간행물
한국대공간건축 논문집(구 한국공간구조학회지) KCI 등재 Korean Journal of Spatial Architecture
- 발행기관 한국공간구조학회
- 자료유형 학술지
- 간기 계간
- ISSN 3092-4251 (Print)3092-4413 (Online)
- 수록기간 2001 ~ 2026
- 주제분류 공학 > 건축공학 공학 분류의 다른 간행물
- 십진분류KDC 540DDC 690
권호리스트/논문검색
제26권 제3호 통권105호 (2026년 9월) 10건
1.
2026.09
구독 인증기관 무료, 개인회원 유료
신승훈, 오지훈, 우종열, 박수용
Recent earthquakes (2016 Gyeongju and 2017 Pohang) revealed the seismic vulnerability of existing non-seismicallydetailed reinforced concrete (RC) school buildings in Korea. This study proposes and experimentally verifies an CFT-column seismic retrofit method, in which concrete-filled steel tube (CFT) columns are anchored to existing RC columns and connected by a steel beam at the column mid-height. To examine the effect of infilling the CFT columns, three full-detail specimens—non-retrofitted (NRF), mortar-filled retrofitted (IFRF), and unfilled retrofitted (IERF)—were fabricated based on 1980s non-seismic school-building details and tested under displacement-controlled cyclic loading. The hysteretic behavior, strength, stiffness, energy dissipation, and failure modes were compared, and the envelope curves were idealized using the equivalent energy elastic-plastic (EEEP) model. Relative to NRF, the retrofitted specimens showed about 3.3 times higher effective stiffness, 3.3–3.5 times higher strength, ductility increasing from 2.07 to 2.99–3.20, and 742–815% higher energy dissipation.
4,300원
2.
2026.09
구독 인증기관 무료, 개인회원 유료
이승재, 이돈우
The construction sector is increasingly pressured to reduce embodied carbon, and long-span roof trusses—heavy consumers of structural steel—represent a critical target for decarbonization. Replacing selected steel members with glued laminated timber offers a promising pathway, yet current practice simply substitutes materials while retaining the geometry optimized for all-steel trusses. This study questions whether such an approach is adequate and reveals a systematic carbon penalty that has been overlooked. Through parametric analysis of Warren and Pratt roof trusses across practical spans (24-80 m) and Monte Carlo simulation accounting for the inherent variability of timber properties, the study demonstrates that timber-steel hybrid trusses favor fundamentally different optimal geometries—taller with fewer panels—than their all-steel counterparts. Ignoring this divergence sacrifices roughly one-third of the achievable carbon savings, and the penalty is shown to be robust under realistic material uncertainty. A set of simplified design formulas is proposed to help engineers rapidly identify the correct hybrid geometry without running a full optimization, bridging the gap between research insights and everyday design practice.
4,000원
3.
2026.09
구독 인증기관 무료, 개인회원 유료
성종혁, 이돈우, 이승재
This study develops a mixed-integer linear programming (MILP) formulation to minimize the global warming potential (GWP) of timber-steel hybrid truss structures. Based on Hull Reformulation, it addresses the weak LP relaxation commonly observed in conventional Big-M models. Although the Big-M formulation gives correct integer solutions, its relaxed problem may allow members with zero cross-sectional area to carry internal forces, resulting in an unrealistically low best bound. To avoid this issue, each member's internal force is divided into timber and steel components, and corresponding stress constraints are imposed in proportion to the effective cross-sectional area of each material. The bilinear product between the cross-sectional area and the binary material variable is linearized using the McCormick envelope. Numerical examples show that the proposed formulation provides much tighter bounds than the Big-M model. In the two-dimensional cantilever example, both formulations obtained the same optimum of 25.72 kgCO2e, but the Big-M model retained a 72.38% optimality gap, while the Hull formulation reached a 0% gap in about 0.3 s. In the three-dimensional cantilever example, the Big-M gap increased to 99.99%, whereas the Hull formulation again converged to a 0% gap. Across all examples (cantilever and simply supported), the hybrid designs achieved approximately 9–12% GWP reductions compared with all-steel designs.
