Development of Mixed Column Base of Square CFT Structures Considering Constractability

考虑可施工性的方形CFT结构混合柱底座的研制

基本信息

批准号：
13555157
负责人：
MORINO Shosuke
金额：
$ 3.33万
依托单位：
Mie University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555157/
关键词：
Concrete Filled Steel Tube Column Base Cyclic Loading Maximum Strength Initial Stiffness Embedded Type Column Base Bare Type Column Base Semi-Embedded Type Column Base 繰り返し載荷実験埋込み型柱脚半埋込み型柱脚繰返し載荷実験半埋込み型型柱

项目摘要

In this paper, a new type of column base is produced of which the structural performance have been investigated experimentally, and the estimation of the maximum strength and initial stiffness is discussed. The idea of the proposed column base has been developed from the two conventional methods. The other is the bare type; the column is embedded into the reinforced concrete foundation beam with a certain length. The other is the bare type; the column is connected to the foundation beam by the anchor bolts and a base plate. The former shows the larger stiffness and strength, and the better structural performance, but the procedure of the construction is rather complicated ; the erection of the steel must be done before the concrete casting of the foundation beams. The latter has smaller stiffness and strength compared to the embedded type, but it is easy to construct, and the cost of construction is less. The semi-embedded type of CFT column base proposed in this paper.The research fin … More dings are as follows :1) Local buckling of the column tube did not much affect the behavior2) The hysteresis loops of specimens with longer embedded length showed the stable spindle shapes, but those with shorter length showed the pinched shape.3) The proposed calculation for the ultimate strength showed a good evaluation to the experimental values.4) The initial stiffness of a semi-embedded column base was provided into two resisting mechanisms; i) rotational stiffness by. the anchor bolts and base plate. The former shows the larger stiffness and strength, and the better structural performance, but the procedure of the construction is rather complicated; the erection of the steel must be done before the concrete casting of the foundation beams. The latter has smaller stiffness and strength compared to the embedded type, but it is easy to construct, and the cost of construction is less. The semi-embedded type of CFT column base proposed in this paper.The research findings are as follows :1) Local buckling of the column tube did not much affect the behavior2) The hysteresis loops of specimens with longer embedded length showed the stable spindle shapes, but those with shorter length showed the pinched shape.3) The proposed calculation for the ultimate strength showed a good evaluation to the experimental values.4) The initial stiffness of a semi-embedded column base was provided into two resisting mechanisms; i) rotational stiffness by the anchor bolts and base plate, ii) the sum of bending stiffness and prying resistance of reinforced concrete foundation beam.5) The initial stiffness provided by the mechanisms mentioned in 4) well estimated the experimental values. Less

在本文中，产生了一种新型的色谱柱基础，并通过实验研究了结构性能，并讨论了最大强度和初始刚度的估计。提出的柱基库的概念是从两种常规方法开发的。另一个是裸体类型；将色谱柱嵌入具有一定长度的钢筋混凝土基础梁中。另一个是裸体类型；柱通过锚螺栓和底板连接到基础梁。前者显示出较大的刚度和强度，以及更好的结构性能，但是结构的过程相当复杂。在基础梁的混凝土铸造之前，必须进行钢的洗脱。与嵌入式类型相比，后来具有较小的刚度和强度，但是易于构造，构造成本较小。本文提出的半被安装类型的CFT柱基础类型。研究鳍……更多的叮当声如下：1）局部圆柱管的局部屈曲不大影响行为2）嵌入式长度较长的样本的磁滞循环循环循环循环循环循环循环显示稳定的纺锤形形状，但具有较短长度显示的良好的固定型孔的强度。将半被安装的柱底座的初始刚度分为两个抵抗机制。 i）旋转刚度。锚螺栓和底板。前者显示出较大的刚度和强度，以及更好的结构性能，但是结构的过程相当复杂。在基础梁的混凝土铸造之前，必须进行钢的洗脱。与嵌入式类型相比，后来具有较小的刚度和强度，但是易于构造，构造成本较小。本文提出的半被安装类型的CFT柱基础类型。研究结果如下：1）圆柱管的局部屈曲不影响该行为2）样品的滞后循环均匀嵌入式长度显示较长的嵌入式长度，显示了稳定的纺锤形形状，但具有较短长度的最终范围为固定的强度。将半被安装的色谱柱底座提供为两个抵抗机制； i）锚螺栓和底板的旋转刚度，ii）弯曲刚度和钢筋混凝土粉底梁的易于抗性的总和。5）4）4）4）良好估计的实验值提供的初始刚度。较少的