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2020-07 26 Important News

[Academics][Excellent R&D] How to Ensure Structural Safety During Remodeling

Professor Choi Chang-sik (Department of Architectural Engineering) has developed the technology to ensure structural safety when vertically extending buildings. Unlike previous methods, Choi's method strengthens the existing wall structure without adding to or thickening of the walls; thus, it does not reduce the floor space. Out of all residential premises in South Korea, 55 percent are more than 30 years old (figure from 2018). When a building is decrepit, it can either be demolished and reconstructed or partly remodeled. Choi's research aims to deal with problems that arise while remodeling, especially when doing a vertical extension. Professor Choi-Chang-sik (Department of Architectural Engineering) is explaining the reason why shear walls are important when extending a building. To increase the number of floors of a building, many aspects must be considered. These include the vertical weight that will be put on the walls and pillars, horizontal weight which is related to wind and earthquakes, as well as the flexural strength. The taller the building, the more stress is put on the importance of the horizontal weight and flexural strength. The type of wall that is designed to support these two factors is called a shear wall. Choi's method of strengthening sheer walls differs from the previous adhesion-type method in that it does not thicken the walls or increase the number of walls. He first calculates the necessary thickness of the stiffener and cuts out the same size area from the existing wall structure. The stiffener is then applied onto the vacant area. This method gives the advantage that it will not reduce the actual floor space of the living area. Choi explained that the team has successfully finished the technology development as well as completed testing on real-scale structures. The only thing left is to test it on an actual building. "We are currently facing difficulties because there are not many complexes that are willing to try out the new technology. Furthermore, apartments in general do not prefer remodeling over reconstruction, so it is very hard to find an apartment to apply our method on," said Choi. “People feel vague anxiety about reusing an old structure as the base. However, remodeling involves as much technical verification as reconstruction. I hope people can trust the safety of our remodeling method." Hwang Hee-won whitewon99@hanyang.ac.kr

2020-07 20 Important News

[Academics][Excellent R&D] Building a System for Urban Ecosystems

When engineers did urban planning in the past, the feasibility and economic efficacy that it would bring were the top priorities. Recently, however, there has been increasing attention given to environmental factors, and the research on urban ecosystems has gained popularity within the field of urban planning. Professor Oh Kyushik (Department of Urban Planning and Engineering) is building up a spatial decision support system to maintain and manage urban ecosystem services. Professor Oh Kyushik (Department of Urban Planning and Engineering) is creating a platform for the maintenance and management of urban ecosystem services. Oh’s project aims to make a platform that assists with the decision-making process of the government. “What I am trying to do is to connect developmental and environmental issues in one framework,” explained Oh. The professor presented four standards in providing ecosystem services: resilience, buffer power, carbon storage capability, and heat stress mitigation capability. Considering these four standards, Oh collected research data provided by the collaborating labs and incorporated them in a readily accessible platform with an easy-to-use interface. Oh collected research data provided by collaborating labs and incorporated them into a readily accessible platform with an easy-to-use interface. Previously, Oh has been in charge of two national-level research and development projects conducted by the Ministry of Land, Infrastructure, and Transport. However, this was his first time participating in a project conducted by the Ministry of Environment. "The two ministries have some common ground but see from different points of view,” said Oh. He said he was determined to learn and combine both standards through this project. Oh revealed his will to make his research beneficial by reflecting the views of both the Ministry of Land, Infrastructure, and Transport and the Ministry of Environment. Oh reminded the members of Hanyang to look with eyes wide open at the past, but more importantly at the future. “I feel the world is changing at a rapid pace, especially after the coronavirus outbreak,” said Oh. The professor said that the field of urban planning is changing in parallel, as it is a discipline that is deeply related to the daily life of the public. Oh advised students to keep a broad vision and to build up extensive knowledge for the future. Oh Kyu-jin alex684@hanyang.ac.kr