Abstract
Since 2016, the frequency and scale of earthquakes have been rapidly increasing in South Korea. In particular, the damage caused by the Gyeongju and Pohang earthquakes has attracted considerable attention since 2017, leading to changes in social insensitivity to safety and the perception of seismic damage to facilities. However, the current risk assessment technology for earthquake-damaged buildings is subjective and inaccurate, as it is based on visual inspection for a limited time. Accordingly, this study focuses on improving the method of analysis of disaster-damaged buildings. To this end, the study analyzes the risk factors of earthquake-damaged buildings by comparing point cloud data using 3D scanning technology with Building Information Modeling (BIM) spatial information, which is based on the existing design information. To apply this technology, existing design information was acquired through BIM modeling of the existing 2D design drawings of Building E in the Daeseong Apartment Complex (located in Heunghae-eup, Pohang City). This study is expected to contribute to improving the efficiency of measurement technology for earthquake-damaged buildings by analyzing old buildings’ BIM-based 3D modeling visualization information without drawing information, and thus improving the accuracy of seismic damage risk measurement by scanning point cloud data.
Highlights
Since the late 1900s, the frequency and severity of natural disasters—including global warming-related events, storms, and floods—have been accompanied by an increase in the scale of damage
This is because there was no internal column and only the walls were designed to bear the load of the Daeseong Apartment Complex ground floor
The walls, which were constructed by stacking bricks, were vulnerable to seismic loads due to insufficient wall volume caused by the weak Rahmen structure. This phenomenon resulted from the apartments’ unique structure; that is, the Daeseong Apartment Complex was constructed without the application of seismic design, and it appears to have been affected by the piloti structure, in which the ground floor’s load-bearing walls are supported by the short lower columns
Summary
Since the late 1900s, the frequency and severity of natural disasters—including global warming-related events, storms, and floods—have been accompanied by an increase in the scale of damage. Over the last three decades, 2.5 million human lives have been lost worldwide as a result, leading to damage worth four trillion dollars [1]. In South Korea, this damage totals approximately 500 billion won, and an annual average of 1100 billion won has been spent on restoration over the last ten years (2006–2015). Property damage amounts to approximately 920 billion won on average per year [2]. As there have been more incidences of unpredictable natural and social disasters recently, thorough management and countermeasures need to be developed to prepare for them
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