|Table of Contents|

Analysis of Influencing Factors of Mechanics Performance of Hoop Base for Large Cooling Towers(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2009年03期
Page:
55-58
Research Field:
Publishing date:
2009-09-20

Info

Title:
Analysis of Influencing Factors of Mechanics Performance of Hoop Base for Large Cooling Towers
Author(s):
KE Shi-tang1;  ZHAO Lin1;  GE Yao-jun1;  GAO Ling2
1. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 2. East China Electric Power Design Institute, Shanghai 200063, China
Keywords:
large cooling tower;  subgrade;  variety of stiffness;  internal force of hoop base;  displacement of hoop base
PACS:
TU991.42
DOI:
-
Abstract:
Taking the large cooling tower as an example, the 3-D finite element analysis model considered the influence of subgrade soil was established. The influencing factors of mechanics performance of hoop base for large cooling powers, such as different subgrade soil conditions, the variety of base stiffness as well as the size and position of open hole were discussed. The analytical results show that the basic frequency of the pile foundation is less than the basic frequency of rock foundation for cooling powers, and the whole vibration modes will be excited. Meanwhile, the axis forces are mainly influenced by radial stiffness and hoop-bending stiffness, and the variety is inverse ratio with the radial stiffness,and is direct ratio with hoop bending stiffness, the amplitude is greater at the beginning, and then diminishes with the augment of bending stiffness. Finally, the radial moment value is controlled by hoop bending stiffness, and its variation tendency is opposite with the axis force, at the same time, the open hole will cause the augment of the vertical moment value, which is increased with the augment of diameter of the hole.

References:

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Memo

Memo:
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Last Update: 2009-09-20