International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 07 | Jul 2025
p-ISSN: 2395-0072
www.irjet.net
DESIGN AND ANALYSIS OF HIGH-RISE TOWER WITH GEOMETRICALLY COMPLEX MODIFIED OCTAGONAL LAYOUT WITH TESSELLATING PATTERN P. S S SUNDAR KUMAR1, Asst Prof. V. SRAVANI2 1PG student, Amrita Sai Institute of Science and Technology, Paritala, Vijayawada, Andhra Pradesh, INDIA. 2Asst Professor, Dept. of Civil Engineering, Amrita Sai Institute of Science and Technology, Paritala, Vijayawada,
Andhra Pradesh, INDIA. ---------------------------------------------------------------------***--------------------------------------------------------------------employed for the foundation design, integrating finite Abstract - This project focused on the design of high-rise element analysis with code-based checks.
residential building in modified octagonal tessellating pattern in the Vijayawada region. The main objective of this project is to determine the feasibility and performance of the unique structural geometry in various soil-related challenges. Generally, in this region, high-rise buildings are restricted owing to poor soil conditions and ground water table levels. In addition, the octagonal shape in tessellating pattern of the flats in the building will be considered. The ETABS and SAFE software were considered for designing and analyzing the structure. Main frame structures such as columns, beams, and slabs were designed using ETABS and Substructure was designed using SAFE software. The design adheres to the IS codes and considers the effects of torsion, lateral drift, and base reactions on the overall stability of the structure. This project evaluates the load distribution and wind resistance of an irregular geometrical building as well as high-rise building interactions with poor soil conditions. The results aim to demonstrate that with proper analysis and foundation design, modified octagonal tessellating pattern high-rise buildings can be a structurally efficient solution in height-constrained and geotechnically challenging regions like Vijayawada.
1.1 OBJECTIVE OF THE STUDY Design and analyse a high-rise octagonal building using ETABS per IS 875 and IS 1893. Evaluate building response to wind and seismic forces. Design a suitable raft foundation in SAFE for black cotton soil. Recommend practical solutions for heightrestricted zones. 1.2 SCOPE OF THE WORK Structural modelling and load application in ETABS. Wind and seismic analysis per Indian standards. Raft foundation design using SAFE. Non-structural elements (e.g., plumbing) are excluded.
2. LITERATURE REVIEW
Key Words:
Story drift control, Dynamic response spectrum analysis, Soil structure interaction, Safe bearing capacity (SBC), Shear wall optimization, Finite Element method, Structural serviceability assessment
1.INTRODUCTION
Rapid urban growth and limited land availability have led to vertical expansion in cities. In Vijayawada, Andhra Pradesh, high-rise structures face restrictions due to black cotton soil, which poses challenges like settlement and swelling. This study focuses on designing a G+15 residential building in such geotechnical conditions, using a modified octagonal tessellating pattern to enhance structural performance and aesthetics under lateral loads. ETABS software is used for 3D modelling, analysis, and design of the superstructure, while SAFE software is
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Abhay Guleria (2014) analyzed various multistoried buildings with different plan configurations using ETABS. His study emphasizes how structural behavior and lateral force distribution vary with geometry. This is particularly relevant to the current project where an octagonal plan is adopted, requiring efficient load path analysis. Kumar et al. (2012) investigated the response of structurally irregular building frames under seismic excitations. Their findings highlight the importance of symmetry and mass distribution, reinforcing the decision to incorporate a central shear wall core in the present design for lateral stability. The study by Sheikh Arif Ahmed Pial (2025) addresses the analysis and design of structures on mixed soil conditions, such as partially soft and hard soils. This is analogous to the current study
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