4,000원
4.
2026.09
구독 인증기관 무료, 개인회원 유료
홍준서, 주현진
This study evaluates the load-carrying capacity of a plate-reinforced permanent steel formwork attached to an H-shaped steel girder under construction loads. Four specimens with different reinforcing plate configurations were tested under monotonic loading, and the results were compared with nominal strengths calculated according to the Korean Design Standards (KDS 41 31 00). All specimens failed by local buckling of the reinforcing plates. Specimens with irregular reinforcing plate configurations showed higher load-carrying capacities than those with rectangular plates. The experimental strengths exceeded the calculated strengths by 1.44-2.16 times, indicating that the current design method provides a conservative assessment. Based on the test results, a correction factor of 1.3 is proposed for a more rational evaluation of the construction-stage performance of permanent steel formwork systems.
4,000원
5.
2026.09
구독 인증기관 무료, 개인회원 유료
신동현
This study investigates the effect of steel material properties on the structural behavior of steel plate shear walls through nonlinear finite element analysis. Steel plate shear walls initially resist lateral loads through the shear resistance of the infill plate. After buckling occurs, however, additional lateral resistance is developed through the formation of a diagonal tension field. Therefore, the post-buckling behavior of steel plate shear walls can be significantly affected not only by geometric parameters but also by material properties such as yield strength, tensile strength, elongation capacity, and cyclic hardening characteristics. In this study, a finite element model of a steel plate shear wall was established based on existing experimental results, and its validity was verified by comparison with cyclic loading test results. Subsequently, the load-displacement relationship, principal stress distribution, and tension field formation were comparatively analyzed for conventional steel and low-yield-point steel. The analysis results showed that the steel plate shear wall using conventional steel tended to exhibit localized tension field formation after buckling due to its relatively high yield strength, and the stability of the hysteretic behavior varied depending on the geometric conditions. In contrast, when low-yield-point steel was used, plastic deformation was distributed over a wider region of the infill plate owing to its low yield strength and high ductility. As a result, the formation of multiple tension fields was promoted, leading to more stable post-buckling load resistance and hysteretic behavior.
4,000원
6.
2026.09
구독 인증기관 무료, 개인회원 유료
김현수, 김유경, 안시현, 신진아
This study presents the development of an integrated software program that evaluates the seismic fragility of nuclear power plant (NPP) structures using a large language model (LLM). The program combines machine learning (ML)-based prediction of concrete aging deterioration and seismic floor response with a Monte Carlo simulation-based seismic fragility assessment, and integrates them into a single web-based environment. A distinctive feature of the program is an artificial intelligence assistant built upon an LLM and retrieval-augmented generation (RAG); it interprets natural-language queries, automatically invokes the relevant prediction and fragility-assessment tools, and generates answers together with supporting evidence retrieved from technical documents and automatically produced fragility curves. The ML modules predict chloride diffusion, carbonation, thermal effects, and floor response spectra, and recommend the best-performing algorithm automatically, while the fragility module derives lognormal fragility curves and supports aging-degradation scenarios. By connecting deterioration prediction, response prediction, fragility assessment, and literature-based reasoning into one conversational workflow, the developed program significantly lowers the technical barrier for ML-based seismic fragility evaluation and improves both accessibility and reliability. The overall architecture, development environment, and main functions of the program are described in detail.
4,000원
7.
2026.09
구독 인증기관 무료, 개인회원 유료
정연백
This study evaluates the life cycle CO₂ emissions of concrete structures using recycled aggregates to support carbon neutrality in the construction industry. A life cycle assessment (LCA) was conducted on a 12-story reinforced concrete building in Seoul, encompassing stages from raw material extraction, transportation, concrete production, and construction, to a 40-year usage period (accounting for carbonation-induced CO₂ uptake), demolition, and waste processing. The assessment compared major structural members (columns, walls, beams, and slabs) based on two distinct environmental impact inventory categories: the 'Upper Level' (reflecting production process uncertainties) and the 'Lower Level' (assuming high-efficiency, optimized manufacturing processes). The results reveal a dual-faceted environmental impact of recycled aggregates. Under Upper Level conditions, the recycled aggregate concrete mixes increased life cycle CO₂ emissions by 25% to 34% compared to standard conventional concrete due to high material emission coefficients. Conversely, under Lower Level conditions, recycled aggregate concrete achieved comparable or reduced CO₂ emissions compared to conventional mixes. The findings demonstrate that to successfully implement low-carbon designs using recycled aggregate concrete, technical advancements must focus on controlling energy consumption during the aggregate production and refining processes to stabilize inventory data at the Lower Level.
