Shake Table Tests of Tall-Pier Bridges to Evaluate Seismic Performance

Xu, Chao; Guan, Zhongguo; Li, Jianzhong; Spencer, Billie F.

doi:10.1061/(asce)be.1943-5592.0001264

Cited by 65 publications

(33 citation statements)

References 12 publications

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“…For example, our study shows that with a higher slenderness ratio, the structure can deform much larger at the same damage level. In addition, tall pier specimens can be reinforced with sufficient longitudinal steels and confinements to prevent mid-height plastic response and shear failure, as shown in this study and others, such as Chen et al [4].…”

Section: Model Verification and Discussionmentioning

confidence: 66%

“…For the specimens B4 and B5, the interval spacing in the bottom area were 70 and 100 mm, respectively. Sufficient longitudinal steels are included in pier specimens to present the mid-height plastic response, and sufficient confinements were used to improve the pier ductility and prevent shear failure, as reported by Chen et al [4].…”

Section: Test Specimen and Preparationmentioning

confidence: 99%

“…In countries like China, most bridges with hollow sections are located in seismic areas. For example, more than 40% of bridges in southwest China have high RC hollow piers with a height of more than 40 m [3,4]. The damage or failure of hollow RC bridge piers has been reported in several earthquakes, such as the devastating magnitude 7.9 (Wenchuan) earthquake in 2008 [5].…”

Section: Introductionmentioning

confidence: 99%

“…The damage or failure of hollow RC bridge piers has been reported in several earthquakes, such as the devastating magnitude 7.9 (Wenchuan) earthquake in 2008 [5]. However, current seismic design codes provide guidelines for short to medium-height piers instead of hollow tall bridge piers [4,6]. The high slenderness ratio and axial load ratio of hollow, large mass RC piers could produce different seismic performance compared with normal concrete piers.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seismic Damage Model of Bridge Piers Subjected to Biaxial Loading Considering the Impact of Energy Dissipation

2019

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The large degradation of the mechanical performance of hollow reinforced concrete (RC) bridge piers subjected to multi-dimensional earthquakes has not been thoroughly assessed. This paper aims to improve the existing seismic damage model to assess the seismic properties of tall, hollow RC piers subjected to pseudo-static, biaxial loading. Cyclic bilateral loading tests on fourteen 1/14-scale pier specimens with different slenderness ratios, axial load ratios, and transverse reinforcement ratios were carried out to investigate the damage propagation and the cumulative dissipated energy with displacement loads. By considering the influence of energy dissipation on structural damage, a new damage model (M-Usami model) was developed to assess the damage characteristics of hollow RC piers. The results present four consecutive damage stages during the loading process: (a) cracking on concrete surface, (b) yielding of longitudinal reinforcements; (c) spalling of concrete, and (d) collapsing of pier after the concrete crushed and the longitudinal bars ruptured due to the flexural failure. The damage level caused by the seismic waves can be reduced by designing specimens with a good seismic energy dissipation capacity. The theoretical damage index values calculated by the M-Usami model agreed well with the experimental observations. The developed M-Usami model can provide insights into the approaches to assessing the seismic damage of hollow RC piers subjected to bilateral seismic excitations.

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Section: Model Verification and Discussionmentioning

confidence: 66%

Section: Test Specimen and Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seismic Damage Model of Bridge Piers Subjected to Biaxial Loading Considering the Impact of Energy Dissipation

2019

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“…Ji et al [12] extended the calculation of free vibration characteristics of a thin-walled box girder to a composite box girder with corrugated steel webs. Chen et al [13] investigated the effects of higher modes on the seismic performance of tall-pier bridges by shaking table test. Tubaldi E. et al [14] studied the influence of both axial load and higher-order modes on the dynamic behavior and seismic response of slender bridge piers by an analytical formulation and a continuous model.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of long-span continuous curved box girder bridge under seismic excitation

Cai¹,

Lu²

2019

J. vibroeng.

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Form function matrix is created by introducing high order displacement interpolation function in the node. Based on the virtual work principle and dynamic finite element theory, the spatial element stiffness matrix, mass matrix and earthquake mass matrix of a thin-walled box girder having 9 freedom degrees at each node are deduced. The D'Alembert vibration equation is also established. Newmark-method is used through MATLAB to solve the seismic response of a long-span continuous curved box girder bridge under El-centro seismic waves. Meanwhile the spatial finite element model of the whole bridge is established by ANSYS. The results indicate that the dynamic responses of pier columns exhibit spatiality. The dynamic response of a bridge structure under 2D coupling horizontal seismic excitation is much bigger than that under 1D horizontal seismic excitation. The critical angle of seismic waves is 50° for radial displacement response. Theoretical calculation results are in agreement with the finite element analysis results. The deduced element matrix not only can be used to calculate the seismic response of long-span curved beam bridge structures but also can provide significant references for the structures in vibration response caused by moving traffic.

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Seismic analysis and test facilities of deep‐water bridges considering water–structure interaction: A state‐of‐the‐art review

Zheng

et al. 2022

Earthquake Engineering and Resilience

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Deep‐water bridges are susceptible to severe damages under strong earthquakes. Water–structure interaction will considerably affect the dynamic performance of deep‐water bridges. In the past few decades, researchers have conducted extensive studies on the water–structure interaction and dynamic behavior of bridges through theoretical, numerical, and experimental investigations. This paper presents a comprehensive review on the calculation method for earthquake and wave‐induced hydrodynamic forces. The seismic responses of deep‐water bridges under individual or combined excitation of earthquake, wave, and current are discussed to explore the influence of water–structure interaction on the seismic capacity of deep‐water bridges. Finally, the development of testing facilities that can simulate the water–structure interaction is summarized. Particularly, a new multifunctional dual underwater shaking table system built‐in Tianjin University that can simulate multiple‐support excitation and water–structure interaction simultaneously is introduced in detail for the first time.

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Shake Table Tests of Tall-Pier Bridges to Evaluate Seismic Performance

Cited by 65 publications

References 12 publications

Seismic Damage Model of Bridge Piers Subjected to Biaxial Loading Considering the Impact of Energy Dissipation

Seismic Damage Model of Bridge Piers Subjected to Biaxial Loading Considering the Impact of Energy Dissipation

Dynamic response of long-span continuous curved box girder bridge under seismic excitation

Seismic analysis and test facilities of deep‐water bridges considering water–structure interaction: A state‐of‐the‐art review

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