NUMERICAL INVESTIGATION OF A NON-PRISMATIC GIRDER WITH SINUSOIDAL CORRUGATED STEEL WEB AND STEEL GRID

Bridges are considered to be one of the vital parts of infrastructural systems. Concrete box is one of the most commonly used structural form as girders. The corrugated webs provided in the concrete box girder prevent the structure from failure due to loss of stability. The existing studies on bridge girders with steel corrugated webs are focused on single trapezoidal arrangement. But the large forces are generated on girders result in buckling of these. In this thesis Numerical investigation of a non-prismatic simply supported overhanging girder with sinusoidal corrugated steel web and steel grid is done. Web is a flexural member in bridge girder which is required to carry heavy loads on relatively long spans. Conventional flat plate steel girders are used most commonly as webs. To overcome its limitations of poor web stability and low buckling strength, corrugated steel webs are used. To enhance the flexural strength and buckling capacity of corrugated steel web, different models of single sinusoidal, double sinusoidal, single sinusoidal with stiffeners, trusses connecting corrugated webs, Ultra-Light weight Cement Concrete (ULCC) infill are used. Another model of steel grid is also used as web. Non-linear buckling analysis of non-prismatic girder with sinusoidal corrugated steel web and steel grid are carried out using ANSYS 2021 R1 software. Parametric investigations in terms of flexural actions such as shear in steel and concrete are also conducted. The results shows that non-prismatic girder with double sinusoidal corrugated web infilled with ULCC have more strength and better load carrying capacity as compared to other type of girders. Effect on sinusoidal and trapezoidal corrugated steel webs shows that sinusoidal corrugation shows better performance than trapezoidal corrugation.