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Title |
Experimental Study on Bond Behavior of 1/12.5 Scale Model of the Steel Tubular Joint Connection Subjected to Compressive Loads
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DOI |
https://doi.org/10.11112/jksmi.2024.28.3.19 |
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Keywords |
고성능 시멘트계 그라우트; 전단키; 연결부; 풍력지지구조 High-performance cementeous grout; Shear key; Transition pieces; Wind tower support |
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Abstract |
In this study, the compressive behavior of a 1/12.5 scale model of a wind tower support structure connection was experimentally analyzed. A high-performance cementitious grout with a compressive strength of 140 MPa was used to fill the connection, and experiments were conducted with shear key spacing, the shape, and connection length as variables. When the number of shear keys in the connection is the same, the smaller the spacing of the shear keys than the length of the connection, the higher the shear strength, and for the same spacing and connection length, the higher the height of the shear keys, the higher the strength. In addition, it was found that the strength showed a linear behaviour until the connection slip reached 1.0 mm, and it reached the maximum strength at 7.0 mm connection slip showing a non-linear behaviour as the load increased. It was found that the failure mode changed from interfacial shear failure to grout failure as the strength increased according to the shape and spacing of the shear key, and brittle failure did not occur due to steel fibers.
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