为了研究Geiger型碳纤维索穹顶结构的连续倒塌路径及破坏模式，基于备用传力路径(alternate path,AP)方法，采用等效荷载瞬时卸载法来模拟初始失效构件的拆除，对矢跨比为0.1的索穹顶结构的连续倒塌全过程进行了非线性动力数值分析。提出结构重要性矩阵和构件重要性系数的概念，建立了倒塌控制方程。依据倒塌控制方程将构件分为：关键构件、重要构件和一般构件。上述三类构件分别对应于在拆除该构件后结构发生整体连续倒塌、局部连续倒塌和不发生连续倒塌三种倒塌结果。通过参数分析，得出结论：对倒塌结果影响较大构件为内环索、内圈和中圈压杆。针对Geiger型碳纤维索穹顶结构提高抗连续倒塌性能提出设计建议。
Abstract
Here, in order to study progressive collapse path and failure mode of Geiger type carbon fiber cable dome structure, based on the alternate path method, the equivalent load instantaneous unloading method was used to simulate removal of initial failure components. The nonlinear dynamic numerical analysis was performed for the progressive collapse of a cable dome structure with a rise-span ratio of 0.1. The concepts of structural importance matrix and component importance coefficient were proposed, and then the collapse control equation was established. According to the collapse control equation, components were divided into key component, important one and general one. These three types of members were corresponding to 3 collapse results of whole structure progressive collapse, local progressive collapse and non-progressive collapse after removal of the component studied. Through analyzing parameters, the results showed that the components greatly affecting collapse results are inner ring cable, inner circle compression bar and middle circle one. Finally, design suggestions for Geiger type carbon fiber cable dome structure to improve its anti-progressive collapse performance were proposed.
关键词
Geiger型碳纤维索穹顶结构 /
抗连续倒塌 /
备用传力路径法 /
重要性系数
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Key words
Geiger type carbon fiber cable dome structure /
progressive collapse resistance /
alternate path method /
importance coefficient
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参考文献
［1］郑君华, 袁行飞, 董石麟. 两种体系索穹顶结构的破坏形式及其受力性能研究［J］. 工程力学, 2007, 24(1):44-50.
ZHENG Junhua, YUAN Xingfei, DONG Shilin. Failure mode and behaveior analysis of two types of cable domes［J］. Engineering Mechanics, 2007, 24(1):44-50.
［2］陈联盟, 董石麟, 袁行飞. Kiewitt型索穹顶结构拉索退出工作机理分析［J］. 空间结构, 2010, 16(4):29-33.
CHEN Lianmeng, DONG Shilin, YUAN Xingfei. Cable exit-working mechanism analysis of Kiewitt cable domes［J］. Spatial Structures, 2010, 16(4):29-33.
［3］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+249-250.
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+249-250.
［4］钟凌, 郭正兴. 葵花型索穹顶结构力学性能及拉索破断试验研究［J］. 工程力学, 2013, 30(1):271-276.
ZHONG Ling, GUO Zhengxing. Experimental research on mechanical properties and cable broken of levy cable dome［J］. Engineering Mechanics, 2013, 30(1):271-276.
［5］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(增刊1):173-178.
LU Jinyu , DONG Xiao, LI Na, et al. Progressive collapse-resistant capacity analysis of torus-dome cable-strut structure due to cable rupture［J］. Engineering Mechanics, 2016, 33(Sup1):173-178.
［6］Structural use of concrete, Partl: Code of practice for design and construction: BS 8110［S］. London: British Standard Institute, 2002.
［7］Eurocode 1: Actions on structure-Part 1-7: General Actions-Accidental actions: EN 1991-l-7［S］. Brussels: European Committee for Standardization, 2006.
［8］General Services Administration. Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects［S］. Washington DC: GSA, 2013.
［9］Department of Defense. Design of buildings to resist progressive collapse UFC 4-023-03［S］. Washington DC: Department of Defense, 2013.
［10］MURTHA-SMITH E. Alternate path analysis of space trusses for progressive collapse［J］. Journal of Structural Engineering, 1988, 114(9):978-1999.
［11］王蜂岚. 索拱结构屋盖体系的连续性倒塌分析［D］. 南京: 东南大学, 2009.
［12］BUSCEMI N, MARJANISHVILI S. SDOF model for progressive collapse analysis［C］. Structures Congress, 2005.
［13］General Services Administration. Progressive collapse analysis and design guidelines for new federal office buiidings and major modernization projects［S］. Washington DC: GSA, 2003.
［14］胡晓斌, 钱稼茹. 结构连续倒塌分析与设计方法综述［J］. 建筑结构, 2006, 36(增刊1):573-577.
HU Xiaobin, QIAN Jiaru. Overview of analysis and design approaches for progressive collapse of structures［J］. Building Structure, 2006, 36(Sup1):573-577.
［15］蔡建国, 冯健, 朱奕锋. 预应力张弦结构抗连续倒塌性能研究［M］. 北京: 科学出版社, 2016.
［16］公路斜拉桥设计细则:JTGT D65-01—2007［S］. 北京: 人民交通出版社, 2007.
［17］袁行飞. 索穹顶结构截面和预应力优化设计［J］. 空间结构, 2002(3):51-56.
YUAN Xingfei. Optimal design of cable domes［J］. Spatial Structures, 2002(3):51-56.
［18］建筑结构荷载规范: GB 50009—2012［S］. 北京: 中国建筑工业出版社, 2012.
［19］膜结构技术规程: CECS 158—2015［S］. 北京: 中国建筑工业出版社, 2015.
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