Performance Evaluation of RC Special Moment Frames Using Nonlinear Time History Analysis

DOI

10.2991/978-94-6463-672-7_3How to use a DOI?

Keywords

Non linearity; Time history analysis; SDOF; Drift ratio; Soft story

Abstract

Bangladesh, located in a seismically active region, faces significant earthquake risks, particularly in high seismic zones like Sylhet. The Bangladesh National Building Code (BNBC) provides design guidelines, including the equivalent static load method and dynamic analysis method, to ensure structural safety. While the static method is widely used for its simplicity, it often fails to capture the true structural response during seismic events. This study evaluates the seismic performance of reinforced concrete (RC) buildings in Bangladesh using nonlinear time history analysis. By incorporating nonlinear auto hinges in beams and columns, the damage levels of structures were assessed. In the absence of local earthquake data, representative time histories were generated by matching the SC soil response spectrum with global earthquakes such as El Centro, Northridge, and Kobe, scaled to simulate varying seismic intensities. Building frames designed per BNBC were assessed against performance levels for serviceability, design, and maximum earthquakes. Results show that regular frames in Sylhet meet both local and global performance criteria. However, buildings designed for gravity loads or with soft-story configurations performed poorly under maximum earthquakes, highlighting the limitations of the equivalent static method. Additionally, the study examined the impact of column tie spacing on ductility. Reduced tie spacing enhanced ductility, improving seismic performance. The findings underscore the need for advanced design methods, such as the response spectrum or time history approach, and strategies to improve ductility for irregular or soft-story buildings. These measures can enhance Bangladesh's resilience to seismic hazards. Enhanced ductility measures to ensure the safety of irregular buildings.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Abdur Rashid Ripon
AU  - Md. Faiyaz Shahriar
PY  - 2025
DA  - 2025/04/04
TI  - Performance Evaluation of RC Special Moment Frames Using Nonlinear Time History Analysis
BT  - Proceedings of the 1st International Conference on Recent Innovation in Civil Engineering and Architecture for Sustainable Development (IICASD-2024)
PB  - Atlantis Press
SP  - 17
EP  - 30
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-672-7_3
DO  - 10.2991/978-94-6463-672-7_3
ID  - Ripon2025
ER  -