Please wait a minute...
浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
    
Symptom-based reliability analysis for tensile structure considering stress relaxation
XIAO Nan,WAN Jie
College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China
Download:   PDF(722KB) HTML
Export: BibTeX | EndNote (RIS)      

Abstract  

In order to determine the behavior deterioration of tensile structures due to stress relaxation, the symptom-based reliability analysis method with stress variations in the members as main symptom was established. Structural cable’s relaxation process over time was simulated by the relaxation formula of steel strand previously obtained from experiments. With the continuously changing of prestress values in the members, the amounts of stress change in the controlling member over time were employed for fitting of Weibull model curve. The fitted Weibull curve was utilized for symptom-based reliability analysis and remaining lifetime prediction of cable dome structures. The results of reliability analysis were corrected according to the differences between symptom analytical values and measured values which were replaced by calculation values from relaxation formula of steel strand. The results from a case study show that remaining useful lifetime is yearly decreasing with the used years, and the structural symptom reliability is decreasing with increasing values of symptom under the consideration of structural deterioration solely due to stress relaxation. The variation of the structural symptom reliability over the symptom values is featured with the characteristics of slowly decline in nonlinearity at early time and sharply decline basically in linearity at the later time．

Published: 04 August 2014
CLC:  TU 394  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Cite this article:

XIAO Nan,WAN Jie. Symptom-based reliability analysis for tensile structure considering stress relaxation. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(7): 1195-1201.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.07.008     OR     http://www.zjujournals.com/eng/Y2014/V48/I7/1195


考虑应力松弛的张力结构症状可靠度分析

为了确定张力结构因应力松弛而引起的性能退化,用前人实验所得的钢绞线松弛模型代替结构索的松弛过程,建立以构件应力改变量为主要症状的可靠度分析方法.在构件预应力不断改变的条件下,将控制构件的应力改变量随时间的变化曲线用于拟合Weibull模型曲线,以该生命症状模型对索穹顶结构进行基于症状的可靠度分析和结构剩余寿命预测.以计算值代替实际监测值,根据计算值与理论值的差异对可靠度的分析结果进行相应的修正.通过算例表明,在单一损伤应力松弛所致结构性能退化的条件下,结构剩余寿命以年限为基准逐年递减；症状可靠度随症状值的增大而减小,表现出早期呈非线性缓慢下降、后期基本上线性急速下降的特点.

