Go to the main menu
Skip to content
Go to bottom
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
Editor in Chief :
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
Optimized TNT Equivalent Analysis Method for Medium and Small Scale Mixture Gas Explosion on Structural Elements
Choi, Hyung-Bin ; Kim, Han-Soo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 3~10
DOI : 10.5659/JAIK_SC.2015.31.11.3
In this paper, the analysis of TNT equivalent method for practical mixture gas explosion was performed to simplify the gas explosion analysis. Autodyn which was specialized for analysis of explosion and impact was used to simulate the behavior of structural element. By using linear elastic material properties, we can see general displacement behavior aspect and consider various natural periods of structural element. After comparing model of mixture gas property with TNT equivalent model in terms of the maximum displacement of structural elements, we proposed optimized TNT equivalent analysis method for practical mixture gas explosion by using proper explosion efficiency. The mixture gas properties was obtained from C.E.A program which can calculate chemical equilibrium product concentration from any set of reactants and determines thermodynamic and transport properties for the product mixture.
Evaluation of Loss Factor and Deflection of Floor Damping Materials Considering Loading Periods and Environmental Conditions
Kim, Jung-Min ; Kim, Jin-Koo ; Lee, Jung-Yoon ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 11~19
DOI : 10.5659/JAIK_SC.2015.31.11.11
Installing damping layer in the floating floor system is a good way to reduce noises transferred from the houses above so that a number of researchers have studied on the damping materials. This research effort focused especially on the loss factor and deflection of floor sound reduction materials. The experimental program was divided into three sections: the loss factor, deflection of damping materials included in the floating floor system, and the deflection of damping materials submerged completely. Three main parameters were considered in the experimental investigation: the weight of load, the eight types of damping materials and loading periods. Specifically, this experimental test was intended to evaluate the loss factor of damping materials changed subjected to long-term load and also the effect when casting lightweight concrete and finishing mortar and submerged completely throughout the comparative evaluation of deflection of damping materials. The results indicated the loss factor of damping materials was changed time depending subjected to load in the several specimens and flowing the mortar in the damping materials affected their deflections but the submergence of specimens wasn't related to the deflection. Finally, this research results would be valuable references for predicting the noises causing from the upstairs or nearby in the apartment houses.
Structural Check Schemes for the Initial Design of Columns of Hanok for Vertical Loads
Kim, Yeong-Min ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 21~28
DOI : 10.5659/JAIK_SC.2015.31.11.21
In this study the section tables for the column members of Hanok were developed, which can be used in the early design stage of Hanok. The key items in developing section tables are column types, wood species and their material properties, connection types between column and horizontal members, roof loads, and member length and their topological disposition. The columns of Hanok are classified as four types, such as, exterior corner column, edge column, interior corner column and interior column. I proposed approximate calculation method for computing tributary loading area for each column types using representative span. The field applicability of the developed column section tables were evaluated using two test-bed Hanoks. The column sections by three methods, that is, detailed structural check, section tables and field adopted section were compared. It turned out that the sections from the section tables are somewhat conservative and has its limit that it did not considered lateral loads, but showed appropriate field applicability in initial design stage of Hanok.
An Experimental Study on the Ultimate Strength of Aluminum Alloy Single Shear Bolted Angle Connections
Kim, Tae-Soo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 29~36
DOI : 10.5659/JAIK_SC.2015.31.11.29
Angle-section members are widely used as tension members bolted with the main structures of building. Current design specifications for tensile net-section fracture capacity present strength reduction factor to account for the strength reduction effects by shear-lag and bending moment induced from load eccentricity. In this paper, reduction factors used in bolted angle connections were investigated and net-section efficiency were compared according to the change of plate thickness, end distance and bolt arrangement. Most of specimens failed by tensile net-section fracture accompanied by curling (out-of-plane deformation) at outstanding leg exception to some specimens with short end distance and
(single) bolt arrangement. Curling changed the fracture mode and reduced the strength in bolted angle connection. Curling deformation got larger with the increase of end distance in the parallel to loading direction and. Also, net-section efficiency has tended to get higher according to the increase of bolt number and plate thickness. Test strengths were compared with those by strength equations of current design codes and existing study results.
