This work mainly pertains to improvement in the mechanical properties of IS 2062 steel plates welds through gas tungsten arc welding (GTAW) process. TIG (Tungsten inert gas) welding are well known welding techniques, that are being used in industries in the current age. Mild steel was the only commonly used material in TIG welding. Mild steel is the first material consumption. The comparison is done on the basis of the mechanical properties of the welded joint of TIG welding. This study is done on mechanical testing and non-destructive tests (DPT and radiography tests) of TIG welding on IS 2062 Mild steel plates.

The development of urban population, the lack of space and the high land costs has created the scope and necessity for the high-rise structures. In high rise structures, the design of lateral load resisting systems is more crucial than gravity load resisting system. There are many structural systems exists in literature to resist lateral loads. Diagrid structure is one among them which is proven to be both structurally and architecturally efficient structural system to resist lateral loads. The present study aims to investigate the best bay spacing for a particular high-rise structure and also optimizing the best diagrid angle to suit to the selected bay spacing. A numerical study is carried out with a 24 storied high-rise structure of plan area 36m x 36m considering with and without corner columns. The structure performance is checked with a bay width of 4m and with a bay width of 6m. Each structure is analyzed for four angles of inclinations of diagrid are formed by connecting 1, 2, 3, 4 stories respectively to optimize the diagrid angle. A comparative investigation is carried out for the structural responses like storey displacement, storey drift and base shear with different diagrid angles and with different bay width.