Comparative analysis of different types of damage indexes of coastal bridges based on time-varying seismic fragility

Yan, Jialei; Guo, Anxin; Li, Hui

doi:10.1016/j.marstruc.2022.103288

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…3.2 Determination of damage indicators 3.2.1 Bending moment curvature analysis. Curvature ductility coefficient was used as the main damage indicator for columns in relevant domestic and international fragility analyses (Yan et al, 2022;Hwang et al, 2001;Liang et al, 2021). Prefabricated columns have two crosssectional properties: plain RC and sleeve cross-sections.…”

Section: Seismic Fragility Of Prefabricated Columnsmentioning

confidence: 99%

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Study on seismic fragility of prefabricated columns connected by grouted sleeves based on IDA method

Wang,

Jia,

Zhao

2024

IJSI

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PurposePrefabricated columns connected by grouted sleeves are increasingly used in practical projects. However, seismic fragility analyses of such structures are rarely conducted. Seismic fragility analysis has an important role in seismic hazard evaluation. In this paper, the seismic fragility of sleeve connected prefabricated column is analyzed.Design/methodology/approachA model for predicting the seismic demand on sleeve connected prefabricated columns has been created by incorporating engineering demand parameters (EDP) and probabilities of seismic failure. The incremental dynamics analysis (IDA) curve clusters of this type of column were obtained using finite element analysis. The seismic fragility curve is obtained by regression of Exponential and Logical Function Model.FindingsThe IDA curve cluster gradually increased the dispersion after a peak ground acceleration (PGA) of 0.3 g was reached. For both columns, the relative displacement of the top of the column significantly changed after reaching 50 mm. The seismic fragility of the prefabricated column with the sleeve placed in the cap (SPCA) was inadequate.Originality/valueThe sleeve was placed in the column to overcome the seismic fragility of prefabricated columns effectively. In practical engineering, it is advisable to utilize these columns in regions susceptible to earthquakes and characterized by high seismic intensity levels in order to mitigate the risk of structural damage resulting from ground motion.

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Section: Seismic Fragility Of Prefabricated Columnsmentioning

confidence: 99%

“…Curvature ductility coefficient was used as the main damage indicator for columns in relevant domestic and international fragility analyses (Yan et al. , 2022; Hwang et al.…”

Section: Grouting Sleeve Connection Prefabricated Column Collapse Jud...mentioning

confidence: 99%

Study on seismic fragility of prefabricated columns connected by grouted sleeves based on IDA method

Wang,

Jia,

Zhao

2024

IJSI

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“…2.4.2 Carbonation of concrete. At present, the influence of carbonization on the strength of concrete materials is mainly considered in the research on the time-varying seismic performance of bridges (Liang et al, 2021(Liang et al, , 2022Yan et al, 2022;Zhong et al, 2023), while the influence of chloride ions on concrete materials is ignored. Therefore, this paper analyses the change in concrete properties caused by carbonization concerning the existing research.…”

Section: 4mentioning

confidence: 99%

Time-varying seismic resilience analysis of coastal bridges by considering multiple durability damage factors

Liang

Wei

et al. 2023

IJSI

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PurposeFor coastal bridges, the ability to recover traffic functions after the earthquake has crucial implications for post-disaster reconstruction, which makes resilience become a significant index to evaluate the seismic behavior. However, the deterioration of the material is particularly prominent in coastal bridge, which causes the degradation of the seismic behavior. As far, the research studies on resilience of coastal bridges considering multiple degradation factors and different disaster prevention capability are scarce. For further evaluating the seismic behavior of coastal bridge in the long-term context, the seismic resilience is conducted in this paper with considering multiple durability damage.Design/methodology/approachThe fuzzy theory and time-varying fragility analysis are combined in this paper to obtain the life-cycle resilience of coastal bridges.FindingsThe results show that durability damage has a remarkable impact on the resilience. After 100 years of service, the seismic resilience of bridge with poor disaster-prevention capability has greatest reduction, about 18%. In addition, the improvement of the disaster prevention capability can stabilize the resilience of the bridge at a higher level.Originality/valueIn this paper, the time-varying fragility analysis of case bridge are evaluated with considering chloride ion erosion and concrete carbonization, firstly. Then, combining fuzzy theory and fragility analysis, the triangular fuzzy values of resilience parameters under different service period are obtained. Finally, the life-cycle resilience of bridge in different disaster prevention capability is analyzed.

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“…During the experiments, the amplitudes of the original earthquake records were modulated within the range of 0.1−0.7 g (PGA) to consider the randomness of the earthquake according to the concept of the incremental dynamic analysis (IDA) method. [43][44][45][46] Subsequently, three groups of 21 ground motions were generated based on the original earthquake records described above (Figure 6).…”

Section: Test Programmentioning

confidence: 99%

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

Yan

Liu

et al. 2023

Earthq Engng Struct Dyn

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This study experimentally investigates a dynamic behavior of an end-anchored floating bridge under the joint actions of earthquakes and water waves. A truncated model with a geometrical scale of 1:100 was utilized for the hydrodynamic test, and an actuator was used to generate the earthquake input. A series of trials were conducted for the floating bridge model under the combined action of two different sea states and three earthquake inputs with increasing intensity based on the concept of the incremental dynamic analysis method. For comparison, the dynamic responses of the floating bridge model under earthquake action in still water and pure wave action were also conducted. Based on the test data, the dynamic responses, particularly focused on the sway, heave, roll, and pitch motions of the pontoons, of the test model were experimentally analyzed. The experimental results showed that earthquake excitation along the longitudinal axis of the bridge girder would induce noticeable oscillation of the bridge pontoons in still water. The magnitude of the coupled effects of earthquakes and water waves is dependent on the intensity of the earthquake inputs and the sea state.

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Comparative analysis of different types of damage indexes of coastal bridges based on time-varying seismic fragility

Cited by 9 publications

References 23 publications

Study on seismic fragility of prefabricated columns connected by grouted sleeves based on IDA method

Study on seismic fragility of prefabricated columns connected by grouted sleeves based on IDA method

Time-varying seismic resilience analysis of coastal bridges by considering multiple durability damage factors

Experimental study on the dynamic responses of the end‐anchored floating bridge subjected to joint actions of earthquakes and water waves

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