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Novel empirical model for predicting residual flexural capacity of corroded steel reinforced concrete beam

Frontiers of Structural and Civil Engineering 2020年第4期14卷 888-906页

作者： Zhao-Hui LU Hong-Jun WANG Fulin QU Yan-Gang ZHAO Peiran LI Wengui LI Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Bejing University of TechnologyBeijing 100124China School of Civil Engineering Central South UniversityChangsha 410075China School of Civil and Environmental Engineering University of Technology SydneyNSW 2007Australia

In this study,a total of 177 flexural experimental tests of corroded reinforced concrete(crc)beams were collected from the published *** database of flexural capacity of crc beam was established by using unified and standardized experimental *** this database,the effects of various parameters on the flexural capacity of crc beams were discussed,including beam width,the effective height of beam section,ratio of strength between longitudinal reinforcement and concrete,concrete compressive strength,and longitudinal reinforcement corrosion *** results indicate that the corrosion of longitudinal reinforcement has the greatest effect on the residual flexural capacity of crc beams,while other parameters have much less *** addition,six available empirical models for calculating the residual flexural strength of crc beams were also collected and compared with each other based on the established *** indicates that though five of six existing empirical models underestimate the flexural capacity of crc beams,there is one model overestimating the flexural ***,a newly developed empirical model is proposed to provide accurate and effective predictions in a large range of corrosion ratio for safety assessment of flexural failure of crc beams confirmed by the comparisons.

关键词： crc beams flexural capacity steel corrosion database empirical models

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