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|本期目录/Table of Contents|

大跨度预应力双层组合扭网壳连续倒塌机理及其控制研究

《应用力学学报》[ISSN:1000-4939/CN:61-1112/O3]

期数:
2019年02期
页码:
316-325
栏目:
出版日期:
2018-12-18

文章信息/Info

Title:
The progressive collapse mechanism and collapse control for long-span prestressed double-layer combined twisted lattice shell
作者:
陈映1张晓辉1申波1马克俭1龙海芳2王惠1
1 贵州大学 空间结构研究中心 550003 贵阳;2 贵州民族大学 人文科技学院 550025 贵阳
Author(s):
Chen Ying1 Zhang Xiaohui1 Shen Bo1 Ma Kejian1 Long Haifang2 Wang Hui1
1 Space Structure Research Center of Guizhou University, 550003, Guiyang, China; 2 Humanities and Technology Institute of Guizhou National University, 550025, Guiyang, China
关键词:
组合扭网壳预应力钢索套管构件连续倒塌敏感性区域
分类号:
TH212;TH213.3
DOI:
10.11776/cjam.36.02.B134
文献标识码:
A
摘要:
大跨度预应力双层组合扭网壳结构造型优美,主要应用于体育馆等公共建筑,其连续倒塌始于主要压杆的失稳。本文研究了该结构的连续倒塌机理,分析了套管构件(一种失稳被动控制构件)对结构倒塌的控制作用。采用考虑初始条件的等效荷载卸载法,对结构进行了动力时程分析。结果表明:拆除1根预应力钢索,结构会发生连续倒塌破坏,预应力钢索是结构的关键构件;拆除支座附近2个、3个节点和其它位置的节点,结构不会发生连续倒塌;拆除支座附近4个节点时,结构会发生连续倒塌破坏。在最先出现塑性铰的位置及位移最大的位置布置套管构件,其对结构倒塌的控制作用较差;在受力最大位置布置套管构件,其对结构倒塌的控制作用较好;当布置2根套管构件时,可以有效控制结构的连续倒塌破坏。

参考文献/References

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