International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 04 | Apr 2025
p-ISSN: 2395-0072
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SEISMIC PERFORMANCE OF ASYMMETRIC HIGH-RISE RC BUILDINGS WITH AND WITHOUT INFILL WALLS Harsh Sawant1, Radhika Jadhav2*, Uday Salunke3, Chirag Shelar4, Neha Sonavane5 1UG Student, Department of Civil Engineering, Datta Meghe College of Engineering, Airoli, Maharashtra, India
2*Assistant Professor, Department of Civil Engineering, Datta Meghe College of Engineering, Airoli, Maharashtra,
India
3UG Student, Department of Civil Engineering, Datta Meghe College of Engineering, Airoli, Maharashtra, India
4UG Student, Department of Civil Engineering, Datta Meghe College of Engineering, Airoli, Maharashtra, India 5UG Student, Department of Civil Engineering, Datta Meghe College of Engineering, Airoli, Maharashtra, India
---------------------------------------------------------------------***--------------------------------------------------------------------significantly affect the seismic response of buildings by contributing to lateral stiffness, strength, and energy dissipation capacity. Their presence can alter the dynamic characteristics of a structure, reducing lateral displacement and story drift during seismic events.
Abstract - This study presents a comprehensive seismic
analysis of a high-rise reinforced concrete building, with a particular focus on the influence of infill walls on structural performance during seismic events. A 20-story building is modelled and analysed using ETABS software, in accordance with IS 1893 (Part-1):2016 seismic design guidelines. Three structural configurations are considered: a bare frame, a frame with AAC block infill walls, and a frame with burnt clay brick infill walls. Key parameters such as story drift and lateral displacement under seismic loads are evaluated to assess the seismic behaviour of each configuration. The results demonstrate that the presence of infill walls significantly enhances the lateral stiffness and reduces displacement, thereby improving the overall seismic performance of the structure. Comparatively, the bare frame shows increased lateral displacement and reduced stiffness. Among the infill materials, burnt clay bricks provide greater stiffness than AAC blocks. The study offers valuable insights into the role of infill walls in seismic design and highlights the importance of considering these elements in high-rise construction within earthquake-prone regions.
Despite their potential benefits, infill walls are often neglected in structural analysis, which can lead to overly conservative designs that underestimate stiffness and overestimate deformations. Conversely, incorporating infill walls in seismic analysis can provide a more realistic understanding of a structure’s behaviour under earthquake loading. The type of infill material also plays a crucial role in determining the extent of these effects. Materials such as Autoclaved Aerated Concrete (AAC) blocks and burnt clay bricks differ significantly in density, strength, and stiffness, thereby influencing the overall seismic performance in distinct ways. This study aims to investigate and compare the seismic performance of a 20-story reinforced concrete building under three different conditions: a bare frame, a frame with AAC block infill walls, and a frame with burnt clay brick infill walls. The analysis is conducted using ETABS software, following the guidelines outlined in IS 1893 (Part-1):2016. Key parameters such as base shear, story drift, and lateral displacement are evaluated using the Equivalent Static Load Method. The findings will contribute to a deeper understanding of the role of infill walls in seismic design and provide practical insights for enhancing structural safety in high-rise construction.
Key Words: Infill walls, Push over Analysis, Seismic Structure, Story displacement, Story drift.
1.INTRODUCTION The seismic behaviour of high-rise buildings remains a critical focus in structural engineering, especially in regions vulnerable to earthquakes. Due to their considerable height, mass distribution, and slender geometry, high-rise buildings exhibit complex responses to seismic forces. These dynamic lateral forces, if not properly accounted for, can result in severe structural damage or even collapse. Consequently, understanding the influence of various structural and nonstructural components on seismic performance is essential for ensuring the safety and resilience of such buildings.
2. CORRESPONDING LITERATURES The seismic performance of buildings, particularly those with masonry infill walls, has been a significant focus of research in structural engineering. Numerous studies have explored the effects of infill walls on the dynamic behavior of reinforced concrete (RC) frames, highlighting their role in enhancing structural integrity during seismic events.
Infill walls, commonly constructed from materials such as brick or concrete blocks, are traditionally considered nonstructural elements used for partitioning interior spaces. However, numerous studies have shown that infill walls can
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C. Rajesh et.al (2014) [8] examined the seismic performance of reinforced concrete (RC) buildings with and without
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