A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic fragility assessment for cantilever retaining walls with various backfill slopes in South Korea
https://orcid.org/0000-0002-3290-7163
Abstract We evaluate seismic fragilities for cantilever retaining walls with three slope angles of backfill (i.e., 0, 10°, and 20°), subjected to the ground motions computed for four site classes (S2, S3, S4, and S5). We collect measured shear wave velocity profiles and select representative profiles. Using one-dimensional site response analyses, surface ground motions are computed corresponding to various site conditions. Numerical models are developed for a cantilever retaining wall with a height of 4 m using the FLAC2D software, and are verified by a comparison with an analytical solution. We analyze the correlations between the seismic behavior of the retaining wall and various ground motion parameters. A probabilistic seismic demand model is introduced to calculate the probabilities of exceeding three limit states of retaining walls, based on the relative wall displacements and settlements of the backfills. We propose a suite of seismic fragility curves which are functions of either the peak ground acceleration (PGA) or cumulative absolute velocity (CAV). In addition, we propose a suite of seismic fragility surfaces using dual ground motion parameters (PGA and CAV). The results highlight that the backfill slope angle and ground motion characteristics have a primary influence on the probabilities. When the backfill slope angle increases from 0 to 20°, the probabilities of exceeding the three limit states increase by up to approximately 1.7, 4.0, and 8.5 times, respectively. Additionally, the probabilities for S3 ground motions with a PGA of 0.4 g are higher than those for S2 motions with the same PGA by up to approximately 5, 16, and 36 times, respectively.
Highlights Seismic fragility of a retaining wall with backfill slope angles is assessed. Effects of ground motion characteristics in South Korea are discussed. The cumulative absolute velocity greatly influences behaviors of a retaining wall. A total of 24 sets of fragility curves and surfaces are developed.
Seismic fragility assessment for cantilever retaining walls with various backfill slopes in South Korea
https://orcid.org/0000-0002-3290-7163
Abstract We evaluate seismic fragilities for cantilever retaining walls with three slope angles of backfill (i.e., 0, 10°, and 20°), subjected to the ground motions computed for four site classes (S2, S3, S4, and S5). We collect measured shear wave velocity profiles and select representative profiles. Using one-dimensional site response analyses, surface ground motions are computed corresponding to various site conditions. Numerical models are developed for a cantilever retaining wall with a height of 4 m using the FLAC2D software, and are verified by a comparison with an analytical solution. We analyze the correlations between the seismic behavior of the retaining wall and various ground motion parameters. A probabilistic seismic demand model is introduced to calculate the probabilities of exceeding three limit states of retaining walls, based on the relative wall displacements and settlements of the backfills. We propose a suite of seismic fragility curves which are functions of either the peak ground acceleration (PGA) or cumulative absolute velocity (CAV). In addition, we propose a suite of seismic fragility surfaces using dual ground motion parameters (PGA and CAV). The results highlight that the backfill slope angle and ground motion characteristics have a primary influence on the probabilities. When the backfill slope angle increases from 0 to 20°, the probabilities of exceeding the three limit states increase by up to approximately 1.7, 4.0, and 8.5 times, respectively. Additionally, the probabilities for S3 ground motions with a PGA of 0.4 g are higher than those for S2 motions with the same PGA by up to approximately 5, 16, and 36 times, respectively.
Highlights Seismic fragility of a retaining wall with backfill slope angles is assessed. Effects of ground motion characteristics in South Korea are discussed. The cumulative absolute velocity greatly influences behaviors of a retaining wall. A total of 24 sets of fragility curves and surfaces are developed.
Seismic fragility assessment for cantilever retaining walls with various backfill slopes in South Korea
https://orcid.org/0000-0002-3290-7163
Abstract We evaluate seismic fragilities for cantilever retaining walls with three slope angles of backfill (i.e., 0, 10°, and 20°), subjected to the ground motions computed for four site classes (S2, S3, S4, and S5). We collect measured shear wave velocity profiles and select representative profiles. Using one-dimensional site response analyses, surface ground motions are computed corresponding to various site conditions. Numerical models are developed for a cantilever retaining wall with a height of 4 m using the FLAC2D software, and are verified by a comparison with an analytical solution. We analyze the correlations between the seismic behavior of the retaining wall and various ground motion parameters. A probabilistic seismic demand model is introduced to calculate the probabilities of exceeding three limit states of retaining walls, based on the relative wall displacements and settlements of the backfills. We propose a suite of seismic fragility curves which are functions of either the peak ground acceleration (PGA) or cumulative absolute velocity (CAV). In addition, we propose a suite of seismic fragility surfaces using dual ground motion parameters (PGA and CAV). The results highlight that the backfill slope angle and ground motion characteristics have a primary influence on the probabilities. When the backfill slope angle increases from 0 to 20°, the probabilities of exceeding the three limit states increase by up to approximately 1.7, 4.0, and 8.5 times, respectively. Additionally, the probabilities for S3 ground motions with a PGA of 0.4 g are higher than those for S2 motions with the same PGA by up to approximately 5, 16, and 36 times, respectively.
Highlights Seismic fragility of a retaining wall with backfill slope angles is assessed. Effects of ground motion characteristics in South Korea are discussed. The cumulative absolute velocity greatly influences behaviors of a retaining wall. A total of 24 sets of fragility curves and surfaces are developed.
Seismic fragility assessment for cantilever retaining walls with various backfill slopes in South Korea
Seo, Hwanwoo (author) / Lee, Young-Joo (author) / Park, Duhee (author) / Kim, Byungmin (author)
2022-07-10
Article (Journal)
Electronic Resource
English
Seismic motion response and fragility analyses of cantilever retaining walls with cohesive backfill
| British Library Online Contents | 2018
Seismic motion response and fragility analyses of cantilever retaining walls with cohesive backfill
| British Library Online Contents | 2018
Seismic motion response and fragility analyses of cantilever retaining walls with cohesive backfill
| British Library Online Contents | 2018
| British Library Conference Proceedings | 2018