Organic Cotton Fabric,Men'S Shirt Organic Fabric,Soft Organic Cotton Fabric,High Strength Organic Fabric Zhejiangxingyuanda Textile co.,ltd , https://www.xingyuandatex.com
The dumbbell-shaped section is one of the common forms of the cross-section of a concrete-filled steel tubular arch rib. When injecting peritoneal concrete of arch ribs, the webs are easily subjected to external drums due to the effect of concrete pressure. In severe cases, the welds at the joints between the steel tubes and the webs are pulled and cracked, causing explosions. At present, only the analysis of the explosion of a certain project has been conducted. However, a simplified processing was performed when the plane finite element model was established. In addition, it is an analysis of specific engineering accidents, and no analysis of other possible occurrences of concrete sequence in the infusion pipe is performed. For this reason, the author tried to establish a calculation model that is closer to the actual stress situation, and to conduct a comprehensive analysis of the possible construction conditions, so as to make the cross-section force of the concrete filled with concrete-filled steel tube dumbbell-shaped cross section more comprehensive and more comprehensive. For accurate understanding for engineering practice. The construction condition bookmark4 dumbbell-shaped section has two steel tubes and one abdominal cavity (3 cavities in total) that require concrete to be poured. When the construction is completed, the cavity is filled with the entire arch rib, and then another cavity is filled until the three cavities are completely filled. When pouring concrete, in general, the cross-sectional stress generated by the internal pressure of the pumped concrete is much greater than the stress caused by the concrete's own weight. To simplify the analysis. The author does not consider the influence of the concrete's own weight on the cross-section stress during the analysis. That is, the order of pouring of the upper and lower tubes can be interchanged. Ignore the analysis after the influence of weight. At the same time can be applied to horizontal dumbbell cross-section. In this way, there are three kinds of order in which the dumbbell-shaped concrete is poured into the concrete of the arch ribs, and there are three working conditions in each sequence, a total of nine working conditions, as shown. Same as condition 3-3. Therefore, completely independent conditions 7 take into account that the two tubes are separated by an abdominal cavity, so the force applied to the cross-section of the concrete when filling a certain tube is not related to whether the other tube is filled with concrete. -2 and conditions 2-1, conditions 3-2 and conditions 3-3 can be regarded as the same. Such conditions continue to be reduced to 5, ie conditions 1-1, 1-2, 1-3, 2-3, and 3-2. These five conditions can be divided into two categories: irrigation concrete and irrigation Inside concrete. In the following analysis, only these five conditions are discussed, namely: Absence of abdominal cavity and conditions 1-3 (intra-abdominal cavity filled with concrete). : Operating conditions 3-1 (two tubes empty), working conditions 1-2 (one tube has been filled with a tube empty) and working conditions 2-3 (two tubes have been filled). Ridge 丨 tube cavity 丨 tube 丨 ff S''-''- æ·· æ·· æ·· æ·· 况 ( ( - 况 况 况 拱 æ··å‡åœŸ æ··å‡åœŸ æ··å‡åœŸ book book book book book book book book book Rib section is used as an example m, as shown. The steel pipes and webs of the example section adopt Q34:5 steel and the internal pressure is
Analysis of Cross-section Stress of Concrete-filled Steel Tube Dumbbell Arch Ribs During Concrete Infusion
Analysis of Section Stress of Concrete-filled Steel Tube Dumbbell Arch Ribs During Concrete Infusion Concrete Date:2015-10-30 10:02