Shear Tests of Deep Hollow Core Slabs Strengthened by Core-Filling
Autor: | Min-Kook Park, Sun-Jin Han, Kang Su Kim, Hyo-Eun Joo |
---|---|
Rok vydání: | 2020 |
Předmět: |
shear strengthening method
composite performance Materials science Shear force 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology lcsh:Technology 0201 civil engineering lcsh:Chemistry Flexural strength 021105 building & construction core-filling method General Materials Science prestressed hollow core slab web-shear strength Composite material lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes Hollow core lcsh:T Process Chemistry and Technology General Engineering Shear resistance Shear reinforcement lcsh:QC1-999 Experimental research Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 Shear (geology) lcsh:TA1-2040 lcsh:Engineering (General). Civil engineering (General) lcsh:Physics |
Zdroj: | Applied Sciences, Vol 10, Iss 5, p 1709 (2020) Applied Sciences Volume 10 Issue 5 |
ISSN: | 2076-3417 |
Popis: | Prestressed hollow core slabs (PHCSs) have commonly been applied to long-span structures, due to their excellent flexural capacity and deflection control performance. However, in quite a few cases, the web-shear strength at member ends subjected to high shear forces is insufficient, because the web of the PHCS is very thin, making it difficult to place shear reinforcement, and the prestress is not fully effective in transfer length regions. Accordingly, a variety of shear strengthening methods have been proposed to improve the web-shear strength of PHCS ends. In this study, experimental research was conducted to investigate the shear resistance mechanism of PHCS strengthened by core-filling method, which has been most widely used in the construction field. The number of filled cores and the shear reinforcement ratio were set as the main test variables, and the patterns and angles of shear cracks that occurred in the PHCS units and filled cores, respectively, and the strain behavior of the shear reinforcement, were measured and analyzed in detail. This study also analyzed the test results based on the current design codes, and proposed a modified shear strength equation that can be applied to the core-filled PHCS. |
Databáze: | OpenAIRE |
Externí odkaz: |