محمدرضا خليليان بروجني

Considering the numerous incidents and damages that occur annually across the world, leading to the destruction of buildings, various structures, and even historical monuments, as well as the critical importance of preventing such damages and the associated financial and human losses—a key responsibility and objective of engineers globally—and given the lack of sufficient studies in the area of assessing the various factors affecting the risk of building collapse, this study was initiated with the goal of investigating these factors. In this study, recurring factors in building collapses prior to 2023 (around 100 incidents) were extracted using a novel thematic analysis approach, which is a new method for such research. After categorizing and identifying the key factors in the final thematic table, a questionnaire—derived from a thematic analysis checklist and incorporating expert opinions—was employed to identify and analyze the most frequent and impactful factors. The results revealed the following: • Factors like "neglect of past incidents" and "lack of regular and effective inspections" were identified as having a significant influence on increasing the risk of building collapse. •"Non-compliance with safety standards" and "incompetence of project personnel" were also determined to have a high impact on the consequences of collapse risk. •"Lack of quality control of materials during construction" and "failure to anticipate and prepare for natural hazards" were found to significantly contribute to the inability to detect collapse risks early. Based on the findings, the theme of safety emerged as one of the most influential themes affecting the risk of building collapse. To ensure the accuracy of the results, fault tree analysis (FTA) was utilized. However, contrary to the conventional approach where the fault tree is initially drawn based on the researcher’s discretion and then the roots of the risks are eva‎luated, this study followed a new and different path, where the fault tree's structure was adjusted based on expert opinions. One valuable outcome of this research is the development of a fault tree using this innovative method, where, unlike traditional subjective approaches, the tree is constructed based on expert survey results.

عوامل ريسك , تحليل تماتيك , درخت خطا , احتمال , پيامد , بررسي ريسك , فروريزش ساختمان

risk factors , thematic analysis , fault tree , probability , consequence , risk assessment , building collapse

Mohammadreza Khalilian Boroujeni

Dr Hassan Malekitabar