An innovation for flat traditional conventional footing Aakriti Sharma 1 , Dr Prashant Garg 2 , Amandeep Singh 2 1 M.Tech Student,Geotechnical Department, Guru Nanak Dev Engineering College Ludhiana 141006, India 2 Professor, Civil Engineering Departement, Guru Nanak Dev Engineering College Ludhiana 141006, India Abstract: Since their inception in the 1950s, shell foundations have grown in popularity over regular ones. In this paper, the ultimate load capacities of shell foundations on clay were determined by Numerical model tests. The results were compared with those for flat foundations with same base. The model test results were found using finite element analysis using program PLAXIS 2D. The experimental studies indicated that, the ultimate load capacity of shell footing on clay is higher than those on flat footing and the load settlement curves were significantly modified. The shell foundation over clay can be considered a good method to decrease the resulting settlement and material consumption at different thickness. Also rupture surface of shell upright and inverted system was significantly deeper than both normal footing. The numerical analysis helps in understanding the deformation behavior of the studied systems and identifies the failure surface of upright and inverted shell footing. Keywords: Shell Foundation, Central shell angle, Load settlement curve, Plaxis 2D 1.Introduction: Conical shell footing is a special type of foundation used for unique structures such as cooling towers, transmisson towers and heavy loaded structures. Shell foundations are explored where weak soil have to hold heavy loads. The design of shell foundation is mainly divided into two categories: soil design and structural design. Ultimate capacity and settlement characteristics of shell foundation have shown improved performance than conventional flat footing. A relentless effort to prevent depletion of natural resources via conservation, ethics of good economics, and creative aesthetic appeal are essentially three major engineering ideas favourable to selecting of shells. A shell foundation can also be used in an inverted position for structures such as guyed masts, silos and water tanks. This inverted shell has heavy meridonial tension at base and decreases upward. Also, these inverted conical structures are more efficient than conical shell structures. 2.Model Rendering: Over conventional approaches, numerical shell modelling takes use of the widespread usage of contemporary computational power. Well defined shell forms can be used to study for evaluating the shell soil interaction models numerically. Here, three proposed shell models of flat, upright and inverted footing are presented using Input in PLAXIS 2D. Journal of University of Shanghai for Science and Technology ISSN: 1007-6735 Volume 23, Issue 7, July - 2021 Page -358