Passive Hybrid System for Seismic Failure Mode Improvement of a Long-Span Cable-Stayed Bridges in the Transverse Direction

Xie, Wei; Sun, Lijun

doi:10.1260/1369-4332.17.3.399

Cited by 9 publications

(5 citation statements)

References 24 publications

(21 reference statements)

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“…But the stiffness of the structure is increased due to the consolidation system, and redundant structural responses will be generated under a large earthquake. In view of this problem, scholars [19,20,21,22] proposed various seismic control schemes on super-long cable-stayed bridges. Infanti et al [23] In this investigation, by conducting experimental performance tests and numerical simulation, the performance of the new damping system and its equivalent design method were verified.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Seismic Evaluation and Experimental Tests of Multi-Direction Damping System on a Super-Long Column-Pylon Cable-Stayed Bridge

Chen

et al. 2023

Journal of Earthquake Engineering

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In view of the insufficiency of bidirectional seismic control of long span cable-stayed bridges as well as the limitations of existing schemes, a multi-direction damping system (MDDS) was proposed and investigated in this manuscript, which can provide seismic resistance bidirectionally. The new damping system owned a unique middle connecting structure, which overcomes the disadvantages that axial instability caused of excessive long rod and the demand of large installing space of traditional dampers. Both the performance stability and constitutive relationship of MDDS were verified by engineering tests, and the equivalent design method was then proposed and proved to be applicable. A detailed finite element numerical model of a super-long (main span over 800m) column-pylon cable-stayed bridge which equipped with MDDS in practice was established, the fragility curves of critical components were obtained by non-linear time history analysis, which exhibited the high efficiency of MDDS seismic performance in both transversal and longitudinal directions. Through extracting the median fragility value of 35 sections of the pylon under four damping cases i.e. setting dampers transversely (TDS), longitudinally (LDS), bidirectionally (BDS) and MDDS, it can be concluded that MDDS performed far better on seismic resistance than LDS and TDS, and made the similar contribution with BDS. On account of half number of damper setting and the reduction in installing space demand, MDDS becomes the optimal choice in practical application for its economical efficiency and superiority. Furthermore, the optimal horizontal installing angle of MDDS was derived through six angle cases which was based on the system-level fragility curves comparison.

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Section: Introductionmentioning

confidence: 99%

Probabilistic Seismic Evaluation and Experimental Tests of Multi-Direction Damping System on a Super-Long Column-Pylon Cable-Stayed Bridge

Chen

et al. 2023

Journal of Earthquake Engineering

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“…Combining with passive dampers further, hybrid control systems were then proposed for the seismic protection of cable-stayed bridges (Iemura and Pradono, 2002; Jung et al, 2004; Park et al, 2003). Xie and Sun (2014) proposed a passive hybrid control system to suppress the seismic response of a trial designed cable-stayed bridge. The pseudo negative stiffness dampers, which had negative slopes in the hysteretic loops, were also explored to increase the damping level of the components in cable-stayed bridges, such as the stay cables (Shi et al, 2016, 2017a, 2017b; Shi and Zhu, 2015; Zhou and Li, 2016) and the towers (Iemura and Pradono, 2003, 2005, 2009).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on seismic control of towers in cable-supported bridges by incorporating fluid viscous dampers between sub-towers

Zhou

Liu

et al. 2020

Advances in Structural Engineering

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In this article, the seismic control of towers incorporated with fluid viscous dampers between sub-towers is investigated experimentally. To replace one entire tower, an alternative scheme consisting of four separate sub-towers is first proposed. Fluid viscous dampers are utilized as energy dissipation devices to be installed between sub-towers. Experimental tests are conducted to study the damping force characteristics. Three control strategies with various distributions of these dampers between sub-towers are developed. Then, a series of shaking table tests are carried out to evaluate the control performance of the proposed control strategies. Different earthquake records are adopted as seismic loadings. Experimental results clearly show a remarkable reduction in the towers seismic responses, including the accelerations, relative displacements, and strains. Rather than attaching dampers in concentrated ways, the strategy of distributing dampers uniformly behaves better.

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“…The failure mode of the trial designed super long-span CSB without considering pile-soil-structure interaction (abbr. to PSSI) effects was studied under earthquake and the tower shown double plastic hinges in the transverse direction [9]. Although many researches have been conducted on the seismic damages and failure modes of structures including long-span bridges in the longitudinal direction, studies on flexible structures are meager in the transverse direction, particularly for super long-span CSBs considering PSSI effects because such flexible structures can be prone to significant PSSI effects.…”

Section: Introductionmentioning

confidence: 99%

“…The new structural system using sacrificial supporting piers as energy dissipation components to protect towers from seismic damage was proposed by Sun and Xie [20]. The passive hybrid control system comprising the additional energy dissipation links and VFDs was reported in the reference [9], but the study did not consider the influences of the pile-soil interaction on the seismic responses. In addition, basic theoretical and dynamic analyses on soil-foundation have been reported in references [21,22].…”

Section: Introductionmentioning

confidence: 99%

Transverse failure modes and control strategies of super long-span cable-stayed bridge under extreme earthquake

Xie¹,

Sun²

2017

J. vibroeng.

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This work is focused on the failure modes and control strategies of a trial designed super long-span cable-stayed bridge (Abbr. CSB) with a main span of 1400 m under various seismic intensities, exploring the key characteristic of the failure modes of super high tower. Then several control strategies, such as the use of conventional viscous fluid dampers (Abbr. VFDs) and a new combination strategy comprising sacrificial inelastic links and conventional VFDs, are presented for the failure modes improvement and the seismic damage mitigation of the CSB under extreme earthquake (PGA = 1.0 g). It is found that the super high tower experiences an unexpected failure mode with double plastic hinges that shows a new characteristic on the tower failure in the transverse direction, which is different from that of the short-and medium-span cable-stayed bridge during earthquake excitation. Whereas the piers show a typical and expected flexural failure mode with only one plastic hinge in the transverse direction. Although conventional control strategies using the optimal VFDs can help to significantly reduce the seismic damage of the CSB, they cannot entirely make the tower satisfy seismic control targets. It is also observed that the new combination strategy can successfully improve the failure mode and seismic damage of the CSB that satisfies seismic control targets, the effects of proposed combination strategy on the CSB are superior to those of the convention control strategy with the optimal VFDs.

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Passive Hybrid System for Seismic Failure Mode Improvement of a Long-Span Cable-Stayed Bridges in the Transverse Direction

Cited by 9 publications

References 24 publications

Probabilistic Seismic Evaluation and Experimental Tests of Multi-Direction Damping System on a Super-Long Column-Pylon Cable-Stayed Bridge

Probabilistic Seismic Evaluation and Experimental Tests of Multi-Direction Damping System on a Super-Long Column-Pylon Cable-Stayed Bridge

Experimental study on seismic control of towers in cable-supported bridges by incorporating fluid viscous dampers between sub-towers

Transverse failure modes and control strategies of super long-span cable-stayed bridge under extreme earthquake

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