Seismic response analysis of long-span and asymmetrical suspension bridges subjected to near-fault ground motion

Zheng, Shixiong; Xinhu, Shi; Jia, Hongyu; Zhao, Canhui; Qu, Honglue; Shi, Xin-long

doi:10.1016/j.engfailanal.2020.104615

Cited by 36 publications

(9 citation statements)

References 29 publications

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“…And there might be topographic limitations and an overall lack of other options aside from building bridges. Bridges crossing a fault will very likely suffer serious near-fault ground motions due to an earthquake during the design lifetime [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Seismic Damage Analysis of Large-Span Tied-Arch Bridge with Concrete-Filled Steel Tubes Subjected to Near-Fault Ground Motion

Xia

Liu

et al. 2022

Geofluids

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In this study, the damage mechanism due to near-fault ground motions on large-span arch bridges with concrete-filled steel tubes was investigated based on a case study. A tied-arch bridge with concrete-filled steel tubes with a span of 460 m has been examined using the numerical simulation method. The performance of the bridge was analyzed in terms of displacement, overall response, internal force changes, and damage probability considering the various near-fault and non-near-fault ground motions when imposing load onto the bridge. Then, the relationship between the bridge damage and the design parameters of ground motion intensities, near-fault velocity pulse, and excitation angle was obtained. The results indicated that the probability of damage caused by near-fault earthquakes is significantly higher than that by non-near-fault ground motions, and velocity pulses may cause more severe damages to certain components of the bridge during lower-intensity ground motions at certain excitation angles. And the damage furtherly resulted in the weakening of the bridge structure and decrease in its load-carrying capacity. Therefore, the near-fault ground motion should be fully considered in the design of large-span arch bridges with concrete-filled steel tubes in practical engineering.

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Section: Introductionmentioning

confidence: 99%

Seismic Damage Analysis of Large-Span Tied-Arch Bridge with Concrete-Filled Steel Tubes Subjected to Near-Fault Ground Motion

Xia

Liu

et al. 2022

Geofluids

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“…Traditional seismic performance analysis of bridges depends on test 10‐12 . Test data (modal, seismic load, ground fault, and other working conditions 13‐15 ) are acquiring by efficient, modular digital sensors at the measuring points of the bridge or scaled model 16‐18 . Numerical method presents short period and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] Test data (modal, seismic load, ground fault, and other working conditions [13][14][15] ) are acquiring by efficient, modular digital sensors at the measuring points of the bridge or scaled model. [16][17][18] Numerical method presents short period and low cost. In particular, it can obtain the ultimate seismic performance and full-time, global dynamic response of the bridges.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance analysis of a concrete filled steel tubes arch bridge: A parametric study

Zhang

Sun

Wen

et al. 2022

Engineering Reports

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Numerical method is widely used in bridge seismic performance analysis, but the diversity and complexity structures increase trouble in the modeling process. This article presents a systematic, universal, and flexible bridge numerical modeling method, and the seismic performance of a concrete filled steel tubes arch bridge is studied. The geometric/attribute model involves structural/stiffness equivalence, and the bridge parametric modeling strategy combined commercial computer‐aided design language of software MATLAB and ANSYS. Data exchange in different fields and rapid reconstruction of numerical model are realizing. Finally, the vibration mode, deformation and internal force of the bridge under seismic load are studied. The results indicating that the proposed parametric model formed a complete data transfer process, and the bridge model can be rapidly modifying and reconstructing. The numerical calculation efficiency is greatly improved because of the structure element is employed instead of solid element. The displacement and internal force of arch rib are mainly controlling by lateral load under horizontal uni‐input, and the combined horizontal and vertical load should be considering in seismic design. The leaning angle and width‐span ratio of transverse braces are considered to improve the seismic performance of bridges.

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“…Zhang et al [17] evaluated the seismic response of a simply supported girder bridge under six sets of near-fault ground motions, considering contact and separation between the girder and abutment in the longitudinal direction, and concluded that the peak bridge response increased as the amplitude and period of the ground motion pulse increased. Zheng et al [18] investigated the seismic response of a long-span asymmetrical suspension bridge subjected to four levels of near-fault ground motions. The results showed that compared to far-field ground motions, the response and power spectrum values were several times higher in the long-period range, and the seismic response of the bridge tower increased significantly under the near-fault ground motions, especially in soft soil.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response of Skewed Integral Abutment Bridges under Near-Fault Ground Motions, Including Soil–Structure Interaction

2021

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Studies on the seismic response of skewed integral abutment bridges have mainly focused on response under far-field non-pulse-type ground motions, yet the large amplitude and long-period velocity pulses in near-fault ground motions might have significant impacts on bridge seismic response. In this study, the nonlinear dynamic response of an skewed integral abutment bridge (SIAB) under near-fault pulse and far-fault non-pulse type ground motions are analyzed considering the soil–structure interaction, along with parametric studies on bridge skew angle and compactness of abutment backfill. For the analyses, three sets of near-fault pulse ground motion records are selected based on the bridge site conditions, and three corresponding far-field non-pulse artificial records are fitted by their acceleration response spectra. The results show that the near-fault pulse type ground motions are generally more destructive than the non-pulse motions on the nonlinear dynamic response of SIABs, but the presence of abutment backfill will mitigate the pulse effects to some extent. Coupling of the longitudinal and transverse displacements as well as rotation of the bridge deck would increase with the skew angle, and so do the internal forces of steel H piles. The influence of the skew angle would be most obvious when the abutment backfill is densely compacted.

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Seismic response analysis of long-span and asymmetrical suspension bridges subjected to near-fault ground motion

Cited by 36 publications

References 29 publications

Seismic Damage Analysis of Large-Span Tied-Arch Bridge with Concrete-Filled Steel Tubes Subjected to Near-Fault Ground Motion

Seismic Damage Analysis of Large-Span Tied-Arch Bridge with Concrete-Filled Steel Tubes Subjected to Near-Fault Ground Motion

Seismic performance analysis of a concrete filled steel tubes arch bridge: A parametric study

Seismic Response of Skewed Integral Abutment Bridges under Near-Fault Ground Motions, Including Soil–Structure Interaction

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