DocumentCode :
2700433
Title :
Study on direct updating theory for derrick steel structures with damage and defacements
Author :
Han, Dongying ; Wang, Zhilei ; Shi, Peiming ; Li, Geng ; Xia, Kewei
Author_Institution :
Sch. of Automotive & Energy Eng., Yanshan Univ., Qinhuangdao, China
fYear :
2012
fDate :
15-18 June 2012
Firstpage :
824
Lastpage :
828
Abstract :
Several damage and defacements widely existing in derrick steel structures are divided into local and overall damage and defacements. Local damage and defacements include cross-section corrosion, member bar initial flexure and the nodes stiffness reducing. The overall damage defacements include overall initial flexure, loading eccentricity and support subsidence. The corresponding damage correction functions are respectively derived. Revising the finite element model directly by these functions, the numerical model tending to real structure can be obtained. Measurement for damage and defacements and dynamic load stress test are conducted on in-service derrick steel structure. The corrosion thickness of member bars, the initial flexural deformation of the rods, the overall initial flexure, the loading eccentricity and support subsidence are measured. Direct updating theory is used to revise the finite element model, and safety assessment for the in-service derrick steel structure is carried on. The results show that the derrick steel structure with damage and defacements can not meet the original design requirements and the actual bearing capacity decreases. The results provide a valuable reference for the safety operation of the in-service derrick steel structure.
Keywords :
bars; bending; corrosion; elasticity; finite element analysis; mechanical testing; rods (structures); safety; steel; stress analysis; structural engineering; bearing capacity; cross-section corrosion; damage correction functions; direct updating theory; dynamic load stress test; finite element model; in-service derrick steel structure; loading eccentricity; local damage; local defacements; member bar corrosion thickness; member bar initial flexure; node stiffness reduction; numerical model; overall damage; overall defacements; overall initial flexure; rod initial flexural deformation; structural damage; structural defacements; structural safety assessment; structural safety operation; support subsidence; Bars; Corrosion; Finite element methods; Indexes; Load modeling; Steel; Stress; damage and defacements; derrick steel structures; direct updating theory; finite element model; safety bearing capacity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Quality, Reliability, Risk, Maintenance, and Safety Engineering (ICQR2MSE), 2012 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-0786-4
Type :
conf
DOI :
10.1109/ICQR2MSE.2012.6246355
Filename :
6246355
Link To Document :
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