Numerical Simulation of Unreinforced Masonry Walls Subjected to Tree Impact Load Using a Simplified Micro-Modelling Approach

DOI

10.2991/978-94-6463-952-0_6How to use a DOI?

Keywords

Numerical Analysis; Unconfined Masonry Wall; Impact Load Ansys LS-DYNA; Tree Impact

Abstract

The Aceh region, located in the subduction zone between the Indo-Australian and Eurasian Plates, is highly vulnerable to natural disasters, particularly earthquakes and impact loads that can damage building structures. One commonly used building structure system is the unconfined masonry wall, which is not reinforced at all with columns or beams. Without these reinforcing elements, unconfined masonry walls are more susceptible to impact loads and other dynamic forces. Buildings with unconfined masonry systems are generally more vulnerable to dynamic loads, including impacts caused by falling trees. This study aims to analyze the collapse pattern of unconfined masonry walls (UMW) subjected to impact loads using the Simplified Micro Modeling (SMM) approach in the ANSYS LS-DYNA R14 application. The model used is a brick wall with dimensions of 400 x 300 x 13 cm, subjected to an impact load from a fallen tree traveling at an initial velocity of 5 m/s, at distances of 3, 5, and 6 meters from the wall. The results indicate that the greater the impact distance, the larger the deformation in the wall. Model M3 (at 6 meters) showed the most severe damage, including shear failure at the center of the wall. Additionally, the crack patterns reflect the interaction of bending and shear forces, which become more complex as the impact distance increases. The damage ratio in Model M3 reaches approximately 44.62% of the total wall volume, indicating that unconfined masonry walls are highly vulnerable to impact loads caused by falling trees.

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  - Hanil Al Kanafi
AU  - Yunita Idris
AU  - Muttaqin Hasan
PY  - 2025
DA  - 2025/12/26
TI  - Numerical Simulation of Unreinforced Masonry Walls Subjected to Tree Impact Load Using a Simplified Micro-Modelling Approach
BT  - Proceedings of the 6th Aceh International Symposium on Civil Engineering (AISCE 2025)
PB  - Atlantis Press
SP  - 57
EP  - 73
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-952-0_6
DO  - 10.2991/978-94-6463-952-0_6
ID  - AlKanafi2025
ER  -