Numerical Study of Irregular Structures Subjected to Incident Seismic Vibration at Various Incident Angles and Soil-Structure Interaction

DOI

10.2991/978-94-6463-884-4_12How to use a DOI?

Keywords

Seismic; Irregular Structure; Incident Angle; Soil-Structure Interaction; Structural Integrity; Dynamic analysis

Abstract

The combined impact of seismic vibration at various incident angles and soil-structure interaction can significantly amplify the seismic response of irregular structures, increasing the risk of collapse and structural damage. This study investigates the influence of seismic vibrations at various incident angles, in 10-degree increments, on the response of two types of irregular structures (L-Shaped and C-Shaped). Soil-structure interaction is incorporated in both structures to simulate real-world conditions. Two differently shaped irregular 10-story reinforced concrete residential structures that align with Bangladesh National Building Code (BNBC) 2020 design guidelines are utilized as the subject of analysis. Using site-specific soil parameters, the soil-structure interactions for both structures are modeled. For modeling, analysis, and design, the finite element method is used through Finite Element Analysis (FEA) software: SAP2000 from Computers & Structures, Inc. (CSI) which incorporates the nonlinear modal analysis method. Results from this study demonstrate that the L-shaped irregular structures exhibit maximum displacement under different incident angles of seismic vibration other than global X axes and global Y axes. This study highlights the need for a more comprehensive analytical approach that accounts for the intricacies of varying incident angles and soil-structure interaction, especially for irregular structures prevalent in Bangladesh.

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  - Mohammad Sabbir Rahman
AU  - Sheikh Arif Istiak
AU  - Md. Nazmul Haque
AU  - Md. Shahlan Kabir
PY  - 2025
DA  - 2025/11/18
TI  - Numerical Study of Irregular Structures Subjected to Incident Seismic Vibration at Various Incident Angles and Soil-Structure Interaction
BT  - Proceedings of the 8th International Conference on Engineering Research, Innovation, and Education 2025 (ICERIE 2025)
PB  - Atlantis Press
SP  - 94
EP  - 101
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-884-4_12
DO  - 10.2991/978-94-6463-884-4_12
ID  - Rahman2025
ER  -