[1]陈联盟,刘毅杰,曾一洪,等.索杆预张力结构连续倒塌非线性分析与评价[J].自然灾害学报,2022,31(05):073-80.[doi:10.13577/j.jnd.2022.0509]
 CHEN Lianmeng,LIU Yijie,ZENG Yihong,et al.Nonlinear analysis and evaluation of the progressive collapse behavior of a cable-bar tensile structure[J].,2022,31(05):073-80.[doi:10.13577/j.jnd.2022.0509]
点击复制

索杆预张力结构连续倒塌非线性分析与评价
分享到:

《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
31
期数:
2022年05期
页码:
073-80
栏目:
出版日期:
2022-10-28

文章信息/Info

Title:
Nonlinear analysis and evaluation of the progressive collapse behavior of a cable-bar tensile structure
作者:
陈联盟1 刘毅杰1 曾一洪1 章禾1 周一一2 董石麟3
1. 温州大学 建筑工程学院, 浙江 温州 325035;
2. 常州工学院 土木与建筑学院, 江苏 常州 213002;
3. 浙江大学 空间结构研究中心, 浙江 杭州 310027
Author(s):
CHEN Lianmeng1 LIU Yijie1 ZENG Yihong1 ZHANG He1 ZHOU Yiyi2 DONG Shilin3
1. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035, China;
2. College of Civil Engineering and Architecture, Changzhou Institute of Technology, Changzhou 213002, China;
3. Space Structures Research Center, Zhejiang University, Hangzhou 310027, China
关键词:
索杆预张力结构连续倒塌动力响应杆件重要性参数分析
Keywords:
cable-bar tensile structuresprogressive collapsedynamic responsemember importance analysisparameter analysis
分类号:
TU352
DOI:
10.13577/j.jnd.2022.0509
摘要:
针对索杆预张力结构缺乏有效的连续倒塌发展机理及各类杆件在连续倒塌过程中的重要性评价方法,文中结合某具体工程案例、基于ANSYS/LS-DYNA分析平台、采用全动力等效荷载瞬时卸载法动力分析方法,研究了移除不同构件引发的连续倒塌全过程动力响应及倒塌模式,提出了基于倒塌模式的杆件重要性分类方法;在此基础上,通过比较构件移除前后的节点位移引入了杆件重要性系数指标,进一步探明了各类杆件重要性系数与其杆件重要性类别及移除该杆件引发的相应倒塌模式的关系,最后分析了各设计参数对结构连续倒塌性能的影响。结果表明:(1)移除不同杆件将产生不同的动力响应和倒塌模式,其中移除内环索和外环索后动力响应最大,拉力环上弦次之,其余杆件动力响应较小;(2)各杆件具有的不同的杆件重要性系数,外环索、内环索的杆件重要性系数超过0.18,移除此类杆件将会导致结构产生连续倒塌,属于关键杆件;拉力环上弦的重要性系数在0.18~0.07之间,移除此类杆件将会导致结构产生局部连续倒塌,属于重要杆件;其余杆件的重要性系数均在0.07以下,移除后不会产生连续倒塌,属于普通杆件;(3)预应力水平、杆件截面积及环索半径、压杆长度等设计参数对结构抗倒塌能力的影响不明显,而结构榀数变化对结构各杆件重要性系数及结构倒塌模式影响较大。
Abstract:
Considering the fact that the current literature lacks both effective development mechanism for the progressive collapses and the importance evaluation method for evaluating different types of elements in the process of progressive collapses of flexible cable-strut tensile structures,a specific engineering case based on the ANSYS/LS-DYNA analysis platform was studied and the dynamic analysis method for the instantaneous unloading of full-power equivalent load was proposed in this paper. The dynamic responses of the whole-process progressive collapses and the collapse modes of the structural collapses resulted from the removals of elements were studied. Following this,the method for element importance classification based on the collapse modes was proposed,and the importance coefficient index was introduced after making comparisons of the node displacements before and after the removal of the elements.Furthermore,the correlations between the importance coefficients of various types of elements and the element importance classifications and the corresponding collapse mode caused by the removal of each element were further verified. Finally,the influences of design parameters on the structural performance of progressive collapses were analyzed. The results reveal that: (1)The removals of different elements produced different dynamic responses and collapse modes. The removals of inner hoop cable and outer hoop cable produced the largest dynamic responses,followed by the removals of top hoop cable and the remaining elements resulted in least dynamic responses.(2)Each element bore different importance coefficient. The importance coefficients of outer hoop cable and inner hoop cable exceeded 0.18. The removals of these elements would lead to the progressive collapses of the structure and they were the key elements. The importance coefficients of top hoop cable ranged from 0.18 to 0.07. The removal of these types of elements would generate partial structural collapses,and they were important elements. As the importance coefficients of the remaining elements, were all below 0.07, the removals of the aforementioned elements would not cause progressive collapses,and they could be classified as common elements. (3)Design parameters such as prestress level,cross section of the elements,radius of the hoop cable and the length of compression barshad little influences on the anti-collapse capability of the structure. The number of the cable-barunits generated significance impacts on the importance coefficient and collapse mode of each structural element.