［1］ 于振兴,刘文峰,付兴藩. 工程结构倒塌案例分析［J］. 工程建设,2009, 41(2): 17．
YU Zhen-xing, LIU Wen-feng, FU Xing-fan. Analysis on engineering structure collapse case ［J］. Engineering Construction, 2009, 41(2): 17.
［2］ 张辉,周红波,高源. 大型钢筋混凝土建筑结构事故案例统计分析［J］. 建筑设计,2010, 41(7): 656-658.
ZHANG Hui, ZHOU Hong-bo, GAO Yuan. Study on accident case of large reinforced concrete structures ［J］. Architectural Design, 2010, 41(7): 656-658.
［3］ 李元齐,袁艳敏. 既有建筑钢结构可靠性评估方法探讨［J］. 建筑结构,2009, 39(4): 472-475.
LI Yuan-qi, YUAN Yan-min. Discuss on reliability assessment method of existing steel structures ［J］. Architectural Structure, 2009, 39(4): 472-475．
［4］ 赵国藩. 结构可靠度理论［M］. 北京: 中国建筑工业出版社,2000.
［5］ CERAVOLO R, PESCATORE M, STEFANO A D. Symptom-based reliability and generalized repairing cost in monitored bridges ［J］. Reliability Engineering and System Safety, 2009, 94: 1331-1339.
［6］ CEMPEL C, ZIOLKOWSKI A. A new method of symptom based processing for machinery condition recognition and forecasting ［J］. Mechanical Systems and Signal Processing, 1995, 9(2): 129-137.
［7］ CEMPEL C, NATKE H G, YAO J T P. Symptom reliability and hazard for systems condition monitoring ［J］. Mechanical Systems and Signal Processing, 2000, 14(3): 495-505.
［8］ CHEN H P, XIAO N. Symptom-based damage prognosis for deteriorating RC bridge structures ［C］∥ The 6th International Workshop on Advanced Smart Materials and Smart Structures Technology. Dalian: ANCRISSTT,2011: 112.
［9］ 董聪,丁辉,高嵩. 结构损伤识别和定位的基本原理与方法［J］. 中国铁道科学, 1999, 20(3): 89-94．
DONG Cong, DING Hui, GAO Song. The basic principles and methods of structural damage identification and positioning ［J］. China Railway Science, 1999, 20(3): 89-94．
［10］ YUAN X F, DONG S L. Nonlinear analysis and optimum design of cable domes ［J］. Engineering Structures, 2001,24(7): 965-977.
［11］ 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 Jun-hua, YUAN Xing-fei, DONG Shi-lin. Failure mode and behaveior analysis of two types of cable domes ［J］. Engineering Mechanics, 2007, 24(1): 44-50．
［12］ YOUAKIM S A, GHALI A, HIDA S E, et al. Prediction of long-term prestress losses ［J］. PCI Journal, 2007, 52(2): 116-130.
［13］ GHALI A, TREVINO J. Relaxation of steel in prestressed concrete ［J］. PCI Journal, 1985, 30(5): 82-94.
［14］ HERNANDEZ H D, GAMBLE W L. Time-dependent prestress losses in pretensioned concrete construction ［R］. ［S.l.］: University of Lllinois at Urbana-Champaign, 1975.
［15］ YOUAKIM S, KARBHARI V M. A simplified method for prediction of long term prestress loss in post-tensioned concrete bridges ［R］. San Diego: University of California,  2006．
［16］ JEONG C. Normalized life prediction in terms of stress relaxation behavior under creep-fatigue interaction ［J］. Materials Letters, 2001, 49: 20-24.
［17］ Standard A. E328-02,Stand test methods for stress relaxation tests for materials and structures ［S］. ［S.l.］: ASTM,2008．
［18］ 陆光闾. 预应力高强钢丝松弛性能研究［J］. 土木工程学报, 1997, 30(6): 41-46.
LU Guang-lv. Study on prestressed high strength steel wire relaxation properties ［J］. Civil Engineering Journal, 1997, 30(6): 4146.
［19］ ADALET Z, MUZAFFER Z. Stress relaxation properties of prestressed steel wire ［J］. Journal of Material Processing Technology, 2003, 141: 86-92.
［20］ MAGURA D D, SOZEN M S, SIESS C P. A study of stress relaxation in prestressing reinforcements ［J］. PCI Journal, 1964, 9(2): 13-57.
［21］ GLODOWSKI R J, LORENZETTI J J. A method for prediction prestress losses in a prestressed concrete structure ［J］. PCI Journal, 1972, 17(2): 17-31.
［22］ FRANCIS T K, SI X T. Accurate time-dependent analysis of bridges considering concrete creep, concrete shrinkage and cable realization ［J］. Engineering Structures, 2011, 33(1): 117-126.
［23］ PRESTON H K. Recommendations for estimating prestress losses ［J］. PCI Journal, 1975, 20(4): 43-75.
［24］ BUCKLER J D, SCRIBNER C F. Relaxation characteristics of prestressing strand ［R］. ［S.l.］: University of Lllinois at Urbana-Champaign, 19-75.
［25］ CEMPEL C. Theory of energy transforming systems and their application in diagnostics of operating systems ［J］. Applied Mathematics in Computer Science,1993,3(3): 533-548.
［26］ CEMPEL C. Passive diagnostic experiment, symptom reliability and their application in vibration condition monitoring ［J］. Zagadnienia Eksploatacji Maszyn, 1990,2(3): 343-355.
[1] YU Jia-liang, LUO Yao-zhi. Influence of torsion stiffness of spatial truss string system on structural stability[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2013, 47(8): 1353-1360.
[2] ZHU Ming-liang, DONG Shi-lin. Failure analysis of suspen-dome by vector form intrinsic
finite element method[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2012, 46(9): 1611-1618.
[3] DENG Hua, SONG Rong-min, ZHUO Xin, LOU Dao-an. Monitoring and compensation of prestress relaxation of pre-tensioned
pin-bar structure[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2011, 45(7): 1269-1275.
[4] LOU Rong, LUO Yao-zhi, ZHENG Jun-hua, LIU Hai-feng. Tension control and multi-objective optimization
of tensile cable net structure construction[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2011, 45(3): 539-543.
[5] LUO Yao-zhi, LOU Rong, LIU Hai-feng. Strain energy tracking algorithm for falsework layout
of spatial steel structures[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2010, 44(12): 2332-2336.
[6] HU Xian, LUO Yao-Chi, CHEN Yan-Ban. Nonlinear active control of tensegrity structures[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2010, 44(10): 1979-1984.
[7] WANG Zhen-Hua, DONG Dan-Lin, TIAN Wei, YUAN Hang-Fei. Experimental research on a composite structure combined of
cable dome and single-layer lattice shell[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2010, 44(8): 1608-1614.