SMA-Based Low-Damage Solution for Self-Centering Steel and Composite Beam-to-Column Connections

Wang, Wei; Fang, Cheng; Feng, Weikang; Ricles, James M.; Sause, Richard; Chen, Yiyi

doi:10.1061/(asce)st.1943-541x.0002649

Cited by 39 publications

(8 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recovery of the strain is accompanied by a flag‐shaped hysteresis, which provides supplementary energy dissipation for the bearings 24 . SMAs also have excellent fatigue performance and corrosion resistance, making them ideal candidates for seismic application 28–40 . Dezfuli and Alam 7 gave a comprehensive summary of the past work on isolation bearings incorporated with monofilament SMA wires, 41–45 where the efficiency of the SMA‐based approach was confirmed, although several shortcomings were highlighted, including complex manufacturing, inefficiency in energy dissipation, and unreliable performance of grip at large deformation.…”

Section: Introductionmentioning

confidence: 99%

“…24 SMAs also have excellent fatigue performance and corrosion resistance, making them ideal candidates for seismic application. [28][29][30][31][32][33][34][35][36][37][38][39][40] Dezfuli and Alam 7 gave a comprehensive summary of the past work on isolation bearings incorporated with monofilament SMA wires, [41][42][43][44][45] where the efficiency of the SMA-based approach was confirmed, although several shortcomings were highlighted, including complex manufacturing, inefficiency in energy dissipation, and unreliable performance of grip at large deformation. A more comprehensive system-level analysis on structures (especially bridges) with SMA wire-based isolation bearings was subsequently carried out, 46,47 and optimization strategies have been proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seismic performance of bridges with novel SMA cable‐restrained high damping rubber bearings against near‐fault ground motions

Fang

Liang

Zheng

et al. 2021

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

This study presents a novel type of shape memory alloy (SMA) cable-restrained high damping rubber (SMA-HDR) bearing, which is particularly suited to nearfault (NF) regions where the pulsing effect potentially exists in the ground motions. The working mechanism of the bearing is first described, followed by an experimental investigation on a full-scale SMA-HDR bearing specimen. The test results confirm the efficient restraining effect offered by the SMA cables, which contribute to 65% and 24.4% of the lateral load resistance and total energy dissipation, respectively, prior to the initial fracture of the SMA cables. The failure of the cables is initiated near the end grip where moderate stress concentration exists at this region. Following the experimental study, the numerical modeling strategy for the bearing is discussed, and a case study is then presented, demonstrating the application of the SMA-HDR bearings in the Datianba #2 highway bridge, a real project that first adopts the proposed bearings in the world. A simplified design process is introduced for the bridge with novel SMA-HDR bearings to mitigate the potential damage during strong earthquakes especially the NF ones. The system-level analysis on the prototype bridge shows that the novel SMA-HDR bearings equipped with ten 7×7×1.2 SMA cables in each bearing could reduce the average maximum bearing displacement (MBD) by nearly 30% compared with the conventional bridge with HDR bearings. The application of the novel SMA-HDR bearing can significantly alleviate the pounding effect, especially under the NF earthquakes. The presence of the SMA cables tends to increase the maximum force response of the piers, but this effect is minor and under control.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic performance of bridges with novel SMA cable‐restrained high damping rubber bearings against near‐fault ground motions

Fang

Liang

Zheng

et al. 2021

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

show abstract

“…SMAs possess two well‐known characteristics, that is, shape memory effect (SME) and superelasticity (SE), 7–9 in which SE has attracted more considerable attention for seismic applications due to the spontaneous reversible deformation characteristics. Different types of SMA elements (e.g., wires, 10 bars, 11–13 cables, 8,9 disc springs, 14 and ring springs 15–17 ) have been manufactured and applied to bracing members, 18,19 dampers, 17,20 beam‐to‐column connections, 21–23 and base isolators 24,25 . Performance‐based seismic design methods are also proposed for SMA‐based structures (e.g., building structures 26,27 and reinforced concrete bridges 28,29 ) to meet desired performance targets including residual deformation control.…”

