A shear capacity model of PC beams with considering concrete softening effect

作者：Huang, Shiping; Mo, Zengmu; Luo, Yi; Wang, Weifeng^*

来源：Harbin Gongcheng Daxue Xuebao/journal of Harbin Engineering University, 2013, 34(6): 691-695.

DOI：10.3969/j.issn.1006-7043.201210048

• Concrete softening
• Design method
• Prestressed concrete beams
• Shear capacity
• Strut-and-tie model

Although the application of prestressed concrete has a history of nearly 80 years, its shear mechanism has not been fully clarified. In this paper, a group of prestressed concrete simply supported beams were designed to study its shear mechanism. By observing the crack development and shear failure mode under the stepped load of every grade of the tested beam, a new shear capacity model was proposed. The model is based on strut-and-tie model, the force transfer path is clear, and the concrete softening effect under complex stress conditions is considered. It was discovered that the model is compact, the shear capacity predicted by the model agrees well with the experiment results and can be used in the engineering design.

• 出版日期2013-6
• 单位华南理工大学; 东南大学