Performance-based assessment of bridges with steel-SMA reinforced piers in a life-cycle context by numerical approach

Zheng, Yue; Dong, You

doi:10.1007/s10518-018-0510-x

Cited by 59 publications

(46 citation statements)

References 40 publications

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“…This model simplifies the sublooping behavior resulting from an incomplete phase transformation cycle 59 . The accuracy and efficiency of the flag‐shape model have been validated against the experimental results by several researchers 28 . Besides, this model has been used by several researchers in the OpenSees platform 28,41 .…”

Section: Case Studymentioning

confidence: 96%

“…A three‐dimensional (3D) finite‐element model of the bridge is generated in OpenSees 57 . The accuracy of the program in predicting the seismic response of the SMA RC members has been demonstrated by several researchers 28 . As shown in Figure 3A, elastic beam‐column elements are used to model the superstructure and pier caps so that these components remain elastic under earthquake excitations.…”

Section: Case Studymentioning

confidence: 99%

“…Billah and Alam 27 evaluated the seismic performance of SMA‐reinforced bridge piers using fragility functions at the component level but not at the system level. Zheng and Dong 28 investigated the vulnerability and long‐term performance of an SMA‐RC bridge. However, the considered bridge was not designed using a performance‐based approach and the plastic hinge length was evaluated using the Paulay and Priestley equation 29 without considering the effects of SMA bars 27 .…”

Section: Introductionmentioning

confidence: 99%

“…However, the conventional low‐cost restrainers have some limitations, such as limited ductility, poor energy‐dissipation capacity, and small elastic strain range 8 . Substantial damages have been reported in numerous cases where the restrainers transmitted higher seismic forces to the bridge piers 28,32 . To address this problem, SMA cable restrainers have been proposed, and experimentally and numerically investigated 33–39 .…”

Section: Introductionmentioning

confidence: 99%

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Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Wang

Alam

2020

Earthq Engng Struct Dyn

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The objective of this study is to analytically determine the effectiveness of a novel bridge system with superelastic (SE) shape memory alloy (SMA) reinforced concrete piers. The bridge is also equipped with SE SMA cable restrainers to prevent the bridge spans from a large displacement that can potentially cause span unseating. In the concrete bridge piers, the conventional steel reinforcements in the plastic hinge regions are replaced with SE SMA rebar to avoid large plastic deformation and improve its self-centering capacity. A typical three-span continuous highway bridge is modeled with SMA-reinforced piers and SMA restrainers. Numerical simulations of the bridge are conducted under destructive near-fault ground motions. The seismic responses and fragility curves of the novel bridge (Bridge IV) are assessed and compared with the reference bridge (Bridge I), the bridge with only SMA-reinforced piers (Bridge II), and the bridge with only SMA restrainers (Bridge III). The results revealed that the SMA-reinforced pier can successfully reduce the residual deformation and damage probability of the bridge; however, the bridge with only SMAreinforced piers is less efficient in preventing a large displacement. The use of SMA restrainers can efficiently limit the displacement of the bridge spans but increase the damage probability of the bridge piers. The proposed novel bridge having SMA-reinforced piers equipped with SMA restrainers (Bridge IV) is more efficient than the bridge with only SMA-reinforced piers (Bridge II)) or the bridge with only SMA restrainers (Bridge III).

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Section: Case Studymentioning

confidence: 96%

Section: Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Wang

Alam

2020

Earthq Engng Struct Dyn

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“…The 1994 Northridge, California, and 1995 Kobe, Japan earthquakes concluded, that life safety limit state can be achieved using conventional design methods, but can have huge economic consequence, not only limited to the immediate aftermath of an earthquake but also to the recovery phase of a building (Miles and Chang, 2006). Performance-based earthquake engineering (PBEE) methodology provides cost of repair in an earthquake event, which can be used to assess and reduce the immediate economic losses, but the indirect economic losses need further investigation (Bocchini et al, 2014; Dong et al, 2013; Zheng and Dong, 2019). In this article, both the direct (i.e.…”

Section: Introductionmentioning

confidence: 99%

Performance-based probabilistic framework for seismic risk, resilience, and sustainability assessment of reinforced concrete structures

Anwar

Dong

Zhai

2019

Advances in Structural Engineering

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Recent earthquakes have highlighted additional losses due to the lack of resilience of damaged structures. Environmental impact, as performance indicator, has also received increased attention within performance-based earthquake engineering. In this article, a combined probabilistic framework is proposed to assess seismic risk, sustainability, and resilience of a non-ductile reinforced concrete frame structure. The framework utilizes three-dimensional inelastic fiber-based numerical modeling approach to develop limit states associated with performance levels. The decision variables (i.e. repair cost, downtime, and equivalent carbon emissions) are quantified at both component level and system level and are compared considering seismic risk, sustainability, and resilience. In addition, the proposed approach considers uncertainties in the building performance and consequence functions of structural and non-structural components. Fast-track and slow-track schemes are utilized as a repair strategy and probabilistic resilience is quantified given the investigated time period. The proposed approach can aid the development of the next generation of performance-based engineering incorporating both resilience and sustainability.

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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

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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.

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Performance-based assessment of bridges with steel-SMA reinforced piers in a life-cycle context by numerical approach

Cited by 59 publications

References 40 publications

Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Seismic performance assessment of a multispan continuous isolated highway bridge with superelastic shape memory alloy reinforced piers and restraining devices

Performance-based probabilistic framework for seismic risk, resilience, and sustainability assessment of reinforced concrete structures

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

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