Various national codes of practice play a crucial role in the development of the country’s infrastructure and should be developed based on principles of mechanics and experimental verification. Continuous monitoring of infrastructure and updating of relevant codes of practice at regular intervals is essential to withstand the ever-increasing demand of the country’s infrastructure. In the present study, the shear design provisions of prestressed concrete (PC) in IS 1343-2012 have been reviewed. The assumptions used in the formulations of the existing shear design equations in IS 1343-2012 have been discussed. The present study reveals that the IS 1343-2012 shear design provisions, which are based on old test data, are too conservative and are unable to distinguish the two major modes of traditional shear failure, namely web-shear and flexure-shear. Modifications for the existing IS 1343-2012 shear design equations have been proposed to improve the shear strength estimation of PC members and also to distinguish between the web-shear and flexure-shear failure modes. A detailed comparison of existing IS 1343-2012 shear design provisions with the proposed modified shear strength equations has also been made with the help of a traditional shear database on PC members with stirrups.

各种国家实践准则在国家基础设施的发展中起着至关重要的作用，应根据力学原理和实验验证来制定。持续监控基础设施并定期更新相关的操作规范对于承受该国基础设施不断增长的需求至关重要。在本研究中，对IS 1343-2012中预应力混凝土（PC）的抗剪设计规定进行了审查。讨论了在IS 1343-2012中现有剪力设计方程式的公式中使用的假设。本研究表明，基于旧测试数据的IS 1343-2012剪切设计规定过于保守，无法区分传统剪切破坏的两种主要模式，即腹板剪切和弯曲剪切。已提出对现有IS 1343-2012剪切设计方程的修改，以改善PC构件的剪切强度估计，并区分腹板剪切和弯曲剪切破坏模式。借助于传统的带有箍筋的PC构件的剪切数据库，还对现有的IS 1343-2012剪切设计规定与建议的修改后的剪切强度方程进行了详细比较。