4,000원
8.
2026.09
구독 인증기관 무료, 개인회원 유료
김재현, 주효은, 이윤정, 한선진
This study proposes a refined joint shear strength model for exterior reinforced concrete beam-column connections with headed bars. A database consisting of 44 exterior reinforced concrete beam-column connection specimens with headed bars and exhibiting joint shear failure was established. The experimentally measured joint shear strengths were compared with predictions obtained from an existing model. The average ratio of experimental strength to model prediction was 0.775, indicating that the existing model generally overestimated the joint shear strength of connections with headed bars. Parameters associated with the headed bar anchorage requirements of ACI 318-25 showed no distinct relationship with the observed prediction errors. In contrast, parameters related to joint confinement and the embedment ratio of headed bars exhibited noticeable trends. Based on these observations, a refined joint shear strength model was proposed by modifying the exponent of the beam reinforcement index and introducing adjustment factors associated with joint transverse reinforcement and headed bar embedment. Application of the proposed model reduced the average prediction error from 22.5% to 1.6% and the coefficient of variation from 0.190 to 0.120.
4,500원
9.
2026.09
구독 인증기관 무료, 개인회원 유료
주효은, 강진석, 조원정
This study investigated the effect of accerelated carbonation on the pore structure of fly ash (FA) blended cement paste, focusing on FA replacement ratio and curing age. Cement paste specimens with FA replacement ratios of 15, 45, and 65% were cured for 35 and 112 days and subjected to accelerated carbonation. The capillary and gel porosity were separately measured using an oven-drying method, and the phase assemblage was quantified by Rietveld refinement of XRD data. In addition, the stoichiometric volume change due to carbonation was estimated based on the Ca/Si ratio of the CSH, which varies with the fly ash replacement ratio and curing days. After carbonation, the capillary porosity decreased in all mixtures, whereas the gel porosity exhibited contrasting behavior depending on the curing age, increasing in the FA15 and FA45 specimens cured for 112 days. Although the estimated stoichiometric volume increase occurred in all mixtures, its amount did not directly correspond to the measured porosity change, especially in the specimens cured for 112 days. These results indicate that the carbonation-induced pore structure change is governed not solely by the total stoichiometric volume increase but by whether pore filling by carbonation products (CaCO₃and silica gel) or the pore formation associated with gel structure reorganization dominates. In particular, in high-replacement FA systems, carbonation-induced pore structure changes should not be interpreted as simple pore densification by CaCO₃formation.
4,000원
10.
2026.09
구독 인증기관 무료, 개인회원 유료
박소정, 이소영, 문주현, 정연백
This study evaluated the effect of eccentricity ratio according to plan types on the seismic performance of school buildings based on design drawings from the 1980s. The analytical models reflected school buildings constructed based on the standard design drawings of the 1980s, and the main variables were set as ┣┫, ━, ┏━, and ┏┛ plan types. Seismic performance was analyzed based on performance points, plastic hinge distribution, axial load sharing ratio, and inter-story drift ratio. The results showed that the ┣┫ and ━ type structures with low eccentricity ratios secured stable behavior and member performance at the IO level, whereas the ┏━ type structure with a high eccentricity ratio showed a tendency for seismic performance deterioration with collapse-level members concentrated on the first floor. In addition, the ┏┛ type structure exhibited collapse-level members despite a relatively low eccentricity ratio, and performance points were not formed in some directions, indicating insufficient seismic performance. Therefore, the eccentricity ratio according to plan type needs to be considered as a key factor in evaluating the stable seismic performance of school buildings.
4,200원
