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

• 作者: Chengquan Wang Tianqi Li Xiaoping Feng Yonggang Shen Yun Zou
• 来源期刊: 工程与科学中的计算机建模(英文)
• 学科: 工学
• 关键词: PRESTRESSED concrete T-BEAM destructive testing FINITE-ELEMENT STIFFNESS plane-section ASSUMPTION
• 年，卷（期）: 2018,（1）
• 页码范围: 75-93
• 页数: 19页
• 分类号: TU3

摘要

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.