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

这项研究可分为两大类。一个是进行检查的力学行为的框架，每个连接到不同类型的柱脚，另一个是那些暴露部分的锚螺栓受到联合拉伸和剪切。从这项研究中，澄清了以下几点。*不同柱脚形式的框架的力学性能在所有柱脚形式的框架中，随着轴压的增大，框架的强度和刚度都增大，滞回线面积也增大。但是，柱脚充分嵌入基础梁的框架不会出现这种下降。嵌入式柱脚和嵌入式柱脚的端部固定的明显点分别位于外壳的中间高度和基础梁顶部以下1.3倍管尺寸的点。*拉剪复合作用下锚栓外露部分的力学特性当受剪时，穿过灌浆层的锚栓的极限承载力略有下降，与普通结构螺栓相比，由于砂浆的分离，这种螺栓表现出很大的变形。当剪切面位于承受重复载荷的锚栓螺纹内时，与承受单调荷载的情况相比，它们的承载力下降，而位移增加得更多，由《钢管结构设计和制造建议》中的公式给出的受拉和受剪联合作用的极限承载力一般是比较安全的下

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)。

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）

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。

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。