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Tensile behavior of post-installed chemical anchors embedded to low strength concrete
Highlights Analyzed parameters are bar diameter, embedment depth and free edge distance in low strength concrete under axial loading. Embedment depth and free edge distance must be at least 15times bar diameter for ductile behavior. ACI 318 recommendation uses very conservative approach for shallow anchors and larger bar sizes in low strength concrete. Putting an upper limit for bar diameter is proposed. Smaller ones are more suitable to ACI 318 for low strength concrete.
Abstract In the scope of this paper, tensile capacities of post-installed chemical anchors embedded to 5.9 and 10.9MPa concrete blocks are investigated. Pull-out tests are applied to 80 ductile steel bars (S420a). For the anchor diameters, 12, 16 and 20mm are chosen. On the other hand, 10, 15 and 20times the bar diameter are selected as free-edge distance and embedment depth for monotonic tensile loading tests. The results indicate that installation of anchors into low-strength concrete with sufficient embedment depth and free-edge distance is not unsafe as previously expected. To obtain ductile failure in low strength concrete, free-edge distance and embedment depth of minimum 15times the anchor diameter should be required. Furthermore, a comparison of test results with ACI 318 capacities is done and it is observed that ACI 318 has quite an over-conservative approach for the tensile capacity of post-installed anchors when low-strength concrete is considered.
Tensile behavior of post-installed chemical anchors embedded to low strength concrete
Highlights Analyzed parameters are bar diameter, embedment depth and free edge distance in low strength concrete under axial loading. Embedment depth and free edge distance must be at least 15times bar diameter for ductile behavior. ACI 318 recommendation uses very conservative approach for shallow anchors and larger bar sizes in low strength concrete. Putting an upper limit for bar diameter is proposed. Smaller ones are more suitable to ACI 318 for low strength concrete.
Abstract In the scope of this paper, tensile capacities of post-installed chemical anchors embedded to 5.9 and 10.9MPa concrete blocks are investigated. Pull-out tests are applied to 80 ductile steel bars (S420a). For the anchor diameters, 12, 16 and 20mm are chosen. On the other hand, 10, 15 and 20times the bar diameter are selected as free-edge distance and embedment depth for monotonic tensile loading tests. The results indicate that installation of anchors into low-strength concrete with sufficient embedment depth and free-edge distance is not unsafe as previously expected. To obtain ductile failure in low strength concrete, free-edge distance and embedment depth of minimum 15times the anchor diameter should be required. Furthermore, a comparison of test results with ACI 318 capacities is done and it is observed that ACI 318 has quite an over-conservative approach for the tensile capacity of post-installed anchors when low-strength concrete is considered.
Tensile behavior of post-installed chemical anchors embedded to low strength concrete
Yilmaz, Salih (author) / Özen, Muhammet Ali (author) / Yardim, Yavuz (author)
Construction and Building Materials ; 47 ; 861-866
2013-05-04
6 pages
Article (Journal)
Electronic Resource
English
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