• Gaurav S. Kewatkar
• Prof. P. S. Lande

During earthquake, civil structures are subjected to damaging forces. Tall buildings if damaged would threaten the life safety of inhabitants or at least would cease to offer the same level of function. For this reason, tall buildings should be designed in accordance with the seismic provisions that ensure suitable performance during and aftermath. Also, recently diagrid structural system is adopted in tall buildings due to its structural efficiency and flexibility in architectural planning. The diagonal members in diagrid structural systems can carry gravity loads as well as lateral forces due to their triangulated configuration and diagrid system Building save approximately 20 percent of the structural steel weight when compared to a conventional moment-frame structure. One of the factors that dominate Diagrid buildings design is the dynamic soil-structure interaction (SSI) that differs significantly with the variation of several aspects. In this research have considered with SSI effect and without SSI effect on diagrid building using the Winker’s method, studied the effect on Soft soil, Medium Soil, Hard Soil of the Diagrid building under consideration. Seismic load may cause collapse during the life of building. Therefore, it must have been studied then building’s seismic performance with soil effect. That’s why we see the term SSI refers to the actual performance with considering the effect of soil. The building was taken to be G+10, symmetrical space frame of 4 bay in both x and y direction, 11 storey, 3.2m storey height (4 X 4 X 11), which is resting on raft foundation with fixed base and flexible base. Three types of soil i.e. Hard, Medium Hard and Soft Soil are used for the SSI study. Dynamic analysis is carried out using the Time-History of El-Centro. The soil flexibility is incorporated in the analysis using Winkler approach (spring model). SAP-2000 is used for developing these models. The effect of SSI on various structural parameters i.e. natural time period, base shear, Story displacement, Story Drift are studied and discussed. The comparison is made between the approaches of SSI modeling i.e. Winkler approach (spring model) and Fixed base. The study reveals that the SSI significantly affects the response of the structure. The seismic load input was El-Centro acceleration time-history record. Results of analysis showed the displacements and base shear values time period. Then compared the result of diagrid building without SSI and with SSI effect in various type of Soil.

Diagrid system, High-rise buildings, Seismic Response, Raft Footing, Finite Element Method, Winkler Method, SAP2000, structure soil structure interaction (SSI), Time History.

"Seismic Response of Diagrid system Building with Soil-Structure Interaction", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 7, page no.i261-i274, July-2023, Available :http://www.jetir.org/papers/JETIR2307833.pdf

"Seismic Response of Diagrid system Building with Soil-Structure Interaction", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 7, page no. ppi261-i274, July-2023, Available at : http://www.jetir.org/papers/JETIR2307833.pdf