Journal of
the Architectural Institute of Korea

Monthly
  • ISSN : 2733-6239(Print)
  • ISSN : 2733-6247(Online)

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A Study on the Development and Application of Flexible Floor Plan Scenarios for High-Rise Apartments According to the Resident Life Cycle

장인선(Jang, In-Sun) ; 박상민(Park, Sang-Min)

https://doi.org/10.5659/JAIK.2026.42.1.3

High-rise apartments are a representative residential type in urban environments, but traditional wall-framed structures limit the flexibility of interior space due to load-bearing walls. In modern society, the increasing number of single-person households, the expansion of remote work, and the rise of multi-generational cohabitation have significantly heightened the need for adaptable and customizable residential spaces. To address this demand, this study explores the applicability of variable floor plans within column-supported structural prototypes, which offer greater spatial flexibility. The research follows five key steps: (1) establishing a theoretical foundation through an extensive review of previous studies, (2) selecting representative prototypes based on detailed case studies of high-rise apartments, (3) transforming the selected prototypes into column-supported structures, (4) developing adaptable floor plan scenarios based on an expanded seven-stage family life cycle, and (5) evaluating the feasibility of applying these scenarios in real-world settings. This study contributes to the field of sustainable housing by demonstrating the potential for long-term, flexible residential planning. It offers practical design strategies that can accommodate evolving demographic trends and lifestyle needs, providing a foundation for more resilient and future-oriented housing environments.

Urban Axis-Based Design Strategies in the Stuttgart 21 Project

정용화(Jung, Yong-Hwa) ; 박용서(Park, Yong-Seo) ; 이승우(Lee, Seung-Woo)

https://doi.org/10.5659/JAIK.2026.42.1.15

This study examines how urban axes, Pedestrian, Ecological, and Functional, are translated into architectural elements during the design process, focusing on Stuttgart Main Station(SMS). By analyzing official documents including S21, Green-U, and Rahmenplan-IBA27, an analytical framework was developed to trace how each axis is reflected in design outcomes. The findings show that the Pedestrian Axis restores urban continuity by lowering above-ground tracks and integrating transfer and pedestrian flows; the Ecological Axis builds a climate-responsive network through wind corridors, elevated green spaces, and natural ventilation systems; and the Functional Axis expands urban activity by linking the new and old station structures with the Rosenstein area through mixed-use development. Together, the three axes operate as a complementary system addressing urban discontinuity, environmental and climate needs, and functional expansion, ultimately forming a mediating structure between policy, urban planning, and architectural design. The study provides foundational insights for railway-station-centered urban integration and data-driven design strategies.

Demographic Shifts in Regional Cities After Industrial Cluster Development

이다니엘(Lee, Daniel) ; 김서영(Kim, Seoyoung) ; 손동욱(Sohn, Dong-wook)

https://doi.org/10.5659/JAIK.2026.42.1.27

Local cities in Korea are facing growing challenges such as population decline, aging, and the outmigration of younger residents. In response, industrial complex clusters have been established as a strategic policy measure. This study quantitatively examines changes in population structure before and after the formation of industrial complex clusters in five local cities, using public demographic data from clusters established in 2005 and 2008. The analysis shows that Ochang and Gunsan experienced positive effects on total and working-age populations, supported by the combination of industrial development and residential infrastructure. In contrast, Gumi and Changwon displayed limited population inflow due to weak connections with surrounding living zones. The Daebul case showed minimal impact, largely attributed to an aging population and insufficient residential infrastructure. These findings indicate that living infrastructure and demographic composition are key factors in determining the success of industrial complex clusters. By examining the demographic impacts of cluster development from multiple perspectives, the study provides a foundation for designing tailored and sustainable cluster policies in local cities.

Topology and Contemporary Architecture

이상윤(Lee, Sang-Yun)

https://doi.org/10.5659/JAIK.2026.42.1.39

This study investigates how the concept of topology has been applied to and adapted in contemporary architectural design, focusing on its spatial and interpretive implications through a case study analysis of representative projects by BIG, OMA, and SANAA. Employing a qualitative case study method, the research compares and analyzes the influence of topological thinking on spatial configuration and its interpretation since the 21st century, exploring the transformation of key topological concepts?such as continuity, connectivity, and transformability?into fundamental design principles. The analysis is based on rigorously selected projects that integrate diverse programs, urban contexts, and user experiences, utilizing reliable documentation such as drawings, photographs, and interviews. It reveals how topological diagrams, which visualize abstract relational structures, have made concrete contributions to architectural typology and spatial strategies. The results demonstrate that these architects implement topological relations and flexibility in various ways?for instance, in the dissolution of spatial boundaries, non-linear circulation, multi-centric programming, and open systems?thereby showing that topology functions not simply as a formal experiment but as a practical strategy for addressing complex contemporary social and urban conditions.

