International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 11 | Nov 2025
p-ISSN: 2395-0072
www.irjet.net
ANALYSIS AND DESIGN OF G+20 MULTI-STOREY BUILDING WITH SKY WALK BY USING STAADPRO Prafull B. Dhule 1, Satish S. Manal2 1 P.G. Student, Civil Engineering Department, CSMSS College, Chhatrapati Sambhajinagar (Aurangabad) 2 Assistant Prof, Civil Engineering Department, CSMSS College, Chhatrapati Sambhajinagar (Aurangabad)
---------------------------------------------------------------------***--------------------------------------------------------------------1.1 High-Rise Building: Abstract - The rapid global trend of urbanization has necessitated the construction of multi-story and high-rise buildings to optimize limited urban land space. Structural design in such tall buildings is critically focused on ensuring safety, serviceability, and economic viability, particularly when subjected to severe lateral forces like wind and seismic ground motion. This project report presents the structural analysis and design of a G+20 (Ground + 20 stories) twin-tower high-rise building complex featuring an integrated skywalk system, performed using the finite element analysis software, STAAD.Pro V8i. The structural model consists of twin towers of a circular cross-sectional geometry (30 meters in diameter, 45 meters center-to-center spacing) with a height of 63 meters. The towers are connected by four separate skywalks, strategically located at the 4th, 9th, 14th, and 19th floor levels, which function as critical safety escapes and pedestrian connectors. The design utilized M40 grade concrete and Fe500 grade steel. The key findings confirmed the robust structural integrity and excellent serviceability of the design. The Story Drift Analysis Report indicated that all calculated story drift ratios successfully "PASS" the prescribed code limits. The maximum observed story drift was 0.5747 cm (at the 8th story), which is well within the allowable drift limit (L/40). The seismic analysis showed a fundamental time period of 1.61687 seconds. In conclusion, the structural analysis and design process, leveraged by the advanced capabilities of STAAD.Pro, resulted in a safe, cost-efficient, and compliant design for a complex high-rise structure with connecting skywalks.
A high-rise building is a tall, multi-story structure generally defined as being significantly taller than surrounding buildings and requiring mechanical vertical transportation, like elevators, to access its upper levels. They are primarily built to maximize usable space on expensive or limited urban land, serving as residences, offices, or mixeduse facilities. This strategy is known as vertical urban expansion. It is a structure consisting of many structures connected by connecting structures such as sky gardens and sky bridges. Therefore, there are many types of connections: fixed, semi-fixed, articulated, etc. There are two big symbols that show this trend: Petronas Towers in Malaysia and Marina Bay Sands in Singapore. These home connections are often too developed to be effective. More importantly, seismic response is an important consideration in structural design, as the response of the main structure depends on many parameters such as seismic properties, soil type and materials. FEM is a mathematical technique that can be used to analyze many engineering problems under static, dynamic, linear or nonlinear conditions.
1.2 Building Shapes (Cross-Sectional Types):
The shape of a high-rise building's cross-section is a critical design choice, dictated by a combination of structural integrity (especially lateral load resistance), aerodynamics, functionality, and aesthetics.
Key Words: G+20, High Rise, Skywalk, STAAD Pro, Drift Analysis.
(i) Rectangular/Square): Rectangular and square high-rise buildings are common due to their structural simplicity, which makes them easier and more efficient to design and construct. Their straightforward geometry allows for simplified calculations for self-weight, wind loads, and seismic loads, and provides regular, easy-todivide floor plans.
1.INTRODUCTION Now a days tall or multi-story buildings has gain importance very much, because in tier-1 cities there is a rapid increase in population with limited space for building. All people require good accommodation, aesthetics, comfort and safety. That is the reason for increase in construction of multi-story buildings. Structural design of multi-story buildings is basically worried with safety during ground motion, serviceability what’s more, and potential for monetary misfortune. Design of structures using Limit State method Design The members are designed for the limiting bending moment and serviceability limits, hence the structures are left with minimum reserve energy. Earthquakes will cause more severe effect on tall buildings compared to small buildings.
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(ii) Circular/Cylindrical: Circular and cylindrical high-rise buildings are impressive architectural structures, with famous examples including the Guangzhou Circle in China, which is the world's tallest circular building, the Aldar HQ in Abu Dhabi, and the Westin Bonaventure Hotel in Los Angeles. These designs offer unique benefits such as reduced wind resistance and aesthetic appeal and are sometimes inspired by cultural symbolism.
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