Dynamic disproportionate collapse in flat-slab structures
Disproportionate collapse of structures can lead to catastrophic economic loss and casualties, and thus, it is of utmost concern to mitigate the risks of such events. Flat-slab structures are much more vulnerable to disproportionate collapse than moment-frame structures as there are no beams to re...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/98571 http://hdl.handle.net/10220/24041 |
| _version_ | 1811686726691717120 |
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| author | Qian, Kai Li, Bing |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Qian, Kai Li, Bing |
| author_sort | Qian, Kai |
| collection | NTU |
| description | Disproportionate collapse of structures can lead to catastrophic economic loss and casualties, and thus, it is of utmost concern to
mitigate the risks of such events. Flat-slab structures are much more vulnerable to disproportionate collapse than moment-frame structures as
there are no beams to redistribute the loads initially resisted by the lost column. Moreover, the propagation of punching-shear failure at slab–
column connections due to load redistribution may result in the collapse of the entire slab. Thus, increased attentions should be paid toward
assessing the disproportionate collapse performance of flat-slab structures. However, to date, limited knowledge exists regarding the risks of
disproportionate collapse in flat-slab structures, especially in terms of dynamic tests. For this purpose, a series of one-third-scaled flat-slab
substructures were subjected to the simulated sudden-column-removal scenario and the failure mode, acceleration, and displacement responses
were presented and discussed. To attain a deeper understanding of the dynamic load–redistribution capacity of flat-slab structures,
numerical and parametric analyses were also carried out. The possible load-resisting mechanism (membrane action, postpunching behavior,
and flexural strength) of flat-slab structures to mitigate disproportionate collapse is also discussed. |
| first_indexed | 2024-10-01T05:05:00Z |
| format | Journal Article |
| id | ntu-10356/98571 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:05:00Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/985712020-03-07T11:43:29Z Dynamic disproportionate collapse in flat-slab structures Qian, Kai Li, Bing School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Structures and design Disproportionate collapse of structures can lead to catastrophic economic loss and casualties, and thus, it is of utmost concern to mitigate the risks of such events. Flat-slab structures are much more vulnerable to disproportionate collapse than moment-frame structures as there are no beams to redistribute the loads initially resisted by the lost column. Moreover, the propagation of punching-shear failure at slab– column connections due to load redistribution may result in the collapse of the entire slab. Thus, increased attentions should be paid toward assessing the disproportionate collapse performance of flat-slab structures. However, to date, limited knowledge exists regarding the risks of disproportionate collapse in flat-slab structures, especially in terms of dynamic tests. For this purpose, a series of one-third-scaled flat-slab substructures were subjected to the simulated sudden-column-removal scenario and the failure mode, acceleration, and displacement responses were presented and discussed. To attain a deeper understanding of the dynamic load–redistribution capacity of flat-slab structures, numerical and parametric analyses were also carried out. The possible load-resisting mechanism (membrane action, postpunching behavior, and flexural strength) of flat-slab structures to mitigate disproportionate collapse is also discussed. 2014-10-15T03:55:22Z 2019-12-06T19:56:59Z 2014-10-15T03:55:22Z 2019-12-06T19:56:59Z 2014 2014 Journal Article Qian, K., & Li, B. (2014). Dynamic disproportionate collapse in flat-slab structures. Journal of performance of constructed facilities, B4014005-12. https://hdl.handle.net/10356/98571 http://hdl.handle.net/10220/24041 10.1061/(ASCE)CF.1943-5509.0000680 en Journal of performance of constructed facilities © 2014 American Society of Civil Engineers. 12 p. |
| spellingShingle | DRNTU::Engineering::Civil engineering::Structures and design Qian, Kai Li, Bing Dynamic disproportionate collapse in flat-slab structures |
| title | Dynamic disproportionate collapse in flat-slab structures |
| title_full | Dynamic disproportionate collapse in flat-slab structures |
| title_fullStr | Dynamic disproportionate collapse in flat-slab structures |
| title_full_unstemmed | Dynamic disproportionate collapse in flat-slab structures |
| title_short | Dynamic disproportionate collapse in flat-slab structures |
| title_sort | dynamic disproportionate collapse in flat slab structures |
| topic | DRNTU::Engineering::Civil engineering::Structures and design |
| url | https://hdl.handle.net/10356/98571 http://hdl.handle.net/10220/24041 |
| work_keys_str_mv | AT qiankai dynamicdisproportionatecollapseinflatslabstructures AT libing dynamicdisproportionatecollapseinflatslabstructures |