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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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 32, Issue 8 - Aug 2016
Volume 32, Issue 7 - Jul 2016
Volume 32, Issue 6 - Jun 2016
Volume 32, Issue 5 - May 2016
Volume 32, Issue 4 - Apr 2016
Volume 32, Issue 3 - Mar 2016
Volume 32, Issue 2 - Feb 2016
Volume 32, Issue 1 - Jan 2016
Selecting the target year
Effects of Delayed Construction of Outrigger Joints on Lateral-Load-Resisting Capabilities of RC High-Rise Buildings under Construction
Kim, Jae-Yo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 3~13
DOI : 10.5659/JAIK_SC.2016.32.1.3
In many RC high-rise buildings, a shear wall and outrigger system is used as a lateral-load resisting system. In a shear wall and outrigger system, to minimize the additional forces in outriggers by differential shortening of adjacent vertical members, a delayed-joint construction method of outriggers is frequently applied. But, in construction stages with unconnected joints of outriggers, a design-intended lateral road resisting system is incomplete and structural performances for lateral loads may be weakened. In this study, to analyze effects of delayed-joint outrigger construction on structural performances of RC high-rise building under construction, a tower-typed residential complex building with 60 floors is selected as a sample model, and numerical analyses are performed. At several construction stages, appropriate construction load conditions and numerical analysis assumptions are applied, and numerical results present comparisons of structural performances including fundamental shapes and periods, lateral behaviors, and member design strength ratios. Also, this study can be used as guidelines of design loads and structural analysis schemes for checking the safety of RC high-rise buildings under construction.
Monotonic Load Test of Post-Installed Anchors subjected to Load Combinations with Different Loading Angles
Kim, Ho-Seon ; Park, Ji-Hun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 15~22
DOI : 10.5659/JAIK_SC.2016.32.1.15
The performance of post-installed anchors subjected to combined tension and shear loads is investigated experimentally in terms of strength and displacement. Monotonic loading tests subjected to different loading angles between 0 and 90 degrees are performed for specimens with hexagonal section. Experimental strengths are compared with calculated strengths based on design codes and interaction curves. Anchor displacements at different load levels are investigated to examine current design code or guideline. In addition, an interpolation method is proposed to estimate anchor displacements under combined action using those under single-component action. The proposed method interpolates experimental anchor displacements at design strength levels appropriately, and thus can be used to evaluate the rigidity of post-installed anchor connections.
Hysteresis Characteristics of Buckling Restrained Brace with Steel Double-Restraining Elements of Built-up Type
Shin, Seung-Hoon ; Oh, Sang-Hoon ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 23~34
DOI : 10.5659/JAIK_SC.2016.32.1.23
The conventional braced system is generally accepted as the lateral load resisting system for steel structures due to efficient story drift control and economic feasibility. But lateral stiffness of the structure decreases when buckling happens to the brace in compression, so that it results in unstable structure with unstable hysteresis behavior through strength deterioration. Buckling restrained brace(BRB) system, in which steel core is confined by mortar/concrete-filled tube, represents stable behavior in the post-yield range because the core's buckling is restrained. So, seismic performance of BRB is much better than that of conventional braced system in point of energy absorption capacity, and it is applied the most in high seismicity regions as damper element. In this study, we examined a few of weaknesses of general-shaped BRB and improved them, so that suggested new shape of BRB. It is made up of two steel restraining elements with non-filled material and the steel core. The new shapes of BRB were tested according to AISC(2010) and evaluated seismic performances and hysteresis characteristics.
Experimental Study for Investigating Seismic Performances of RC Columns with Non-Seismic Details
Kim, Dong-Hoon ; Kim, Jong-Chan ; Choi, Kyoung-Kyu ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 35~44
DOI : 10.5659/JAIK_SC.2016.32.1.35
In the present study, experimental studies were performed on six reinforced concrete columns with non-seismic details under cyclic lateral loading. The major test parameters are axial load ratio, hook angle, longitudinal reinforcement ratio, and shear span to depth ratio. The structural performances and characteristics of the specimens were discussed in terms of hysteretic load-displacement relationship, maximum shear strength, drift capacity, damping ratio, and energy dissipation. In the test results, it was observed that axial load ratio significantly affected the maximum shear strength and drift capacity, while longitudinal reinforcement ratio and shear span to depth ratio affected the maximum shear strength only. Most of specimens were finally failed in flexure-shear mode caused by micro diagonal cracks at plastic hinge zone after yield of longitudinal tension reinforcement. When comparing the test results with the prediction of ASCE 41-06, it was found that ASCE 41-06 underestimated a plastic deformation of reinforced concrete columns with non-seismic details.
