A new shear design method for prestressed concrete beams was developed based on the compression zone failure mechanism. The design method uses a sectional design approach, as used in current design codes. In the method, the concrete shear contribution at each design section is assumed to be mainly provided by intact concrete of the compression zone and is determined based on the material failure criteria of concrete considering the compressive normal stress developed by both the prestressing force and flexural action. Design examples using the proposed method were undertaken and the results were compared with the predictions of current design codes. The proposed method was also applied to existing experimental data. The proposed method showed better strength predictions than various current design codes and predicted the strength variation according to main design parameters with reasonable accuracy.

中文翻译：

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基于受压区破坏机理的预应力混凝土梁抗剪设计

基于受压区破坏机理，提出了一种新的预应力混凝土梁剪切设计方法。该设计方法使用当前设计规范中使用的截面设计方法。在该方法中，假设每个设计截面的混凝土剪切贡献主要由受压区的完整混凝土提供，并根据混凝土的材料破坏准则确定，同时考虑预应力和弯曲作用产生的压缩法向应力。 . 进行了使用所提出方法的设计实例，并将结果与​​当前设计规范的预测进行了比较。所提出的方法也适用于现有的实验数据。