Seismic Vulnerability Assessment of a Shallow Two-Story Underground RC Box Structure
Abstract
:1. Introduction
2. Analytical Procedure for Constructing Fragility Curves
2.1. Structural Analysis Using GRAMBS
2.2. Definition of Damage State of Underground Subway Station
3. Fragility Curve Development
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Soil Layer | Unit | Sandy | Weathered Soil | Rock |
---|---|---|---|---|
Mass density | kg/m3 | 1800 | 2000 | 2300 |
Shear wave velocity | m/s | 275 | 500 | 1500 |
Poisson’s ratio | - | 0.35 | 0.35 | 0.25 |
Thickness | m | 6.0 | 16.6 | - |
Random variables | Unit | Distribution | Mean | COV |
---|---|---|---|---|
Elastic modulus of concrete | GPa | Normal | 31.23 | 0.120 |
Poisson’s ratio of concrete | - | Normal | 0.17 | 0.050 |
Compression strength of concrete | MPa | Normal | 29.42 | 0.175 |
Concrete cover | mm | Normal | 78.00 | 0.145 |
Yield strength of steel | MPa | Log-normal | 400.00 | 0.093 |
Elastic modulus of steel | GPa | Log-normal | 199.95 | 0.033 |
Damage State | Types of Pseudo-Static Lateral Force | |
---|---|---|
Concentrated Load | Invert Distributed Load | |
No damage | DI ≤ 0.11% | DI ≤ 0.13% |
Minor | 0.11% < DI ≤ 0.36% | 0.13% < DI ≤ 0.36% |
Moderate | 0.36% < DI ≤ 0.88% | 0.36% < DI ≤ 0.90% |
Extensive | DI > 0.88% | DI > 0.90% |
PGA (g) | Concentrated | Distributed | ||||
---|---|---|---|---|---|---|
Minor | Moderate | Extensive | Minor | Moderate | Extensive | |
0.02 | 0 | - | - | 0 | - | - |
0.03 | 0 | - | - | 0 | - | - |
0.05 | 0 | - | - | 0 | - | - |
0.08 | 3 | - | - | 0 | - | - |
0.10 | 23 | - | - | 9 | - | - |
0.13 | 43 | - | - | 33 | - | - |
0.15 | 50 | - | - | 46 | - | - |
0.18 | 50 | 0 | - | 50 | 0 | - |
0.20 | 50 | 0 | - | 50 | 0 | - |
0.23 | 50 | 0 | - | 50 | 0 | - |
0.25 | - | 2 | - | - | 3 | - |
0.28 | - | 5 | - | - | 4 | - |
0.30 | - | 17 | - | - | 18 | - |
0.40 | - | 43 | 0 | - | 41 | 0 |
0.50 | - | 50 | 0 | - | 50 | 0 |
0.60 | - | 50 | 1 | - | 50 | 1 |
0.70 | - | 50 | 10 | - | 50 | 7 |
0.80 | - | - | 26 | - | - | 25 |
0.90 | - | - | 37 | - | - | 33 |
1.00 | - | - | 44 | - | - | 43 |
1.10 | - | - | 49 | - | - | 49 |
1.20 | - | - | 50 | - | - | 50 |
1.30 | - | - | 50 | - | - | 50 |
θ | 0.103 | 0.330 | 0.806 | 0.116 | 0.328 | 0.818 |
β | 0.164 | 0.157 | 0.158 | 0.161 | 0.161 | 0.157 |
Load Type | Concentrated Load | Invert Distributed Load | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Earthquakes per PGA | 10 | 20 | 30 | 40 | 50 | 10 | 20 | 30 | 40 | 50 | |
Minor | θ | 0.107 | 0.104 | 0.105 | 0.103 | 0.103 | 0.124 | 0.119 | 0.119 | 0.117 | 0.116 |
β | 0.148 | 0.146 | 0.137 | 0.142 | 0.164 | 0.167 | 0.168 | 0.162 | 0.162 | 0.161 | |
Moderate | θ | 0.351 | 0.337 | 0.338 | 0.328 | 0.330 | 0.351 | 0.337 | 0.336 | 0.327 | 0.328 |
β | 0.135 | 0.137 | 0.131 | 0.139 | 0.157 | 0.135 | 0.137 | 0.133 | 0.139 | 0.161 | |
Extensive | θ | 0.841 | 0.809 | 0.823 | 0.804 | 0.806 | 0.854 | 0.819 | 0.830 | 0.816 | 0.818 |
β | 0.148 | 0.147 | 0.148 | 0.155 | 0.158 | 0.130 | 0.142 | 0.145 | 0.151 | 0.157 |
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Huh, J.; Tran, Q.H.; Haldar, A.; Park, I.; Ahn, J.-H. Seismic Vulnerability Assessment of a Shallow Two-Story Underground RC Box Structure. Appl. Sci. 2017, 7, 735. https://doi.org/10.3390/app7070735
Huh J, Tran QH, Haldar A, Park I, Ahn J-H. Seismic Vulnerability Assessment of a Shallow Two-Story Underground RC Box Structure. Applied Sciences. 2017; 7(7):735. https://doi.org/10.3390/app7070735
Chicago/Turabian StyleHuh, Jungwon, Quang Huy Tran, Achintya Haldar, Innjoon Park, and Jin-Hee Ahn. 2017. "Seismic Vulnerability Assessment of a Shallow Two-Story Underground RC Box Structure" Applied Sciences 7, no. 7: 735. https://doi.org/10.3390/app7070735