Journal
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
Volume 9, Issue 4, Pages 401-413Publisher
SPRINGER
DOI: 10.1007/s40069-015-0119-2
Keywords
progressive collapse; beam-column sub-assemblage; catenary action; side plates
Categories
Funding
- Architecture & Urban Development Research Program - Ministry of Land, Infrastructure and Transport of Korean government [13AUDP-B066083-01]
- Korea Agency for Infrastructure Technology Advancement (KAIA) [66080] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [22A20130011019] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study the progressive collapse resisting capacity of a RC beam-column subassemblage with and without strengthening was investigated. Total of five specimens were tested; two unreinforced specimens, the one designed as gravity load-resisting system and the other as seismic load-resisting system, and three specimens reinforced with: (i) bonded strand, (ii) unbonded strand, and (iii) side steel plates with stud bolts. The two-span subassemblages were designed as part of an eight-story RC building. Monotonically increasing load was applied at the middle column of the specimens and the force-displacement relationships were plotted. It was observed that the gravity load-resisting specimen failed by fractures of re-bars in the beams. In the other specimens no failure was observed until the maximum displacement capacity of the actuator was reached. Highest strength was observed in the structure with unbonded strand. The test result of the specimen with side steel plates in beam-column joints showed that the force-displacement curve increased without fracture of re-bars. Based on the test results it was concluded that the progressive collapse resisting capacity of a RC frame could be significantly enhanced using unbonded strands or side plates with stud bolts.
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