Section: Introductionmentioning

confidence: 99%

Risk‐targeted seismic design for collapse safety of SMA‐based structures considering temperature effect

Chen

Wang

Fang

2023

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

A risk‐targeted seismic design method for shape memory alloy (SMA)‐based structures is proposed in this study, taking account of temperature effect and the uncertainty of regional temperature distribution. To facilitate discussion of the overall performance of SMA‐based structures, the thermo‐mechanical behaviors of both SMA material and SMA‐based self‐centering braces (SMA‐SCB) are first introduced, where an advanced simulation method is developed. Aided by an extensive parametric study, the collapse capacity of SMA‐based structural systems is comprehensively investigated, where the predominant factors controlling the seismic performance are revealed. Based on the results, the concepts of collapse capacity‐temperature function and temperature‐modified collapse capacity are introduced in this study. The temperature‐modified collapse capacity combines the information of regional temperature distribution and temperature‐dependent behavior of the SMA‐based structures. The temperature‐modified collapse capacity is developed to determine the risk‐targeted design spectral acceleration for satisfying the specific risk‐targeted performance objective. The procedure of the proposed design method is then demonstrated by examining a three‐story SMA‐based self‐centering braced frame (SMA‐SCBF) building in a selected seismic‐active region, followed by a probabilistic method to evaluate the collapse risk. The results manifest that by using the proposed design method, the SMA‐based structures can successfully achieve acceptable performance during the design service life, and the influence of temperature should be carefully taken into consideration in both assessment and design phases.

show abstract

“…Especially, some multi-level SMA-based isolated bearing are designed, and system analysis shows their effectiveness to control the displacement of bridge superstructure (Cao et al, 2020, 2022a, 2022b; Deng et al, 2022). The application of SMA has also been extended to building structures (Chen et al, 2020, 2022; Fang et al, 2017; Ghassemieh et al, 2012; Li et al, 2022; Qiu et al, 2020, 2021; Wang et al, 2019a, 2019b, 2020; Yam et al, 2015; Yuan et al, 2017). Comparative studies focusing on steel and SMA restrainers (Choi et al, 2010; Li et al, 2018a, 2020a) suggested that the SMA solution is more efficient in limiting the relative displacement.…”

Section: Introductionmentioning

confidence: 99%

Performance-based life-cycle assessments of a resilient bridge system equipped with smart bearings

Liang

You

et al. 2022

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

A resilient bridge system with smart bearings, that is, shape memory alloy (SMA)-cable-based bearings, is proposed. Its superior resilience property over the conventional bridge system still lacks a practical assessment approach. This paper aims to conduct a comparative performance assessment of both resilient and conventional bridge systems regarding fragility and life-cycle loss aspects. The quasi-static test on the smart bearing prototype is firstly conducted. The cloud method is subsequently utilized to carry out a fragility assessment on the bridge system with uncertainties (e.g. damping, mass, friction factor, and length of slack cable). The result shows that the damage probabilities of the smart bearing at component level and the resilient bridge at system level are both dramatically alleviated although there is a moderate increase of the reinforced concrete pier at component level. Additionally, the analysis result reveals that the life-cycle economic loss of the resilient bridge system is remarkably reduced only at the cost of a slight increment in construction. This study tries to provide decision-makers with a more comprehensive understanding of the seismic superiority of the proposed resilient bridge system with smart bearings and to promote its application in engineering practice for resilience enhancement.

show abstract

SMA-Based Low-Damage Solution for Self-Centering Steel and Composite Beam-to-Column Connections

Cited by 39 publications

References 48 publications

Seismic performance of bridges with novel SMA cable‐restrained high damping rubber bearings against near‐fault ground motions

Seismic performance of bridges with novel SMA cable‐restrained high damping rubber bearings against near‐fault ground motions

Risk‐targeted seismic design for collapse safety of SMA‐based structures considering temperature effect

Performance-based life-cycle assessments of a resilient bridge system equipped with smart bearings

Contact Info

Product

Resources

About