Open Access

ARTICLE

Stiffness Degradation Characteristics Destructive Testing and Finite-Element Analysis of Prestressed Concrete T-Beam

by Chengquan Wang¹, Yonggang Shen², Yun Zou¹, Tianqi Li¹, Xiaoping Feng¹

1 School of Environment and Civil Engineering, Jiangnan University, Wuxi, China, 214122.
2 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China, 310058.

*Corresponding author: Yonggang Shen. Email: .

Computer Modeling in Engineering & Sciences 2018, 114(1), 75-93. https://doi.org/10.3970/cmes.2018.114.075

Abstract

The failure behavior of the precast prestressed concrete T girder was investigated by destructive test and finite-element analysis, and the mid-span deflection, girder stiffness and the variation of the cross section strain in the loading process were obtained, and the mechanical properties, mechanical behavior, elastic and plastic behavior and ultimate bearing capacity of T girder with large span were revealed. Furthermore, the relationship between the beam stiffness degradation, the neutral axis in cross-section, steel yielding and concrete cracking are investigated and analyzed. A method was proposed to predict the residual bearing capacity of a bridge based on the variation of the position of the cross section strain distribution and the section neutral axis, which provided a theoretical basis for predicting the stiffness detection and carrying capacity assessment of prestressed concrete beam.

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