参考文献/References:

[1] HAMID Y S,KAMILAN N F. Progressive collapse of a single layer schwedler dome[J]. International Journal of Integrated Engineering,2021, 13(3):176-183.
[2] CHIANG J. Quality engineering design and construction in Malaysia:a fast disappearing and endangered commodity[J]. Paper Series on Structural Eurocodes,2010,9(12):34-34.
[3] 熊学玉,吴学淑,汪克来,等. 体外预应力索的破坏及其修复与更换[J]. 自然灾害学报,2006,15(2):132-136. XIONG Xueyu,WU Xueshu,WANG Kelai,et al. Damage of externally prestressed tendons and its repair or replacement[J]. Journal of Natural Disasters,2006,15(2):132-136.(in Chinese)
[4] 何键,袁行飞,金波. 索穹顶结构局部断索分析[J]. 振动与冲击,2010,29(11):13-16,249. HE Jian,YUAN Xingfei,JIN Bo. Analysis of cable domes with rupture of local cable[J]. Journal of Vibration and Shock,2010,29(11):13- 16,249.(in Chinese)
[5] 王化杰,范峰,钱宏亮,等. 巨型网格弦支穹顶预应力施工模拟分析与断索研究[J]. 建筑结构学报,2010,31(S1):247-253. WANG Huajie,FAN Feng,QIAN Hongliang,et al. Analysis of pretensioning construction scheme and cable breaking for megastructure suspenddome[J]. Journal of Building Structures,2010,31(S1):247-253.(in Chinese)
[6] 区彤,陈进于,谭坚. 肇庆新区体育馆连体弦支穹顶结构防连续倒塌分析[J]. 建筑结构,2016,46(21):75-79. OU Tong,CHEN Jinyu,TAN Jian. Progressive collapse resistance analysis on conjoined suspendome structure of Zhaoqing New District Stadium[J]. Building Structure,2016,46(21):75-79.(in Chinese)
[7] TIAN L M,WEI J P,HUANG Q X,et al. Collapseresistant performance of longspan singlelayer spatial grid structures subjected to equivalent sudden joint loads[J]. Journal of Structural Engineering,2021,147(1):04020309.
[8] 贺拥军,周绪红,周佳伟. 拉索预应力空间网格结构的索张力计算及张拉全过程分析[J]. 自然灾害学报,2012,21(2):223-229. HE Yongjun,ZHOU Xuhong,ZHOU Jiawei. Pretensioning calculation and wholeprocess analysis of prestressed space reticulated structure[J]. Journal of Natural Disasters,2012,21(2):223-229.(in Chinese)
[9] 陆金钰,董霄,李娜,等. 环箍-穹顶索杆结构局部断索抗倒塌能力分析[J]. 工程力学,2016,33(S1):173-178. LU Jinyu,DONG Xiao,LI Na,et al. Progressive collapseresistant capacity analysis of torusdome cablestrut structure due to cable rupture[J]. Engineering Mechanics,2016,33(S1):173-178.(in Chinese)
[10] 江晓峰. 大跨桁梁结构体系的连续性倒塌机理与抗倒塌设计研究[D]. 上海:同济大学,2008. JIANG Xiaofeng. Study on Continuous Collapse Mechanism and Anticollapse Design of Longspan Truss Beam Structure System[D]. Shanghai:Tongji University,2008.(in Chinese)
[11] 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(7):103-109. CAI Jianguo,WANG Fenglan,FENG Jian,et al. Progressive collapse analysis of cablearch structures of the New Guangzhou Railway Station[J]. Journal of Building Structures,2010,31(7):103-109.(in Chinese)
[12] 曾滨,陆金钰,董霄,等. 增设备用索对张弦桁架抗连续倒塌性能影响研究[J]. 空间结构,2017,23(4):49-54. ZENG Bin,LU Jinyu,DONG Xiao,et al. Progressive collapse resistance of truss string structures when installing fuse cables[J]. Spatial Structures,2017,23(4):49-54.(in Chinese)
[13] UFC 4-023-03[S]Design of Buildings to Resist Progressive Collapse. Washington DC:Department of Defense, 2013.

相似文献/References:

[1]宋晓胜,苏幼坡,王兴国,等.爆炸与地震作用对钢筋混凝土结构影响的比较[J].自然灾害学报,2008,17(02):083.
 SONG Xiao-sheng,SU You-po,WANG Xing-guo,et al.Comparison of influence of blast load and seismic action on reinforced concrete structure[J].,2008,17(05):083.
[2]肖岩,赵禹斌,李凤武,等.钢筋混凝土大比例模型框架角柱突然失效模拟试验研究[J].自然灾害学报,2013,22(04):075.
 XIAO Yan,ZHAO Yubin,LI Fengwu,et al.Experimental research on a large scale RC frame model subjected to sudden corner column removal[J].,2013,22(05):075.
[3]宋子龙,王文达,王景玄,等.基于Pushdown方法的圆钢管混凝土柱-钢梁框架抗连续倒塌机制分析[J].自然灾害学报,2015,24(01):123.[doi:10.13577/j.jnd.2015.0116]
 SONG Zilong,WANG Wenda,WANG Jingxuan,et al.Progressive collapse-resistance mechanism analysis of composite frame with CFST columns and steel beams based on pushdown method[J].,2015,24(05):123.[doi:10.13577/j.jnd.2015.0116]

备注/Memo

备注/Memo:
收稿日期:2021-5-24;改回日期:2021-7-28。
基金项目:国家自然科学基金项目(51578422, 51678082)
作者简介:陈联盟(1978-),男,教授,博士,主要从事空间大跨结构和钢结构研究.E-mail:247039328@qq.com
更新日期/Last Update: 1900-01-01