

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Seismic Performance of a Novel Single and Double Spring-Based Piston Bracing

Cited by 60 publications

References 31 publications

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Self-centering seismic-resistant structures: Historical overview and state-of-the-art

Seismic performance of steel braced frames with self‐centering buckling‐restrained brace utilizing superelastic shape memory alloys

A discontinuous cantilever beam analogy for quantifying higher mode demands in stacked rocking cores

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