Comparative analysis of the equations of Russian and foreign design codes for calculating the web strength capacity of I-beams with steel and FRP transverse reinforcement
Abstract
Comparative analysis of the equations of Russian and foreign design codes for calculating the web strength capacity of I-beams with steel and FRP transverse reinforcement
Incoming article date: 14.01.2023The article presents the results of comparative analysis of the equations of Russian and foreign design codes for calculating the web strength capacity of I-beams with steel and fiber reinforced polymer (FRP) transverse reinforcement. It is known that the strength of the web is affected by the properties of the transverse FRP, in particular, its relatively low modulus of elasticity. When calculating the strength of the webl, both homeland and foreign design codes do not distinguish between structures with FRP and steel transverse reinforcement. To assess the accuracy of the equations of the codes, the calculation was performed on a sample made up of the results of our tests and the experiments of other authors. When calculating according to the method of SP 295 and Eurocode 2, overestimated values of the resistance of the web with FRP were obtained. The formulas for the strength of the webs, which give a significant margin when calculating beams with steel transverse reinforcement, also overestimate the resistance of beams for specimens with composite transverse reinforcement
Keywords: wall strength, I-beams, transverse reinforcement, design standards, basalt-composite reinforcement, steel reinforcement