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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 29, Issue 12 - Dec 2013
Volume 29, Issue 11 - Nov 2013
Volume 29, Issue 10 - Oct 2013
Volume 29, Issue 9 - Sep 2013
Volume 29, Issue 8 - Aug 2013
Volume 29, Issue 7 - Jul 2013
Volume 29, Issue 6 - Jun 2013
Volume 29, Issue 5 - May 2013
Volume 29, Issue 4 - Apr 2013
Volume 29, Issue 3 - Mar 2013
Volume 29, Issue 2 - Feb 2013
Volume 29, Issue 1 - Jan 2013
Selecting the target year
Performance Evaluation of Optimized Flexure-Dominated Steel Strip Dampers under Monotonic Loading
Woo, Seung-Ki ; Lee, Chang-Hwan ; Ju, Young-Kyu ; Kim, Sang-Dae ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 3~11
Steel strip dampers have been used to reduce earthquake damage of structures by their plastic behavior. Prismatic strip is the most common shape of them but stress concentration occurs on its ends. Stress concentration results in early failure of the dampers under cyclic loading. Some modified shapes have been proposed but stress concentration rather occurs on their center when large displacement applied. In this study, new shapes were suggested in order to relieve stress concentration by improving previous shapes and performance evaluation of it was carried out under monotonic loading. Test results showed that new shapes are more efficient in energy absorption and alleviate stress concentration. In addition, they could resist very large load beyond their plastic strength.
An Experimental Study on the Limiting Width-to-Thickness Ratio of the High Strength Round CFT
Hong, Geon-Ho ; Kim, Won-Ki ; Choi, In-Rak ; Chung, Kyung-Soo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 13~20
CFT columns have many advantages such as increasing the compressive strength and ultimate strain of concrete, and aslo increasing the buckling load of steel tube. The purpose of this paper is evaluation of present design code formulas for high strength steel composite members and validity of width-to-thickness ratio limit especially in 800 MPa grade steel. Total 8 short column specimens which were made by high strength steel were tested. Main test variables were width-to-thickness ratio and concrete compressive strength. Test results were analyzed in the viewpoint of axial load capacity, load-shortening relationship, and failure mode. Test results indicated that axial load capacity in all specimens exceeded over 20% compared with the calculated value by KBC2009, and over 30% by the AISC 360-10 regardless of the width-to-thickness. And local buckling was not observed before the strain was reached the yield strain of steel in compact, non-compact and slender width-to-thickness ratio specimens by AISC 360-10 regulations. From these test results, we can concluded that the limit of width-to-thickness ratio in present design code can be modified in high strength steel composite members.
Development of Automatic Design System for Steel Connection based on S-BIM
Ko, A-Ra ; Lee, Seung-Il ; Cho, Young-Sang ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 21~28
As a way to improve productivity in construction industry, BIM(building Information Modeling) based on parametric method is being studied and applied recently. Structural BIM among BIM enable the flexible environment promptly by providing structural analysis and design, structural member modeling, generation of drawing, quantity takeoff ect in integrated environment. Current work process of steel structure applying structural BIM has been performed for main member except connection parts. However entire steel structure including the connection has a number of limitations. Integrated work process also, is utilized as limited result of steel main member generated structural analysis result and geometric data in structural analysis and design phase. Accordingly, Generation of Integrated information model including connection and integrated structural BIM process management are required through more research on generating analysis result of steel connection and connection design, detailed model etc. This study presented work process in each stage on steel connection based on structural BIM for follow-up work through auto generation of connection information model and efficient design of steel connection in design phase of steel structure, and proposed the integrated design system for executing work process. Furthermore a case study was performed by using the process in an actual project.
Seismic Tests on Reinforced Concrete Columns Confined with Continuous Hoops
Eom, Tae-Sung ; Choi, Tae-Woo ; Park, Hong-Gun ; Kang, Su-Min ; Jin, Jong-Min ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 29~37
For reduction in steel weight and duration of reinforcement work, continuous hoops can be used as the lateral reinforcement of reinforced concrete columns. In the present study, seismic tests were carried out in order to verify the earthquake resistance of the columns reinforced with continuous hoops. According to KCI 2012, the column specimens were designed with high strength SD600 and SD500 steel bars for the longitudinal and lateral reinforcements, respectively. The test results showed that the load-carrying capacity and deformation capacity of the column specimens confined with various details of continuous hoops were comparable to those of the column confined with conventional tie hoops and crossties with seismic hooks. In addition, a close investigation on the longitudinal bar buckling occurring at the plastic hinges of the columns showed that sway and/or non-sway buckling modes of longitudinal bars can be significantly influenced by the spacing and diameter of lateral reinforcement. In the present study, the lateral reinforcement spacing restraining premature longitudinal bar buckling was proposed and the proposed method was compared with the test results. Based on the proposed method, the requirements on the lateral reinforcement spacing of columns specified in KCI 2012 and ACI 318-11 were examined.
A Study on the Properties of Lightweight Aggregate Impregnated with Phase Change Material
Kim, Sang-Heon ; Jeon, Hyun-Kyu ; Hwang, In-Dong ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 39~46
In modern construction, concrete has been recognized as a very useful material, but one of the weaknesses is the low insulation performance. The application of lightweight aggregate can be a solution for improving concrete performance. In additionally, Thermal reaction of materials called PCMs.(Phase Change Materials) is very unique, and they are estimated to be very useful depending on how to use. In these background, the properties and heat storage capacities of lightweight aggregates impregnated with PCM (Phase Change Material) storage are studied from the experimental aspects in this paper. The results of this study were as follows; The condition tests of lightweight aggregates impregnated with PCM represent significant decrease of water absorption ratio, which was less than 1%, as well as 2-11% increase of density comparing to initial absolute dry conditions. Differential scanning calorimetry of the aggregated impregnated with PCM indicates 4-10 J/g of the amount of heat storage capacity. The results show that it is considered that lightweight aggregate concrete impregnated with PCM may have thermal energy storage capacity.
