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Evaluation and Study on Reliability of the Structure Components of a Bridge with Consideration of Time-dependent Resistance

Author: LiuYuLing
Tutor: CaiMin
School: Hefei University of Technology
Course: Municipal Engineering
Keywords: Tied Arch Bridge Life Resistance Analysis Reliability
CLC: U441.5
Type: Master's thesis
Year: 2009
Downloads: 146
Quote: 4
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Abstract


Tied Arch Bridge is commonly used in our country on the road in the form of a bridge , is the key to ensuring the smooth flow of traffic safety , but its scientific and reasonable assessment , also has become a subject of concern at home and abroad are very reliability not only study Tied Arch has important theoretical significance, but also with a wide range of engineering applications prospects and significant economic and social benefits . In this paper , both tied arch bridge structure reliability analysis , consider the resistance changes with time . In view of this, a new kind of both structural resistance attenuation model , based on both structural reliability analysis and calculation method considering resistance to decay over time , the final application of reliability theory them carrying capacity assessment. Previously proposed by others on the FOSM center point method to calculate the reliability of improvements, JC method that improved on the FOSM center point method , or the method of checking point . Especially suitable for non-normally distributed variables exist in the actual engineering reliability . The specific method is : first find reasonable checking point , do a tangent plane origin to the tangent plane distance is the reliability index , after checking point on the limit state surface . In calculating the resistance of the material properties of the reinforced concrete is considered as a function of time , in order to be able to obtain each moment corresponding resistance . Tied Arch Bridge is a structure in the form , in consideration of the reliability of the components at the same time , also discussed the reliability of the structure , the structural system of comprehensive evaluation index is a weighted sum of its part of the assessment indicators . Reliability , and then calculate the structure of the target by the target reliability index to predict the life of the tied arch bridge , to provide information on repair and reinforcement .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics > Stress analysis, thermal stress
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