Numerical simulation of damage evolution of Daikai station during the 1995 Kobe earthquake

Nguyễn, Văn Quảng; Nizamani, Zaheer Ahmed; Park, Duhee; Kwon, O’Dae

doi:10.1016/j.engstruct.2020.110180

Cited by 52 publications

(17 citation statements)

References 32 publications

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“…The final failure parts of the tunnel for each representative path are shown in Figure 11. The correlation coefficient matrices when λ = 1 and 2 are provided in Equations ( 18) and (19), respectively.…”

Section: Tunnel System Reliability Analysismentioning

confidence: 99%

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Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

2021

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The structural failure of a tunnel is a process that evolves from local damage to overall destruction. The system reliability analysis method can be useful for analyzing the evolutionary law of local structural failure. In many complex stress environments, the structural performance function may be very complicated or even impossible to solve. This paper establishes a response surface function to represent the implicit tunnel performance function. The reliability of the shear capacity of a tunnel is considered. The critical parts and critical failure paths of the tunnel system are determined using the β-unzipping method. Failure evolution is analyzed to obtain the failure process of the tunnel system. Different failure modes are shown under different cases. Based on the partial failure probability and impact on the tunnel system, the risk levels of the critical parts at each stage of the failure history are evaluated. Therefore, the tunnel failure tree model obtained by combining the response surface method and β-unzipping method plays an important role in tunnel reliability evolution, and can evaluate tunnel safety comprehensively.

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Section: Tunnel System Reliability Analysismentioning

confidence: 99%

“…Structure failure is a process that evolves from local damage to overall destruction [13,14]. Different initial damage causes different failure processes [15][16][17][18][19][20]. The system reliability theory can analyze the reliability evolution of different failure modes [8,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

2021

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“…One-dimensional equivalent linear (EQL) and nonlinear (NL) response analysis is performed using DEEPSOIL v7.0 [22] in this study. is program has been widely used in previous studies [7,16,[23][24][25][26]. One-dimensional site response analysis is the process of propagating shear waves numerically from the reference rock through the overlying soil layers to the surface.…”

Section: One-dimensional Ground Response Analysismentioning

confidence: 99%

Evaluation of Seismic Site Amplification Using 1D Site Response Analyses at Ba Dinh Square Area, Vietnam

Tran

Aaqib

Nguyen

et al. 2021

Advances in Civil Engineering

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This study presents a case study on ground response analysis of one of the important cultural heritages in Hanoi, Vietnam. One-dimensional nonlinear and equivalent linear site response analyses which are commonly applied to solve the problem of seismic stress wave propagation are performed at the Ba Dinh square area. A measured in-situ shear wave velocity profile and corresponding geotechnical site investigation and laboratory test data are utilized to develop the site model for site-specific ground response analysis. A suite of earthquake records compatible with Vietnamese Design Code TCVN 9386: 2012 rock design spectrum is used as input ground motions at the bedrock. A few concerns associated with site-specific ground response evaluation are analyzed for both nonlinear and equivalent linear procedures, including shear strains, mobilized shear strength, and peak ground acceleration along with the depth. The results show that the mean maximum shear strains at any soil layer are less than 0.2% in the study area. A deamplification portion within the soil profile is observed at the layer interface with shear wave velocity reversal. The maximum peak ground acceleration (PGA) at the surface is about 0.2 g for equivalent linear analysis and 0.16 g for nonlinear analysis. The ground motions are amplified near the site natural period 0.72 s. The soil factors calculated in this study are 1.95 and 2.07 for nonlinear and equivalent linear analyses, respectively. These values are much different from the current value of 1.15 for site class C in TCVN 9386: 2012. A comparison of calculated response spectra and amplification factors with the local standard code of practice revealed significant discrepancies. It is demonstrated that the TCVN 9386: 2012 soil design spectrum is unable to capture the calculated site amplification in the study area.

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“…In other words, the underground structure could be much safer due to the center column has been born partial load. However, the vertical bearing capacity of the column was affected by the horizontal deformation [5].…”

Section: Designed Analysis Of Corbelmentioning

confidence: 99%

“…At present, precast underground structures are characterized by relatively complex conditions in terms of large-scale, complication, and diversified, which are different from that of aboveground structures. Moreover, the seismic performance of the underground structure is not as safe as one thought, which has been validated against the damages of some tunnels and stations [4,5]. erefore, the seismic behavior of underground structures should be first validated against the experimental results before they were applied.…”

Section: Introductionmentioning

confidence: 99%

Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

Liu

Kong

2021

Advances in Civil Engineering

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To improve the construction efficiency of precast structures, reinforced concrete corbels acted as support members are the most common connection method. This work presents the performance of a specific beam-to-column connection using corbels with different anchorage arrangements in precast beam-slab-column interior joint taken out from precast underground subway station. This paper investigates the performance of a specific full-scale precast concrete beam-slab-column interior joint with corbels and various connected methods subjected to low-cycle repeated loading. Meanwhile, the influences of concrete corbels (including column- and beam-end corbels) on the shear strength and deformation are investigated. The analyses results indicated that (1) corbels of the laminated beam (composite beam) can obviously improve the shear stress of the core region, which was beneficial for specimen design followed the strong-joint-weak-member concept; (2) a simplified approach to deal with the uneven thickness of corbels in the core region was proposed, which was utilized to study the effect of thickness on the shear performance of the core region; (3) the shear stress increased with respect to the compression stress, and the shear strain had a trend of decreasing according to calculating results using modified compression field theory; and (4) the deterministic expressions were proposed to predict the designed load of column corbels based on three different connection methods between laminated beams and core region of joint.

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Numerical simulation of damage evolution of Daikai station during the 1995 Kobe earthquake

Cited by 52 publications

References 32 publications

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

Tunnel Failure Evolution and System Reliability Analysis Based on the β-unzipping Method

Evaluation of Seismic Site Amplification Using 1D Site Response Analyses at Ba Dinh Square Area, Vietnam

Influence of Precast Member Corbels on Seismic Performance of Precast Beam‐Slab‐Column Joints

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