BIM-Based LCC Analysis Process for Exterior Skin System of Buildings
Seo, Hae-Doo ; Kim, Kyung-Rai ; Shin, Dong-Woo ; Cha, Hee-Sung ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 47~58
Estimating the Life Cycle Cost is important to the owner in terms of managing project cost and planning green buildings. A precisely performed LCC analysis will guide one to compare all alternatives and fix reasonable budgets required for each project. Despite the importance of LCC analysis, most of the local construction industries are not taking chance of this advantage. This study intends to clarify the factors which are inhibiting the efficacy of the existing LCC analysis and proposes a reformed model, BIM applied LCC analysis, as a method of improvement. In conclusion, the proposed LCC analysis process can enable the owner to readily obtain realistic geographic information surrounding the building in a highly intensive and accurate manner. Grounded on the analysis, the owner is encouraged to make the most reasonable decision. The authors expect this study to promote the use of LCC analysis among construction practitioners and contribute to more efficient construction management practice.
A Fundamental Study on Safety Management for High-rise Building Towercrane Operators - Survey and Analysis on Towercrane Operators' Current Work Condition -
Kim, Dae-Young ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 59~66
This is a fundamental study for safety management for high-rise building towercrane operators. There has been lots of studies related to the towercrane concentrating on the automation, system and equipment development and its implementation. The current studies strengthens only the limited domain of instrumental rationality and technical efficiency and the basic concepts of human resouce management seem to be strangely ignored. Thus, this study is based on the hypothesis that the construction workers, especially towercrane operators, should experience more difficulties doing their job on high-rise building job conditions than doing on general building job conditions related to the climate, physiological and psychological elements. This study focuses on the survey and analyisis of towercrane operators' current work condition to establish the frame of the further research. The study tried to find out major problems to make the further safety guidelines for the high-rise buidling towrecrane operators. This study is anticipated to provide basic data-based processing the research on safety management for high-rise building construction workers.
Measuring Default Risk of Construction Company Using KMV-model
Choi, In-Sik ; Yoo, Seung-Kyu ; Kim, Jae-Jun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 67~74
The purpose of this research is to confirm a level of the default risk of construction companies and its changing process by utilizing the KMV model developed on the basis of the Black & Scholes option pricing theory. This research has set construction companies listed to KOSPI/KOSDAQ for applying the KMV model and measuring the level of the default risk of construction companies(14 indolvent companies and 14 non-insolvent companies). As an analysis result, it could be confirmed that the EDF of inslovent companies is higher than the EDF of non-insolvent companies and that insolvent companies relatively show a more serious level of default risk than non-insolvent companies in the analysis period. As a result of this research, it was analyzed that if the EDF of the KMV model is measured, it does not only discern existence of bankruptcy, but also can effectively examine the level and fluctuation process of the default risk of construction companies. It is judged that this can provide meaningful decision-making indicators to investors or managers of companies in the risk management viewpoint.
Identifying System Architecture of Construction Quality Management System Integrated with Schedule and Operation Models
Lee, Dong-Eun ; Park, Sang-Min ; Son, Chang-Baek ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 75~84
This paper presents a system architecture and database of construction quality management system which encourages real time information tracking and monitoring. It improves the real time quality record tracking by using QR code technology in the project delivery. The advantages and issues relative to QR code and the database structures of the tracking system are presented. Conventional project scheduling system, operation modeling and analysis system, and quality management system are hybridized using QR code technology. The system improves project quality management by tracking the atomic tasks which consists of a construction process at the lowest level of construction hierarchy. It analyzes the quality records to determine the causes of abnormality and/or nonconformity. Using QR code technology, the construction quality management system may be more effective than the conventional one. It was confirmed that the quality management processes in construction project delivery can be more visible and controllable by integrating QR code technology, project scheduling system, and quality management system.
Decision Making for the Optimal Pusher-loaded Scrapers Fleet
Son, Chang-Baek ; Lee, Hyung-Guk ; Lee, Dong-Eun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 29, issue 2, 2013, Pages 85~94
Pusher-loaded scrapers are important construction equipment in large earthmoving operations. Productivity of a pusher-loaded scraper varies greatly with the temperature or elevation, equipment performance, haul speed, haul-road conditions, method of loading, and number of scrapers per one pusher. Determining of the most economical scrapers fleet demands time-consuming calculation regarding the size of equipment, model name, and number of scrapers because it requires references of numerous performance charts or tables and repetitive use of complicated calculation. Moreover, operating conditions, which contain changeable parameters depending on the time, exaggerate this time-consuming problem. In addition, the calculation consumes a huge amount of time because operation conditions contain parameters which are changeable overtime. This research suggests the optimum economical pusher-loaded scraper fleet(OPSF) system which facilitates calculation process and deals with parameters effectively to complete on operation in decision making stage. The prototype of this program is developed using MATLAB. This provides the graphic user Interface where attribute values related to an operation are specified. When the parameters of an operation are specified by users, the system computes the productivity of each equipment, compares completion times of the operation, and recommends the most economical equipment fleet.