Dynamic Characteristics of Traditional Wooden Structure(Daeungjeon of Bongjeongsa) Excited by Historical Earthquake using Shaking Table
Hwang, Jae-Seung ; Hwang, Jong-Kook ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 37~46
DOI : 10.5659/JAIK_SC.2015.31.11.37
The objective of this paper is to investigate the response characteristics of Korean traditional wooden structure subject to dynamic earthquake load. To accomplish this research purpose, as a typical example of Korean traditional wooden structures, Bongjeong-sa(temple) constructed in the fifteenth century and classified as a treasure is selected. One-third scale model of Bongjeong-sa is designed and set up on a sliding table of 5.5m by 4.5m to perform shaking table test in the laboratory. To find similarity condition on the natural frequency between real structure and scaled test model, free vibration test was performed for real structure and test model. The natural frequencies of real structure were calculated from acceleration responses measured from ambient vibration test. The test model on shaking table was moved instantaneously toward x-direction of test model structure from 1mm to 10mm for the free vibration test while varying the roof mass in order to adjust similarity condition on the natural frequency. The earthquake signal of Elcentro, Kobe and Hachinohe were used to perform seismic test. The magnitude of earthquake acceleration was controlled as 4 types of 0.07g, 0.11g, 0.167g and 0.22g. The characteristic of instantaneous natural frequency and damping ratio with respect to the magnitude of displacement, velocity and acceleration responses of roof were analyzed.
Standardization of Test Conditions of Testing Methods for the Lateral Load Resistance and Impact Resistance of the Non-bearing Lightweight Walls
Choi, Soo-Kyung ; Kim, Sang-heon ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 47~54
DOI : 10.5659/JAIK_SC.2015.31.11.47
As the structural type of apartment houses has been changing from wall column structures to Rahmen structures, demand for lightweight walls has been increasing. Although lightweight walls reduce self-weight of the building and enable efficient use of interior spaces, to apply them as building walls, the structural safety of them should be secured without fail. The lateral load resistance test method and impact resistance test method for the verification of lightweight walls' structural safety have not yet been established. The purpose of this study is to standardize lateral load resistance test method, impact resistance test method using large soft body, and impact resistance test method using small hard body. Most of the configuration of the test methods and testing device were made by modifying the content of BS 5234:1992. However, the conditions of loads applied to specimens were reestablished reflecting the characteristics of loads acting on actual walls. In the lateral load resistance test, load conditions were divided into three levels; 500N, 1000N, and 3000N so that the conditions could be selected and applied according to the uses of walls. In the impact resistance test using large soft body, the length of the rope was set to be at least 2.5m and the drop heights were divided into three levels; 200mm, 400mm, and 600mm. In the impact resistance test using small hard body, the drop heights were divided into three levels; 0.1m, 0.2m, and 0.5m. The performance test methods standardized in this study will be objective evaluation tools when optimum lightweight walls are designed or selected in construction sites. In addition, they will be usefully utilized when setting performance goals for development of new lightweight walls.
Preventing Carbonation of High-volume SCM Concrete by Painting Emulsified Refined Cooking Oil
Choi, Young-Doo ; Han, Cheon-Goo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 55~62
DOI : 10.5659/JAIK_SC.2015.31.11.55
The aim of this research is to suggest the carbonation preventing method of concrete by using surface painting substances. As the tested concrete cases, Plain mixture of 100 % of OPC, FA30, and BS60, for the concrete mixtures incorporating 30 % of fly ash, and 60 % of blast furnace slag, respectively. As the control factors, application on the concrete surface, and two-different types of painting substances were used: emulsion pain (EP), and refined cooking oil (RCO). As the test results, FA30 showed the fastest carbonation was shown while Plain mixture showed the slowest carbonation. The carbonation depth was increased with age for regardless the mixtures, but RCO showed the most outstanding performance of carbonation prevention. Namely, for 28 weeks of age, applying RCO showed approximately 46, 28, and 34 % of carbonation preventing performance for Plain mixture, FA30, and BS60, respectively, while applying EP showed approximately 13 % in average for all concrete mixtures. Therefore, it is considered that RCO has a favorable performance of preventing carbonation of concrete.
