DESIGN METHOD OF DAMPER CONNECTIONS BY POST-TENSIONED CONNECTION UTILIZING DUCTILE CAST IRON PLATE WITH SHEAR-KEY AND EXPERIMENTAL VERIFICATION OF RC FRAME WITH DAMPERS

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  • 突起付き鋳鉄製プレート圧着接合法を用いたダンパー接合部設計法の提案とダンパーを組み込んだRCフレーム実験による検証
  • 突起付き鋳鉄製プレート圧着接合法を用いたダンパー接合部設計法の提案とダンパーを組み込んだRCフレーム実験による検証 : 突起付き鋳鉄製プレート圧着接合法を用いたコンクリート系構造物へのダンパー適用に関する研究(その2)
  • トッキ ツキ チュウテツセイ プレート アッチャク セツゴウホウ オ モチイタ ダンパー セツゴウブ セッケイホウ ノ テイアン ト ダンパー オ クミコンダ RC フレーム ジッケン ニ ヨル ケンショウ : トッキ ツキ チュウテツセイ プレート アッチャク セツゴウホウ オ モチイタ コンクリートケイ コウゾウブツ エ ノ ダンパー テキヨウ ニ カンスル ケンキュウ(ソノ 2)
  • －Applications of dampers in concrete composite structures by post-tensioned connection utilizing ductile cast iron plate with shear-key Part 2－
  • －突起付き鋳鉄製プレート圧着接合法を用いたコンクリート系構造物へのダンパー適用に関する研究　その2－

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<p> Some indirect joints use shear resistance elements such as studs and mortar as a connecting method for concrete structures and dampers. However, the authors are using a post-tensioned connection utilizing a ductile cast iron plate with shear-key as a connecting method for concrete structures and dampers, and they are studying the behavior of the connections. The post-tensioned connection utilizing a ductile cast iron plate with shear-key has a higher rigidity and shear strength than the general indirect method. The purpose of this study was to establish a design method for applying dampers to concrete structures by using a post-tensioned connection utilizing a ductile cast iron plate with shear-key.</p><p> In this paper, the connection design method was examined from the results of additional component tests and the results of previous studies. In addition, a reinforced concrete (RC) frame with dampers was tested using the connection design method.</p><p> From the additional component tests and previous studies, the strength of the specimen of shear-key with solid section could be calculated as the sum of friction resistance and bearing resistance. As for the bearing resistance of the specimen of shear-key with a hollow section, the test results were generally evaluated by considering the bearing resistance of the concrete outside the shear-key and the shear strength of the columnar concrete inside the shear-key. Here, the shear strength of the columnar concrete inside the shear-key was based on the shear stress resistance of the columnar concrete shear key under the compressive stress reported in the previous study. By the summation of the bearing strength formula and the friction resistance, the shear strength of the connection could be calculated as well. Based on the results of the above component tests and the results of previous studies, a damper connection design method was proposed.</p><p> Finally, the RC frame with dampers was tested using the connection design method. A buckling restrained brace (BRB) was used for the damper. The parameters of the specimen were the damper connection type and the presence or absence of hinge relocation for RC beams. The test results showed that BRBs started to dissipate energy at an early stage with story drift ratios much smaller than those for RC frame yielding. The displacement of the damper connection was within 0.3 mm, and there was no displacement that affected the behavior of the BRB. From the above results, the proposed damper connection design method was effective.</p>

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