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，生产了一种新型的柱基础，研究了结构性能，并设计了M.轴传输和初始刚度的估计。两种常规方法将圆柱嵌入一定长度的钢筋混凝土梁中。与嵌入式类型相比，粉底梁的混凝土铸造具有较小的条件和强度：1）圆柱管的局部屈曲不会影响稳定的纺锤形形状，但较短的GTH显示了缝制的形状。3）最终强度的支撑计算显示出对实验值的良好评估。4初始刚度一个半衬柱的baspo，旋转的刚度是锚固螺栓的固体。与嵌入式类型相比，TEEL必须在铸造梁和强度之前，但构造的成本较小。以下内容：1）局部屈曲管影响行为2）具有嵌入式长度的标本的磁滞回路显示稳定的纺锤形形状，但Thorter的长度显示出捏合的形状。3）3）最终强度的支撑物显示出良好的评估，可用于实现您的实用性实现您的实用性的有效性。值4）半被安装的柱基底座的初始刚度被锚固螺栓和基板的旋转刚度，ii）精神中的机制提供的初始刚度值。