Nonlinear Relationship Analysis of Factors Affecting Apartment Common Maintenance Costs

최규진(Choi, Kyujin) ; 김서영(Kim, Seoyoung) ; 이다니엘(Lee, Daniel) ; 오경호(Oh, Kyungho) ; 손동욱(Sohn, Dong-Wook)

https://doi.org/10.5659/JAIK.2026.42.1.51

In South Korea, apartment complexes dominate the housing landscape, and rising common maintenance fees have emerged as a significant social concern. This study examines the factors influencing common maintenance costs in apartment complexes and investigates their nonlinear patterns using XGBoost and SHAP. The analysis highlights several findings. Building age shows a threshold effect, with costs increasing sharply after 30 years. Complexes with more than 450 units demonstrate lower costs, while the number of buildings has little impact. Taller buildings, particularly those exceeding 27 floors, are linked to higher expenses. In terms of management, contracted services and individual heating systems are associated with lower costs, whereas sale-based ownership tends to raise them. Layout also plays a significant role: staircase-type corridors are associated with higher costs, as are complexes with parking capacity above 1.2 vehicles per unit or CCTV coverage above 0.2 cameras per unit. The absence of community facilities further contributes to increased costs. By moving beyond linear assumptions, this study identifies thresholds and inflection points in critical variables, thereby offering practical insights for housing policy, remodeling priorities, management efficiency, and cost-conscious apartment design.

An Empirical Study on Hyperreality in Architectural Visualization and the Limits of Expert Perception in the Age of AI

설유경(Seol, Yoo-Kyung)

https://doi.org/10.5659/JAIK.2026.42.1.61

This study examines the hyperreality produced by AI-generated imagery in architectural visualization. Thirteen architectural professionals with at least fifteen years of experience evaluated forty-eight images, half created by AI and half captured as photographs. The overall accuracy rate was 52.40 percent, a result statistically indistinguishable from chance at 50 percent, showing that experts cannot reliably distinguish AI-generated images from real photographs. Authentic architectural photographs, especially exterior shots, which showed an accuracy rate of 42.31 percent, were misidentified as artificial more often than the AI-generated images themselves. This supports Baudrillard’s concept of simulacra in architectural visualization, in which AI imagery becomes hyperreal and appears more convincing than reality, signaling a displacement of the real by simulation. Metacognitive results showed notable distortions. Although participants reported high confidence, averaging 3.87 out of 5, the relationship between confidence and accuracy was minimal. The Cognitive Dissonance Index showed that 92.31 percent of participants were overconfident, and 41.28 percent of their highest-confidence judgments were incorrect. These outcomes indicate that experts lack accurate awareness of their evaluative abilities. Overall, the findings reflect a major shift in the era of AI-driven architectural visualization. As AI imagery becomes indistinguishable from physical reality, traditional authenticity-based evaluation loses relevance. Future assessment approaches must focus on communicative clarity and interpretive value. This study offers empirical evidence of AI’s transformative influence on architectural visualization and highlights the urgent need for new critical methods and educational frameworks suited to hyperreal environments.

Comparative Analysis of Factors Influencing Housing Vacancy in the Cities and Counties of Jeonbuk State

김용균(Kim, Yong-Gyun) ; 서기춘(Seo Ki-Chun)

https://doi.org/10.5659/JAIK.2026.42.1.71

This study aims to identify temporal shifts in the determinants of rural housing vacancy. We analyze two cross-sections (2015, 2023) for 14 counties in Jeonbuk Province using harmonized indicators from public statistics. Methods include Pearson correlations and stepwise multiple regression with backward elimination, accompanied by diagnostics for normality, multicollinearity, and the Durbin?Watson statistic. Results show a pivot from supply-driven drivers in 2015?proxied by housing supply rate and fiscal capacity?to quality- and mobility-driven factors in 2023?proxied by the proportion of old housing and net migration; the correlation structure likewise reorients from vacancy?supply to vacancy?aging and vacancy?migration linkages. Taken together, the findings indicate that effective responses should prioritize safeguarding and activation of existing stock, grade-based management and adaptive reuse of aged housing, and removal of conversion barriers (inheritance, registration, transaction), while a four-axis framework?stock volume, stock quality, convertibility, and demand selectivity?can guide community-based governance and resilience-oriented regeneration under demographic decline.

