Experimental research on residual bearing capacity of full-scale concrete-filled steel tubular column after explosion
- Publication Type:
- Journal Article
- Citation:
- Jianzhu Jiegou Xuebao/Journal of Building Structures, 2016, 37, (5), pp. 155-160
- Issue Date:
- 2016-05-05
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| Experimental ...ter explosion_王宏伟.pdf | Published version | 530.45 kB |
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The explosion test of four full-scale circular cross section and four full-scale square section concrete-filled steel tubular columns was researched. Applying axial pressure to four concrete-filled steel tubular columns with deflection-to-span ratio less than 1/100 after explosion, the residual bearing capacity of concrete-filled steel tubular column under blast loading was obtained. The strain variation of the concrete-filled steel tubular columns was analyzed. The load-strain curve of the circular concrete-filled steel tubular column has obvious yield plateau, indicating the circular concrete-filled steel tubular column has better ductility than square concrete-filled steel tubular column. After the test, six concrete-filled steel tubular columns were ripped (four specimens were tested for the residual bearing capacity while the other two components were not). The destruction performance of the circular and square concrete-filled steel tubular columns was studied before and after the residual bearing capacity test, showing consistent failure modes before and after the test. Using a unified theoretical formula which was modified by the task group, the damage degrees of the four specimens were assessed. Three specimens were damaged slightly, and one specimens was severely damaged, but no collapse occurred.
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