索杆张力结构的构件长度误差效应

doi:10.3785/j.issn.1008-973X.2011.01.011

2011, Vol. 45

Issue (1): 68-74 DOI: 10.3785/j.issn.1008-973X.2011.01.011

土木工程

索杆张力结构的构件长度误差效应

邓华1,程军1,蒋本卫1,楼道安2

1.浙江大学空间结构研究中心,浙江杭州 310058；2.浙江展诚建设集团股份有限公司,浙江杭州 310005

Member length error effect on cable-strut tensile structure

DENG Hua1, CHENG Jun1, JIANG Ben-wei1, LOU Dao-an2

1. Space Structures Research Center, Zhejiang University, Hangzhou 310058, China；
2. Zhejiang Zhancheng Construction Group Limited, Hangzhou 310005, China

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摘要：

针对构件长度误差会造成索杆张力结构的实际预张力偏离设计值这一问题,建立构件长度误差效应分析问题的数学模型,采用悬链线索单元及精确协调方程以确保计算精度.利用动力松弛法来进行求解,避免了刚度矩阵的建立.建立反映预张力偏差和长度误差关系的敏感性矩阵.考虑到结构的实际施工成形是以张拉索索力来控制的,基于牛顿法提出存在索力约束条件的长度误差效应求解方法.以一个实际工程中的索桅杆张力系统作为算例,通过4种不同张拉方案下的长度误差效应敏感性分析,表明了索杆张力结构的张拉方案评价必须考虑长度误差效应的控制效率.

Abstract:

Member length error can substantially cause the prestress deviation of cable-strut tensile structure from design value. The mathematical model was conducted to analyze the effect of member length error, in which the catenary cable element and its precise compatibility equation were adopted to ensure the computational accuracy. The dynamic relaxation method was employed to solve the problem devoid of the establishment of stiffness matrix. A sensitivity matrix was established to analyze the relationship between the tension deviation and the length error. A numerical method based on Newton method was further developed to calculate the error effect with additional condition of given tension force of certain cable considering that the structural form in construction was controlled by the tension force of directly pretensioned cable. The structural sensitivity to member length error under four different pretensioning schemes were compared by an illustrative example of a practical mast-cable system. Results indicated that the control efficiency of member length error effect was indispensable for evaluating the pretensioning scheme of cable-strut tensile structure．

出版日期: 2011-03-03

TU 393.3

基金资助:

国家自然科学基金资助项目(50978226)；国家“十一五”科技支撑计划资助项目(2006BAJ03A0303)；浙江大学浙江展诚建设集团现代施工技术中心资助项目.

作者简介: 邓华（1971-），男，江西安福人，教授，博导，从事空间结构和钢结构研究.E-mail：denghua@zju.edu.cn

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引用本文:

邓华,程军,蒋本卫,楼道安. 索杆张力结构的构件长度误差效应[J]. J4, 2011, 45(1): 68-74.

DENG Hua, CHENG Jun, JIANG Ben-wei, LOU Dao-an. Member length error effect on cable-strut tensile structure. J4, 2011, 45(1): 68-74.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.01.011 或 http://www.zjujournals.com/eng/CN/Y2011/V45/I1/68

［1］钱若军. 张力结构的分析、设计、施工［M］. 南京:东南大学出版社, 2003: 3-24．
［2］邓华,李本悦,姜群峰. 关于索杆张力结构形态问题的认识和讨论［J］. 空间结构, 2003,9(4): 39-46．
DENG Hua, LI Benyue, JIANG Qunfeng. Comprehension and discussion on the form of cablestrut tensile structures ［J］. Spatial Structures, 2003, 9(4): 39-46．
［3］唐建民,沈祖炎. 圆形平面轴对称索穹顶结构施工过程跟踪计算［J］. 土木工程学报, 1998, 31(5): 24-32．
TANG Jianmin, SHEN Zuyan. The research of computation method of construction process simulation for axial symmetrical cable domes with circular plane ［J］. China Journal of Civil Engineering, 1998, 31(5): 24-32．
［4］张其林,罗晓群,杨晖柱. 索杆体系的机构运动及其与弹性变形的混合问题［J］. 计算力学学报, 2004, 21(4): 470-474．
ZHANG Qilin, LUO Xiaoqun, YANG Huizhu. Mechanism motion and motiondeformation hybrid problems of cablemember systems ［J］. Chinese Journal of Computational Mechanics, 2004, 21(4): 470-474．
［5］沈世钊, 徐崇宝, 赵臣.悬索结构设计［M］.北京：中国建筑工业出版社,1997: 77-84．
［6］伍晓顺, 罗挺, 邓华. 悬链线索元的协调方程式及其弦向刚度［J］. 空间结构, 2006, 12(4): 32-35．
WU Xiaoshun, LUO Ting, DENG Hua. Compatible equation and chorddirection stiffness expression of catenary cable element ［J］. Spatial Structures, 2006, 12(4): 32-35．
［7］ OTTER J R H, CASSELL A C, HOBBS R E. Dynamic relaxation ［J］. Proceedings of Institution of Civil Engineers, 1966, 35: 633-656．
［8］ CUNDALL P A. Explicit finite difference methods in geomechanics ［C］∥Proceedings of Engineering Federation Conference on Numerical Methods in Geomechanics. Blacksburg, Virginia: ［s.n.］, 1976．
［9］ BARNES M R. Formfinding and analysis of prestressed nets and membranes ［J］. Computers and Structures, 1998, 30(3): 685-695.

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