An Analysis of Spatial and Operational Characteristics of Closed Urban Schools

최준수(Choi, Jun-Soo) ; 이경선(Lee, Kyung Sun)

https://doi.org/10.5659/JAIK.2026.42.1.81

This study examines the spatial and operational characteristics of closed urban schools and proposes guidelines for their adaptive reuse. A review of prior research identified domestic trends and gaps, leading to the development of an analytical framework. This framework was applied to cases in Tokyo where closed schools have been repurposed as public facilities. Empirical, site-based evidence collected through field visits and interviews with facility operators was coded and categorized using ATLAS.ti. The analysis identified eight core factors? including alignment with local demand; program integration and operational flexibility; preservation of original spatial structures with purpose-driven transformations; and clear role delineation between asset owners and operators?and prioritized them using Pareto analysis. These findings inform spatial and operational guidelines for the reuse of closed urban schools. The evidence-based framework and prioritization process provide empirical support for conversion and management strategies in dense urban contexts. Limitations of the study include the restricted geographic scope and sample size; future research should expand to diverse urban settings and incorporate complementary quantitative analyses.

A Study on Housing Environment Improvement through a Resident Survey in Long-Term Public Rental Housing

최민찬(Choi, MinChan) ; 조승연(Cho, SeungYeoun)

https://doi.org/10.5659/JAIK.2026.42.1.93

This study examines facility improvement needs in long-term public rental housing in Korea, where the government has increased supply to stabilize housing for low-income households but now faces challenges from aging buildings and limited maintenance budgets. A survey of 2,597 households assessed satisfaction levels and priority needs for both common facilities and interior units. Satisfaction with common facilities averaged 3.75, with higher scores among one-person elderly households, male elderly residents, and households that include older adults. The most urgent needs involved safety, especially installing or replacing handrails on ramps and upgrading CCTV systems. Interior facility satisfaction averaged 3.70, also generally positive, but residents expressed strong demand for wallpaper and flooring replacement. Cross-tabulation analysis showed significant differences across household types: for common areas, ramp and handrail improvements were consistently prioritized, while for interiors, vulnerable households highlighted the need for accessibility features such as safety handrails. Overall, the findings indicate that facility improvement projects in long-term public rental housing should prioritize safety-related upgrades inside units and in shared spaces, reflecting the aging condition of the housing stock and the needs of vulnerable residents.

A Study on Antoni Gaudi’s Architectural Characteristics Manifested in Thomas Heatherwick’s Architecture

전하빈(Jeon, Ha-Been) ; 장용순(Chang, Yong-Soon)

https://doi.org/10.5659/JAIK.2026.42.1.103

Contemporary urban architecture is often criticized for visual monotony and homogenized experience. Responding to this problem, and to Thomas Heatherwick’s diagnosis of a “blandemic,” this study argues that the relationship between Gaudi and Heatherwick should be understood not in terms of visual resemblance but as a higher-order methodology linking rule extraction, sectional co-determination, and the organization of public experience. Rather than positing a direct line of influence, the research investigates methodological affinities by organizing prior studies on both architects into an analytical framework of biomimicry, regionality, and form?structure integration and applying it to four of Heatherwick’s built projects. The analysis shows that both architects treat nature not as a stock of images but as a repository of operative rules, and read site, climate, materials, and urban flows as variables that organize form, layout, and microclimate. In both cases, structural equilibrium, sectional decision-making, and environmental performance are coordinated within an internal order that privileges continuous variation over simple repetition. While Gaudi develops rule-based generation through equilibrium-driven geometries and the integration of ornament, structure, and passive performance, Heatherwick extends these logics through prototyping- and fabrication-led processes, rule-based terracing and vertical greening, and the linkage of buildings to urban pedestrian loops. The study proposes a comparative analytical language that traces correspondences beyond visual likeness and offers rule-based design criteria for recovering sensory richness and a robust sense of place in contemporary architectural practice.