Method and system for predicting corrosion fatigue life of prestressed concrete bridges

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United States of America Patent

PATENT NO 11486815
APP PUB NO 20210199560A1
SERIAL NO

16758868

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Abstract

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The invention discloses a method and a system for predicting the corrosion fatigue life of prestressed concrete bridges. A corrosion level of the strand is predicted to obtain the residual tension force of a structure. A stress concentration factor is integrated to consider the stress concentration effect caused by pitting corrosion, and a growth model of the elastic stress of the strand under the coupled effect of corrosion and fatigue is proposed. A growth model of the plastic stress of the strand is established using a cross-section loss of the strand as a fatigue damage parameter based on a degenerated elastic modulus of the concrete after fatigue. Failure criteria for the concrete, the strand, and a longitudinal tension bar are defined, so that a set of methods for analyzing the life of a prestressed concrete bridge subjected to corrosive environment and fatigue load are formed.

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Patent Owner(s)

Patent OwnerAddress
CHANGSHA UNIVERSITY OF SCIENCE & TECHNOLOGY410076 CHEK LAP ROAD TIANXIN DISTRICT HUNAN CHANGSHA 45 CHANGSHA CITY HUNAN PROVINCE 410076

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Guo, Zhongzhao Hunan, CN 2 1
Ma, Yafei Hunan, CN 4 1
Su, Xiaochao Hunan, CN 1 1
Wang, Lei Hunan, CN 2386 21419
Zhang, Jianren Hunan, CN 4 1

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