[1]程东辉,刘文武.大跨度轮辐式张弦梁构件失效后力学行为研究[J].华南地震,2023,(01):14-22.[doi:10.13512/j.hndz.2023.01.02]
CHENG Donghui,LIU Wenwu.Study on Mechanical Behavior of Long-span Spoke Beam String Components After Failure[J].,2023,(01):14-22.[doi:10.13512/j.hndz.2023.01.02]
点击复制
大跨度轮辐式张弦梁构件失效后力学行为研究()
华南地震[ISSN:1006-6977/CN:61-1281/TN]
- 卷:
-
- 期数:
-
2023年01期
- 页码:
-
14-22
- 栏目:
-
土木工程防震减灾
- 出版日期:
-
2023-03-20
文章信息/Info
- Title:
-
Study on Mechanical Behavior of Long-span Spoke Beam String Components After Failure
- 文章编号:
-
1001-8662(2023)01-0014-09
- 作者:
-
程东辉; 刘文武
-
东北林业大学土木工程学院,哈尔滨 150040
- Author(s):
-
CHENG Donghui; LIU Wenwu
-
School of Civil Engineering , Northeast Forestry University , Harbin 150040, China
-
- 关键词:
-
轮辐式张弦梁结构; 构件重要性; 内力重分布; 动力效应
- Keywords:
-
Spoke beam string structures; Component importance; Redistribution of internal forces; Dynamic effect
- 分类号:
-
TU352.11
- DOI:
-
10.13512/j.hndz.2023.01.02
- 文献标志码:
-
A
- 摘要:
-
以具体案例为依托,对大跨度轮辐式张弦梁结构的构件重要性进行分析并排序,探讨不同因素对关键构件重要性的影响,基于显示动力积分法模拟关键构件瞬间失效后的结构响应,考察结构在关键构件意外失效时的力学行为。分析结果表明:内环下弦杆、拉索、支座及靠近支座处上弦梁段为关键构件;单独增大上弦截面刚度时,各关键构件重要性随之降低,单独增大垂度、初始预应力时,拉索及支座的重要性随之提高,其余关键构件重要性随之降低;拆除内环下弦杆后,结构缺乏有效的备用荷载路径,内力重分布代价较大,局部区域出现严重变形,其余关键构件失效后,环梁为主要备用荷载路径;各关键构件瞬间失效后结构动力效应明显且不相同,对于此类结构,在分析时应考虑构件失效前的初始状态。
- Abstract:
-
Based on specific cases, the importance of components of long-span spoke beam string structure is analyzed and ranked, and the influence of different factors on the importance of key components is discussed. Based on the explicit dynamic integration method, the structural response of key components after instantaneous failure is simulated,and the mechanical behavior of the structure under the unexpected failure of key components is investigated. The results show that the lower chord of the inner ring,the cable,the support and the upper chord beam near the support are the key components. When the stiffness of upper chord section is increased individually, the importance of each key component decreases. When the sag and initial prestress are increased separately,the importance of cables and supports increases, and the importance of other key components decreases. After the removal of the lower chords of the inner ring,the structure lacks an effective backup load path,the cost of internal force redistribution is high,and severe deformation occurs in local areas. After the failure of other key components, the ring beam is the main backup load path. The structural dynamic effect of each key component is obvious and different after the instantaneous failure. For such a kind of structure,the initial state before the component failure should be considered in the analysis.
参考文献/References:
[1]武啸龙.大跨度张弦桁架结构连续倒塌数值模拟及试验研究[D].南京:东南大学,2016.
[2]朱奕锋,冯健,蔡建国,等.梅江会展中心张弦桁架抗连续倒塌分析[J].建筑结构学报,2013,34(03):45-53.
[3]蔡建国,王蜂岚,冯健,等.新广州站索拱结构屋盖体系连续倒塌分析[J].建筑结构学报,2010,31(07):103-109.
[4]蔡建国,朱奕锋,冯健,等.撑杆失效对张弦结构抗连续倒塌性能的影响[J].建筑结构学报,2015,36(06):78-85+100.
[5]张微敬,胡帅领,张毅刚.双向张弦梁结构连续倒塌仿真分析与抗倒塌设计[C]//第十三届空间结构学术会议论文集.北京:中国土木工程学会桥梁及结构工程分会空间结构委员会,2010.
[6]唐恒.列车撞击作用下高铁客站无柱张弦梁雨棚结构的倒塌破坏研究[D].成都:西南交通大学,2014.
[7]殷志祥,王孟玉.考虑火灾全过程的空间双向张弦梁结构倒塌分析[J].空间结构,2021,27(03):25-31.
[8]蒋友宝,周浩,康维,等.基于抗连续倒塌性能的张弦梁结构撑杆构型与数值验证[J].建筑结构学报,2021,42(S1):186-194.
[9]王媛,王文斌.大跨度空间张弦桁架结构抗连续倒塌性能研究[J]. 结构工程师,2021,37(02):45-53.
[10]罗宇能.大跨度辐射式张弦梁结构的静力稳定性及施工仿真分析[D].广州:华南理工大学,2016.
[11]魏建鹏.大跨度单层网壳结构抗连续性倒塌分析与评估[D].西安:西安建筑科技大学,2017.
[12] GSA. Alternate path analysis & design guidelines for progressive collapse resistance[S]. Washington D. C.:General Service Administration,2013.
[13]上海市住房和城乡建设管理委员会.大跨度建筑空间结构抗连续倒塌设计标准:DGTJ08-2350-2021 [S].上海:同济大学出版社,2021.
备注/Memo
- 备注/Memo:
-
收稿日期:2022-07-15
基金项目:中央高校基本科研业务费创新团队与重大项目培育资金项目(2572016EBC1)
作者简介:程东辉(1971-),男,教授,博士生导师,主要研究方向:预应力混凝土结构及混凝土结构加固改造。E-mail: chengdonghui2000@126.com
更新日期/Last Update:
2023-03-20