Correlation between Nano-indentation Analysis on Surface Hardness and KS Tensile Strength after Deterioration of Exposed Type Waterproofing Material for Improvement of Evaluation Method
Kim, Meong-Ji ; Oh, Sang-Keun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 45~54
DOI : 10.5659/JAIK_SC.2016.32.1.45
This study analyzes two different physical performance evaluation methods of exposed urethane film type waterproofing material after chemically induced deterioration. For the purpose of enhancing the conventional performance evaluation methods of chemical resistance properties of exposed urethane waterproofing film after chemically induced deterioration processing, this study proposes a tentative study to compare the tensile strength value of the materials and the material hardness value obtained from the nano-indentation analysis method to find a relativity between the two sets of data for a more accurate determination of the chemical resistance performance of the materials. A combined data format composed of surface property analysis and tensile strength performance and hardness value of exposed urethane waterproofing film materials obtained through various physical property testing methods will be used to produce a single relative equation for the purposed of improving the future studies on durability and performance testing methods on exposed urethane waterproofing film materials.
Concrete Temperature History and Micropore by using Insulation Gang-Form in -20℃ Cold Weather Conditions
Nam, Kyung-Yong ; Ha, Jung-Soo ; Lee, Dong-Ha ; Park, Tae-Won ; Won, Joon-Yuen ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 55~62
DOI : 10.5659/JAIK_SC.2016.32.1.55
This paper is about a test performed to concrete form work in
cold weather conditions on climate change by global warming Furthermore, this paper examines limitations in application insulation gang form and analysis temperature history, strength development and characteristic of micropore of concrete placed in abnormal winter weather. According to the test result, concrete temperature dropped below
in the case of general gang form 12 hours after concrete placement. However, we could find excellent insulating effect rather than general gang form in the case of insulation gang form because temperature of outer surface and core of concrete has not dropped below
and highest temperatures was recorded
within 12 hours despite drastic ambient temperature conditions after concrete placing. In comparison of temperature record of surface portion of insulation gang form and that with or without wales by temperature record of insulation weak point, with wales is not as good as that on surface portion of insulation gang form. The reason for this is thought to be the decline in hydration reaction of concrete due to the decreases of ambient temperature and lack of insulation effect by wale protection made of pvc. As concrete got aged, the number of micropores less than
has increased and it of the large voids has decreased. Also, more small pore were observed in concrete placed with insulation gang form than with general gang form.
Application Prototype Development for the Building Safety Periodic Inspection
Ko, Kyujin ; Oh, Sanghoon ; Lee, Chansik ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 63~71
DOI : 10.5659/JAIK_SC.2016.32.1.63
With the demands for the development of smart technologies rapidly rising around the world, diverse technologies are being developed. Diverse efforts are continuing to link information technologies to the building safety periodic inspection, but their practicality is low, leading such efforts to be finished at the level of research. To develop the prototype of building inspection applications, this study interviewed working staff members to identify and analyze problems involved, and based on this, derived key required functions, including automation of appearance investigation and support for drafting reports. The application was applied to actual cases to test it. The result of the test showed that the work time for conducting onsite investigation and writing reports was shortened by 20%.
Optimal Tractor-Blade Configuration Planning System for Eco-Economic Dozing
Park, Young-Jun ; Kim, Byung-Soo ; Lee, Dong-Eun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 73~81
DOI : 10.5659/JAIK_SC.2016.32.1.73
Identifying the optimal configuration of tractor (i.e., engine type and size) and blade must be preceded for eco-economic dozing operation. Existing experience based configuration practice is lack of scientific rational. It demands to deal with many variables (e.g., job site's geological and topological attributes, temperature and atmospheric pressure, coefficient of traction, tractor and blade motion data, soil and rock properties, blade's engineering dimension, job and management conditions etc.) simultaneously and timely. A database structure for processing the optimal eco-economic dozer configuration is designed and implemented to replace existing experience based practices. On top of the database, a new method that identifies an optimal set of tractor engine(i.e., type and size) and blade is implemented for a standalone dozer operation. The method is coded into MATLAB to facilitate using the method in practice. A case study demonstrates and verifies the system.
Decision Making Model for Apartment Project and Its Factor Analysis using AHP and Logistic Regression Analysis
Kim, Ki-Shin ; Kim, Su-Yong ; Kim, Dae young ; Huh, Youngki ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 32, issue 1, 2016, Pages 83~90
DOI : 10.5659/JAIK_SC.2016.32.1.83
Large portion of apartment projects are initiated and conducted by developers together with contractors in Republic of Korea. Contractors therefore surely need to have great knowledge about feasibility analysis in order to make right decision on whether or not participate in a project proposed by a developer. However, few contractors have such skill and insight in reality and make the judgement mainly based on experience and intuition of their top management. A decision making model was developed that can be used easily and practically by contractors. Furthermore 109 real project cases were applied into the model and found that the model could help to make right decision with reliability of as high as 85.3 percent. Using scatter plots and logistic regression analysis, a few drivers affecting the decision were also found, namely, 'project site', 'basic plan', 'economic feasibility', 'salability'. The results will be a great interest for anyone who wants to make right decision with relatively small efforts.