Experimental Study on Deformability of Steel Column Base Connections

钢柱基础连接变形性能试验研究

• 批准号: 08650690
• 负责人: NAKASHIMA Shigetoshi
• 金额: $ 0.64万
• 依托单位: Osaka Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650690/
• 关键词: Anchor bolt; Combined teusion and shear; Hgsteresis loop; Inflection point; Grout layer; Shear plane; Inter action curve; Ultimate strength; 柱脚部; ベースプレート; 中ボルト; 組み合せ応力; 終局耐力; 変形性能; 露出型柱脚部; ピン柱脚; くり返し載荷; 単調載荷; 埋め込み柱脚; 固定度; アンカー筋; 柱軸力比

This study could be divided into two main groups. One was undertaken to examine the mechanical behavior of the frames each connected to different types of column bases, and the other was those of the exposed portions of anchor bolts subjected to combined tension and shear. From this study, the followings were clarified.*Mechanical behavior of frames each connected to different types of column bases In the frames connected to all types of column bases, the strength and rigidity of the frames became large and the area of the hysteresis loops becomes large, as the axial compression increases.The inflection points of the frames having exposed type or encased type column bases lower as the lateral force acting on them increases ; however, such lowering does not occur in the frames whose column bases are sufficiently embedded in foundation beams.The apparent points of end fixation of the encased type column bases and the embedded type column bases are located at the mid-height of the encasement and at a point 1.3 times the tube dimension below the top of the foundation beams respectively.*Mechanical characteristics of exposed portion of anchor bolts under combined tension and shear When subjected to shear, the ultimate capacity of anchor bolts placed through a grout layer shows slight decrease and such bolts show great deformation because of mortar separation compared with normal structural bolts.Where shear plane is located within the threads of the anchor bolts subjected to repeated loading, their capacities decrease and their displacements increase more substantially than in the case where they are subjected to monotonic loadings.The ultimate capacity under combined tesion and shear given by Equation shown in Recommendations for the Design and Fabrication of Tubular Structures in Steel is generally rather on the safe side under

这项研究可以分为两个主要组。一个被禁止检查每个连接到不同类型的柱底座的框架的机械行为，另一个是锚固螺栓的暴露部分的机械行为，该锚螺栓遇到了结合张力和剪切。从这项研究中，阐明了以下内容。但是，这种降低不会发生在其圆柱底部足够嵌入基础梁中的框架中。最终的固定点的明显固定点和嵌入式的柱底座的明显固定点位于封装的中期，并在固定型的固定型bots的最高点上，在1.3倍的位置上，将其结合起来。剪切，通过灌浆层放置的锚螺栓的最终能力显示出略有下降，由于与正常的结构螺栓相比，由于迫击炮的分离，因此剪切平面位于锚固螺栓内部的螺栓内部的螺栓螺栓内部的固定螺栓的重复载荷，其容量的降低和构成量更大，因此剪切平面位于锚固螺栓内部的锚螺栓内部，其固定螺栓的固定螺栓位于锚螺栓的螺栓内部，其在锚固量上的增加而增加，而在锚固螺栓的螺栓内部，其在造成的情况下会增加，而在造成的情况下，它们的组合量更大。在钢中设计和制造管状结构的建议中显示的方程式通常位于安全的一侧

项目成果

S.Nakashima: "Failures of Column Bases and Foundations in Steel Stractures under Seismic Forces" Lessons from Structural Failures. 6巻. 39-51 (1996)

S.Nakashima：“地震力下钢结构柱底座和基础的失效”结构失效的教训第 6 卷 39-51 (1996)。

S.Nakashima: "Mechanical Characteristics of Exosed Portions of Anchor Bolts in Steel Column Bases under Combined Tension and Shear" Proceedings of the 2nd World Conference on Steel in Construction. CD ROM Paper No.277. (1998)

S.Nakashima：“拉剪联合作用下钢柱底座锚栓外露部分的机械特性”第二届世界建筑钢大会论文集。

Y.Ohashi, S.Nakashima: "Experimental Study on Mechanical Behavior of Exposed Portious of Auchor Bolts under Combined Tension and Shear" Regional Congress Reports of Kinki Branch of AIJ. No.36. 285-288 (1996)

Y.Ohashi、S.Nakashima：“拉力和剪切力作用下锚定螺栓外露部分的机械行为实验研究”AIJ 近畿分会区域大会报告。

槇元 宏幸: "鋼構造柱脚部の接合形式が門型ラーメンの力学的性状に及ぼす影響について(その5)-定軸力を受ける場合について-" 日本建築学会近畿支部研究報告集. 36号. 289-292 (1996)

牧本博之：《论钢结构柱基础的节点类型对门形刚架力学性能的影响（第5部分）——关于承受恒定轴向力的情况——》日本建筑学会近畿分会研究报告， 36号。289-292（1996）

K.Yoshimori, S.Nakashima and H.Makimoto: "Influence of Piuned Column Bases on Mechanical Characteristics of Steel Portal Frames" Regional Congress Reports of Kinki Branch of AIJ. No.37. 233-236 (1997)

K.Yoshimori、S.Nakashima 和 H.Makimoto：“柱基对钢门式刚架机械特性的影响”AIJ 近畿分会区域大会报告。