Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge
It is difficult to incorporate multidimensional effect of the ground motion in the design and response analysis of structures. The motion trajectory in the corresponding multi-dimensional space results in time variant principal axes of the motion and defies any meaningful definition of directionalit...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2011/536171 |
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| _version_ | 1832564029391896576 |
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| author | Swagata Banerjee Basu Masanobu Shinozuka |
| author_facet | Swagata Banerjee Basu Masanobu Shinozuka |
| author_sort | Swagata Banerjee Basu |
| collection | DOAJ |
| description | It is difficult to incorporate multidimensional effect of the ground motion in the design and response analysis of structures. The motion trajectory in the corresponding multi-dimensional space results in time variant principal axes of the motion and defies any meaningful definition of directionality of the motion. However, it is desirable to consider the directionality of the ground motion in assessing the seismic damageability of bridges which are one of the most vulnerable components of highway transportation systems. This paper presents a practice-oriented procedure in which the structure can be designed to ensure the safety under single or a pair of independent orthogonal ground motions traveling horizontally with an arbitrary direction to structural axis. This procedure uses nonlinear time history analysis and accounts for the effect of directionality in the form of fragility curves. The word directionality used here is different from “directivity” used in seismology to mean a specific characteristic of seismic fault movement. |
| format | Article |
| id | doaj-art-222d8129670241dcbf3b3057d42a3bbb |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-222d8129670241dcbf3b3057d42a3bbb2025-02-03T01:11:59ZengWileyAdvances in Civil Engineering1687-80861687-80942011-01-01201110.1155/2011/536171536171Effect of Ground Motion Directionality on Fragility Characteristics of a Highway BridgeSwagata Banerjee Basu0Masanobu Shinozuka1Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, USADepartment of Civil and Environmental Engineering, University of California, Irvine, CA 92697, USAIt is difficult to incorporate multidimensional effect of the ground motion in the design and response analysis of structures. The motion trajectory in the corresponding multi-dimensional space results in time variant principal axes of the motion and defies any meaningful definition of directionality of the motion. However, it is desirable to consider the directionality of the ground motion in assessing the seismic damageability of bridges which are one of the most vulnerable components of highway transportation systems. This paper presents a practice-oriented procedure in which the structure can be designed to ensure the safety under single or a pair of independent orthogonal ground motions traveling horizontally with an arbitrary direction to structural axis. This procedure uses nonlinear time history analysis and accounts for the effect of directionality in the form of fragility curves. The word directionality used here is different from “directivity” used in seismology to mean a specific characteristic of seismic fault movement.http://dx.doi.org/10.1155/2011/536171 |
| spellingShingle | Swagata Banerjee Basu Masanobu Shinozuka Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge Advances in Civil Engineering |
| title | Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge |
| title_full | Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge |
| title_fullStr | Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge |
| title_full_unstemmed | Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge |
| title_short | Effect of Ground Motion Directionality on Fragility Characteristics of a Highway Bridge |
| title_sort | effect of ground motion directionality on fragility characteristics of a highway bridge |
| url | http://dx.doi.org/10.1155/2011/536171 |
| work_keys_str_mv | AT swagatabanerjeebasu effectofgroundmotiondirectionalityonfragilitycharacteristicsofahighwaybridge AT masanobushinozuka effectofgroundmotiondirectionalityonfragilitycharacteristicsofahighwaybridge |