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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Architectural Institute of Korea Structure & Construction
Journal Basic Information
Journal DOI :
Architectural Institute of Korea
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Volume & Issues
Volume 31, Issue 12 - Dec 2015
Volume 31, Issue 11 - Nov 2015
Volume 31, Issue 10 - Oct 2015
Volume 31, Issue 9 - Sep 2015
Volume 31, Issue 8 - Aug 2015
Volume 31, Issue 7 - Jul 2015
Volume 31, Issue 6 - Jun 2015
Volume 31, Issue 5 - May 2015
Volume 31, Issue 4 - Apr 2015
Selecting the target year
Edge Distance of Metal Rod Reinforced Flexural Members in the Stone Pagoda of the Mireuk Temple Site
Lim, Woo-Young ; Lee, Dong-Sik ; Hong, Sung-Gul ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 3~13
DOI : 10.5659/JAIK_SC.2015.31.6.3
The purpose of this study was to estimate the edge distance of metal rod reinforced flexural members in the Stone Pagoda of the Mireuk Temple Site. Flexural tests for forty reinforced granite members were performed to evaluate the flexural strength depending on the area of metal rod and edge distance. In addition, uniaxial compression and tension tests were conducted to obtain the material properties of the granites and the metal rods. The flexural strength and design flexural moment strength for the reinforced granite members were proposed. The predicted flexural strength was agreed well with the test results. The minimum reinforcement ratio was also proposed by using the brittleness number (
). In order to inhibit brittle failure, the brittleness number for reinforced granite stones should be 0.1 ~ 0.3. The edge distance of the reinforced flexural members with metal rods was proposed by depending on the area of the metal rods based on the test results.
Modal Parameter Estimation of a Building Structure Using a Virtual 1-DOF Mass Tuner in Frequency Domain
Hwang, Jae-Seung ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 15~22
DOI : 10.5659/JAIK_SC.2015.31.6.15
The aim of this study is to propose a new output-only system identification technique using a virtual 1-DOF mass tuner(VMT) which is analogous to the tuned mass damper and has a characteristics to amplify the response of the measured acceleration responses of building structure. The VMT is a kind of modal filter that its response is maximized in the range of the natural frequency of a structure, and damping ratio of the structure can be identified using the response ratio of VMT at the different damping ratios consisting the VMT. Also, it is shown that the modal parameters can be precisely estimated if the VMT were applied to the mode response separated with mode decomposition method in the state space. For the verification of the proposed technique, the identification process is applied to the measured acceleration responses from 40 story steel frame structure when typhoon approached to the building. From the numerical simulation, it is found that the modal responses are well separated in the state space, the modal parameters are precisely identified with the proposed modal property estimation method.
A Study on the Quality Improvement Strategies of Design through Analyzing the Domestic Modular Housing Cases
Jun, Young-Hun ; Kim, Kyoon-Tai ; Lee, Young ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 23~31
DOI : 10.5659/JAIK_SC.2015.31.6.23
This research aims to identify the design characteristics of modular housing and suggests strategies to improve the design quality at the design phase of the modular housing. For this, we derived 12 different design factors which have impacts on the design quality through interviewing field experts and defined 6 types of analysis criteria. In addition, we arranged relation matrix between the design factors and the analysis criteria. Futhermore, we analyzed the domestic modular housing cases in terms of the matrix. Thus, we set up 24 quality improvement strategies of design in consequence of analyzing modular housing cases.
Assessment for the Physiological Workload of Warterproof Workers
Lim, Tae-Kyung ; Park, Sang-Min ; Lee, Dong-Eun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 33~41
DOI : 10.5659/JAIK_SC.2015.31.6.33
Measuring and evaluating the workload occurred to construction worker have not been arrived at a certain maturity because it is not easy to standardize construction operations and these operations are subject to dynamic changes. This paper presents a method that measures quantitatively the workload demanding to the workers engaged in waterproof operation and tests for statistical significant differences among the unit tasks associated with the operation. Three hypotheses involved in the unit tasks (e.g., a primer painting and a polyurethane coating) are established as follows: [Hypothesis 1] Given a same amount of work, the average heart rate occurred to the worker engaged in the urethane coating task is higher than that in the primer painting task. [Hypothesis 2] Given a same amount of work, the average break time required to the worker engaged in the polyurethane coating task is longer than that in the primer painting task. [Hypothesis 3] When measured immediately after completing the two tasks, the body parts that the workers feel uncomfortable were arm (t = 2.449) with statistically significant difference; neck (t = 0.632), shoulder (t = 0.000), waist (t = 1.987) and wrist (t = 0.655) with statistically no significant difference.
