• Computers and Concrete
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• v.33 no.5
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• pp.509-518
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• 2024

In this study, we investigated the effect of shear-key placement on the performance of grouted connections in offshore wind-turbine structures. Considering the challenges of height control during installation, we designed and analyzed three grouted connection configurations. We compared the crack patterns and strain distribution in the shear keys under axial loading. The results indicate that the misalignment of shear keys significantly influences the ultimate load capacity of grouted connections. Notably, when the shear keys were positioned facing each other, the ultimate load decreased by approximately 15%, accompanied by the propagation of irregular cracks in the upper shear keys. Furthermore, the model with 50% misalignment in the shear-key placement exhibited the highest ultimate strength, indicating a more efficient load resistance than the reference model. This indicates that tensile-load-induced cracking and the formation of compressive struts in opposite directions significantly affect the structural integrity of grouted connections. These results demonstrate the importance of considering buckling effects in the design of grouted connections, particularly given the thin and slender nature of the inner sleeves. This study provides valuable insights into the design and analysis of offshore wind-turbine structures, highlighting the need for refined design formulas that account for shifts in shear-key placement and their structural implications.

• Solar Energy
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• v.8 no.1
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• pp.57-67
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• 1988

The task, development of the exemplary patterns for the application of passive solar systems in residential buildings, is very crucial regarding government policies toward energy conservation. So various measurements, evaluation, and feasibility studies are performed in addition to their architectural design and detailed drawings. In conclusion, passive solar systems are effective and economical when they are applied to residential buildings for heating systems.

• Journal of Internet Computing and Services
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• v.6 no.4
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• pp.9-20
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• 2005

To design a software system in success, architectural approaches which are in basis of architectural design, must be primarily selected. What to chose among various architecture styles as specific as architectural approaches, varies along with the system status of what kind of functional or non-functional quality requirements should satisfy. In this study, we propose the evaluation model for making a selection of architectural approaches, and select an architectural approach for message system actively using in diversified internet utilization and enterprise application integration, In other words, if there may be possibly existed several architectural approaches, we present the most suitable method of architectural approach out of them through an evaluation of analyzing the system requirements satisfaction level. In addition, when it performs specific design and implementation utilizing design patterns based on thread, developers would be able to link up the architecture design directly.

• Journal of Digital Convergence
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• v.15 no.1
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• pp.443-452
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• 2017

Architectural history traces the changes in architecture through various traditions, regions, overarching stylistic trends, and dates. This study identified terminologies related to the proximity and frequency in the architectural history areas by text mining and association analysis. This study explored terminologies by investigating articles published in the "Journal of Architectural History", a sole journal for the architectural history studies. First, key terminologies that appeared frequently were extracted from paper that had titles, keywords, and abstracts. Then, we analyzed some typical and specific key terminologies that appear frequently and partially depending on the research areas. Finally, association analysis was used to find the frequent patterns in the key terminologies. This research can be used as fundamental data for understanding issues and trends in areas on the architectural history.

• Journal of Agricultural Extension & Community Development
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• v.18 no.2
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• pp.281-313
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• 2011

67.82% of domestic hot springs are in rural areas. (Ministry of Public Administration and Security statistics, 2010) Most of hot spring's facilities are aging and inability to accommodate the current changes of leisure patterns. So, a decrease of the number of visitor to the hot spring resulted in economic decline of rural areas. Hot spring has been studied, but Architecture of Hot Springs has never been interested in and research. Therefore, Nation architecture of Hot spring and foreign architecture was compared and analyzed. Then, Architectural characteristics of Hot spring in rural areas was identify. The architecture of Hot spring type of foreign and images are routinely burned, the organic form and old-fashioned adrift. However, our country found in Hot spring architecturally and daily life had any features. Thus, the country's hot springs spa area for construction of the architecture design should be characterized. And, through institutional guidelines and deliberations should be provided in the right direction.

• Journal of the Korean Institute of Rural Architecture
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• v.15 no.2
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• pp.9-16
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• 2013

This paper is to discover how the photogrammetry method can be utilized for recording modern architectural properties. As a result of conducting photogrammetry aimed at the main building and water supply tower of Goesan Middle School, it was possible to measure actually either complicated patterns or a damaged area on the facade. However, there appeared errors in the actual measurement of the hollow or protruded area on the facade to measure actually or of an object in the cylinder form. First, for the actual measurement of the protruded area, it is possible to complete a facade by measuring actually the protruded area separately after dividing it and complementing it on the facade, Second, concerning an object in the cylinder form, it is possible to complete one facade by matching a facade which is measured actually with a Diaver method among the MSR photogrammetry methods, and three dimensional standard coordinates which are obtained through Totalstation.

• Journal of Korean Association for Spatial Structures
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• v.18 no.3
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• pp.117-124
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• 2018

In the post-tensioned concrete member, additional reinforcement is required to prevent failure in the anchorage zone. In this study, the details of reinforcement suitable for the anchorage zone of the post-tensioned concrete member using circular anchorage was proposed based on the experimental results. The tests were conducted with the compressive strength of concrete and reinforcement types as variables. The experimental results indicated that the additional reinforcement for the anchorage zone is required when the compressive strength of concrete is less than 17.5 MPa. U-shaped reinforcement shows most effective performance in terms of maximum strength and cracks patterns.

• Journal of Korean Association for Spatial Structures
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• v.14 no.2
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• pp.41-50
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• 2014

The stone pagoda of Mireuk temple site is currently restoring through the repairing process. This stone pagoda has the various construction types in the inner and outer space. Therefore, the stress concentration and structural behavior need to be considered through the analysis of various construction patterns. To this end, this study presents the structural modelling and analysis considering the discrete element analysis technique to solve the discontinuum behavior between the stone elements. Also, this study performs the structural performance evaluation through the various design variables for the safety of stone pagoda. Through the analysis results, we can find out the small stress concentration in the several members. But, because the stresses and displacements are relatively small, we can secure the safety of the whole structure.

• Structural Engineering and Mechanics
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• v.33 no.3
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• pp.261-284
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• 2009

The seismic behavior of a framed structure with chevron-type buckling restrained braces was investigated and their behavior factors, such as overstrength, ductility, and response modification factors, were evaluated. Two types of structures, building frame systems and dual systems, with 4, 8, 12, and 16 stories were designed per the IBC 2003, the AISC LRFD and the AISC Seismic Provisions. Nonlinear static pushover analyses using two different loading patterns and incremental dynamic analysis using 20 earthquake records were carried out to compute behavior factors. Time history analyses were also conducted with another 20 earthquakes to obtain dynamic responses. According to the analysis results, the response modification factors turned out to be larger than what is proposed in the provision in low-rise structures, and a little smaller than the code-values in the medium-rise structures. The dual systems, even though designed with smaller seismic load, showed superior static and dynamic performances.

• Journal of Korean Association for Spatial Structures
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• v.19 no.1
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• pp.93-100
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• 2019

There has been considerable recent interest in deep learning techniques for structural analysis and design. However, despite newer algorithms and more precise methods have been developed in the field of computer science, the recent effective deep learning techniques have not been applied to the damage detection topics. In this study, we have explored the structural damage detection method of truss structures using the state-of-the-art deep learning techniques. The deep neural networks are used to train knowledge of the patterns in the response of the undamaged and the damaged structures. A 31-bar planar truss are considered to show the capabilities of the deep learning techniques for identifying the single or multiple-structural damage. The frequency responses and the elasticity moduli of individual elements are used as input and output datasets, respectively. In all considered cases, the neural network can assess damage conditions with very good accuracy.