The Fluidity and Hardened Properties of Eco-Friendly Low Cement Concrete with 3 Types of Binders
Choi, Se-Jin ; Jeon, Yong-Su ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 63~70
DOI : 10.5659/JAIK_SC.2015.31.11.63
Recently, many researchers of the construction materials field are concerned about eco-friendly concrete in the construction industry due to the greenhouse gas reduction problem and international issue. In this paper, we investigates the effect of the kinds and replacement ratio of cementitous materials including fly ash and granulated blast furnace slag powder on the fluidity, setting time, temperature rise, compressive strength and drying shrinkage of eco-friendly low cement concrete with 3 types of binders. Fly ash and granulated blast furnace slag powder were used to replace Portland cement at replacement ratios of 70, 80, and 90% by binder mass. Test results demonstrate that the fluidity, compressive strength and salt damage resistance of the eco-friendly low cement concrete mixes were better than that of the control mix. In addition, the peak temperature of the eco-friendly low cement concrete was 4.0 to
lower than that of the control mix. In this investigation, 10% cementitous materials replacement caused a reduction in the peak temperature of about 0.3 to
in the concrete mixes. The setting time of F10S80 concrete mix (cementitous materials replacement ratio 90%; fly ash 10% and granulated blast furnace slag 80%) was similar to that of the control mix.
Physical Properties of HPFRCC Using Fiber Combinations According to Change of W/B and Fiber Replacement Ratio
Lee, Jong-Tae ; Han, Cheon-Goo ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 71~78
DOI : 10.5659/JAIK_SC.2015.31.11.71
In the construction industry concrete materials has that exhibits the advantage of a high compressive strength at an affordable price, beside it has that present a disadvantage of brittle fracture such as not withstand the low impact on the tensile strength. Recently there is the impact safety concerns of building by terrorism and explosions are treated heavily. The way to correspond the high-performance fiber-reinforced cementitious composites(HPFRCC) has been emerging as an important measure. However the existing research of HPFRCC was about a single type of fiber as it has an advantage such as convenience in placing depend using one kind of fiber, but it also has a disadvantage of fluidity, sensitivity and toughness etc. in quality rather than using 2or more composite fiber mixture. In this study, HPFRCC consist of 3 species of the SL+SS+OL fibers combination to research analysis of various engineering characteristics in variable terms of fluidity, tensile strength etc. of W/B and fiber replacement ratio to suggest the best mixing ratio which can be used in partical. As a result in the case of a 3 species fiber combination of SL+SS+OL reviewed engineering characteristics of workability, compressive strength and tensile performance etc. the best result was when W/B is 25% with 2.0%of fiber combination replacement ratio.
Developing IoT-based Construction Progress Measurement Prototype
Lee, Hyung-Guk ; Lee, Hong-Cheol ; Lee, Dong-Eun ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 31, issue 11, 2015, Pages 79~89
DOI : 10.5659/JAIK_SC.2015.31.11.79
Conventional progress control technique which collects and manages construction progress data manually is involved in inaccurate and omitted information in construction phase. It is time consuming and labor intensive to acquire the construction operation data in detail. It is important to develop the system that analyzes the project performance accurately and control the progress efficiently by keeping track of the progress data at a lower level than the operation. This paper proposes a system prototype which measures project progress at the construction operation level by hybridizing remote-controlled robots (i.e., air-drone and wheel mounted vehicle), smart sensors, and project scheduling and controlling tool. The system is developed into an Internet of Thing(IoT)-based progress measurement system. using robot and information technology. Earned value method-based physical progress measurement method is utilized to compute the quantity of work completed. A test case was performed to confirm that the new system complements the limitation of existing progress control method.