Properties of Inorganic Binder Using the Blast Furnace Slag and Polysilicon Sludge
Lim, Jeong-Geun ; Lee, Sang-Soo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 43~50
DOI : 10.5659/JAIK_SC.2015.31.6.43
Recently, with development of the industry the globally Global warming is accelerating. Further, to the due depletion of natural resources, have been made many efforts to produce green energy. In particular, solar power generation industry has grown rapidly at an annual average rate of over 42%, the fastest rate. But, is generated sludge about 2tons in order to produce 1ton in the solar power generation used main material polysilicon. In this way, the arising sludge there is not method recycling and it is all discarded. Therefore, in the present study by the research on the properties of inorganic binder using the blast furnace slag and sludge seeks the polysilicon of the polysilicon sludge recycling methods. The experiment of the Series I was conducted in order to analyze the appropriate addition rate of the alkali activator. And the experiment of Series II was conducted in order to analyze the appropriate replacement ratio of the polysilicon sludge. The appropriate addition rate of the NaOH, that is the alkali activator, was exposed to be 7%. And the appropriate replacement ratio of the polysilicon sludge was exposed to be 8%.
Shrinkage Properties and Potential for Cracking of High-strength Concrete containing High-volume Blast Furnace Slag
Kim, Baek-Joong ; Park, Chung-Hoon ; Yi, Chongku ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 51~58
DOI : 10.5659/JAIK_SC.2015.31.6.51
The purpose of this study was to evaluate shrinkage properties and potential for shrinkage cracking of high-strength concrete containing high volume blast furnace slag (BFS). The W/B 0.34 and W/B 0.28 concrete specimens, with BFS replacement ratio for cement at 0%, 45% and 65%, were prepared to examine their autogenous shrinkage, unrestrained drying shrinkage and restrained drying shrinkage characteristics. The test results showed that the increase of BFS replacement ratio led to not only the increase of autogenous shrinkage and drying shrinkage at early curing age, but also increase of restrained stress in concrete. However, at BFS replacement ratio more than 45%, no significant effect of BFS was observed on autogenous shrinkage and drying shrinkage after 14 days. Furthermore, potential for shrinkage cracking of high strength concrete containing high-volume BFS was found to be the "low" according to ASTM C 1581/C 1581M-09a.
A Comparative Analysis on the Job Satisfaction of Construction Worker - Focusing on Seoul Metropolitan Area -
Shin, Won-Sang ; Son, Chang-Baek ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 59~66
DOI : 10.5659/JAIK_SC.2015.31.6.59
The purpose of this study is to analyze desire level and job satisfaction through high dimensional statistical analysis techniques to suggest basic data for the establishment of effective motivational measures for the improvement of construction image of construction workers and enhancement of work desire. Followings are the major results gained after executing this study. First, it was analyzed that the desire level of manager of general construction company were relatively in the higher desire level compared to the managers of specialized construction company and field workers. Also, managers of specialized construction company and field workers were identified as showing similar desire level in most items. Second, all the construction workers showed a normal level of satisfaction, and managers relatively showed higher satisfaction level than the field workers. Also, managers of general construction company was identified as showing higher satisfaction level than the managers of specialized construction company. Third, it was displayed that extrinsic reward satisfaction factors caused the greatest influence on the overall job satisfaction of all the construction workers.
A Study of Correlation for Diversification and Growth of Global Contractors - Focusing on International Diversification and International Revenue -
Sung, Yoo-Kyung ; Yi, June-Seong ; Choi, Seok-In ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 67~74
DOI : 10.5659/JAIK_SC.2015.31.6.67
Diversification is one of the principle strategies of company's growth. However, empirical studies for performance of diversification came up with different results. So, this study aimed to find correlation between diversification and growth for global contractors. Specifically, this study have been analyzed correlation between international diversification and revenue of global contractors in the aspect of period, company size, and core business sector. The result of the study verified that diversification of international business sectors is related to revenue growth and significantly different according to the size and the core business sector. Also, this study confirms a gradual decrease in correlation between international diversification and revenue for the past 19 years.
Effects of Very Fine Sand on Properties of Concrete Mixture and Drying Shrinkage Cracking
Park, Sang-Jun ; Lee, Eui-Bae ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 6, 2015, Pages 75~82
DOI : 10.5659/JAIK_SC.2015.31.6.75
In the middle east and the north africa, very fine sand such as dune sand (or desert sand) is used in concrete production as concrete fine aggregate. The particle size and grading of dune sand are very small and the properties of concrete could be greatly affected when very fine sand is used as concrete fine aggregate. In this study, the effects of very fine sand on the properties of concrete mixture and drying shrinkage cracking were investigated. Under condition of same amount of superplasticizer of plain mixture, to meet the target slump range, water content increased as the replacement of very fine sand increased. Compressive strength of concrete used very fine sand were 7.6~15.3% higher than that of plain concrete. Also, tensile strength were increased 24.0~28.4% when very fine sand used in concrete. Time-to-cracking were 16.8~25.7% shortened and stress rate was increased maximum 32.7% when very fine sand was used in concrete. It indicated that the risk of drying shrinkage cracking of concrete used very fine sand was higher than plain concrete. However, the higher use of very fine sand did not lead the higher risk of drying shrinkage cracking.