International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 03 | Mar 2025
p-ISSN: 2395-0072
www.irjet.net
PERFORMANCE BASED DESIGN OF SHEAR WALL STRUCTURES USING PUSHOVER ANALYSIS Swaraj V. Surve1, N. G. Gore2 1PG Student, Dept. of Civil Engineering, Mahatma Gandhi Mission's College of Engineering and Technology
(MGMCET), Kamothe, Navi Mumbai, Maharashtra, India
2Professor, Dept. of Civil Engineering, Mahatma Gandhi Mission's College of Engineering and Technology
(MGMCET), Kamothe, Navi Mumbai, Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This study analyses the seismic performance of
By integrating PBD with tools like Pushover Analysis, engineers can create buildings that effectively withstand seismic demands, reducing damage and safeguarding occupants.
RCC buildings (G+10, G+15, and G+25) in Seismic Zones IV and V under medium soil conditions. Using ETABS 2021, buildings were assessed through Equivalent Static, Response Spectrum, and Pushover Analysis. Shear walls with varying reinforcement percentages—0.25% to 1% for Zone IV and 1% to 3% for Zone V—were examined to evaluate their impact on structural stability. Key seismic parameters, including base shear, performance points, story drift, displacement, and time period, were compared. Results indicated that taller buildings required higher reinforcement ratios to meet seismic demands. Zone IV structures performed well with 0.25%–0.75% reinforcement, while Zone V required up to 3% for stability. This study provides insights into optimizing reinforcement strategies for earthquake-resistant RCC buildings.
1.1 Performance Levels in Performance-Based Design Performance-Based Design (PBD) is an advanced methodology in structural engineering that prioritizes predicting a building's performance during seismic events rather than merely adhering to traditional design codes. Unlike conventional approaches, which emphasize compliance with basic safety requirements, PBD focuses on achieving specific, measurable performance objectives tailored to the building’s intended use, location, and importance. This shift from code compliance to performancedriven design provides a refined and adaptable approach to earthquake-resistant construction, ensuring structures remain functional, resilient, and safe even under extreme seismic conditions.
Key Words: Performance-Based Design, Pushover Analysis, Seismic Resilience, Shear Wall Structures, Earthquake Engineering, Seismic Zone IV & V, Steel Reinforcement, Reinforcement Optimization.
1. INTRODUCTION
PBD organizes performance objectives into four distinct levels, each reflecting a different degree of damage tolerance and usability. These levels serve as clear design targets and offer a flexible framework to address diverse building requirements based on their roles and significance.
Performance-Based Design (PBD) is a modern approach in structural engineering that focuses on predicting how structures will behave under specific conditions, particularly during earthquakes. Unlike traditional methods that primarily aim to meet minimum safety standards, PBD establishes clear performance objectives, such as operational continuity, immediate occupancy, life safety, and prevention of collapse. This approach enables engineers to design structures that not only prioritize safety but also ensure usability after seismic events, offering a more comprehensive and tailored design solution.
Operational Level (O): This is the highest performance standard, requiring buildings to remain fully operational with no significant damage after minor earthquakes. Structures designed to this level, such as hospitals, emergency response centres, and data hubs, must ensure uninterrupted functionality of essential services. The design minimizes damage to both structural and non-structural components, allowing immediate use without the need for repairs. This level is particularly critical for infrastructure that plays a vital role in post-earthquake recovery and public safety.
A core component of PBD is Pushover Analysis, a nonlinear static procedure used to evaluate a structure's seismic performance. This method involves incrementally applying lateral loads to the structure, simulating increasing seismic forces until the structure reaches failure. Through this process, critical weak points are identified, and the overall capacity of the structure to resist seismic loads is assessed. The insights provided by Pushover Analysis allow engineers to optimize designs, ensuring greater resilience and structural reliability during earthquakes.
© 2025, IRJET
|
Impact Factor value: 8.315
Immediate Occupancy (IO): At the Immediate Occupancy level, buildings are designed to sustain minimal damage during moderate earthquakes, ensuring they can be used immediately after the event. While minor cosmetic damage may occur, the structural integrity and primary functionality remain intact. This level is essential for offices,
|
ISO 9001:2008 Certified Journal
|
Page 605