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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
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Journal DOI :
Architectural Institute of Korea
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Volume & Issues
Volume 30, Issue 12 - Dec 2014
Volume 30, Issue 11 - Nov 2014
Volume 30, Issue 10 - Oct 2014
Volume 30, Issue 9 - Sep 2014
Volume 30, Issue 8 - Aug 2014
Volume 30, Issue 7 - Jul 2014
Volume 30, Issue 6 - Jun 2014
Volume 30, Issue 5 - May 2014
Volume 30, Issue 4 - Apr 2014
Volume 30, Issue 3 - Mar 2014
Volume 30, Issue 2 - Feb 2014
Volume 30, Issue 1 - Jan 2014
Selecting the target year
Investigation of Optimal Location for Two-Outrigger System in High-rise Building
Kim, Hyong-Kee ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 3~10
DOI : 10.5659/JAIK_SC.2014.30.6.3
This research aimed to grasp the optimal location for two-outrigger system in high-rise building by using MIDAS-Gen. In this study, the main variables of structural analysis research were the outrigger location, the outrigger spacing and the stiffness of primary structural members such as outrigger systems, exterior columns connected in outrigger system, shear walls and frames. For the purpose of investigating the optimal position for two-outrigger system in tall building, we compared and examined the lateral displacement in top floor of 80 stories high-rise building. In the results of this analysis research, it is showed that the outrigger location, the outrigger spacing and the stiffness of primary structural members such as outrigger systems, exterior columns connected in outrigger system and shear wall had an impact on the optimal location of two-outrigger system. Furthermore, it is indicated that the study results can provide assistance in getting the structural design data for searching the optimal location of two-outrigger system in tall building.
A Study on the Missile-Target Interaction Analysis on the Concrete Dome Structure
Lee, Kyoung-Soo ; Huque, Ziaul ; Han, Sang-Eul ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 11~18
DOI : 10.5659/JAIK_SC.2014.30.6.11
In this paper, the authors performed the missile-target interaction analysis for B747 airplane against prestressed concrete dome structure. The aircraft model was developed and verified from the previous researches that were done by the authors. Therefore, the FE aircraft model can be used for the aircraft impact loading case. The development of aircraft FE model is theoretically based on the Riera function which was proposed by Riera derived from the rigid wall impact hypothesis. When the aircraft impact to the freeform or circular section shaped structure, the resulting impact force and it's integral impulse force may be different from the theoretical values. In this paper, the authors developed the artificial prestress concrete dome structure which has circular section shape and usually using for the nuclear power plant containment building structure. And the aircraft impact analyses were performed using missile-target interaction method. The commercial Hydrocode AUTODYN was used for FE modelling and simulations. From the comprehensive numerical studies, the shape of target structure significantly affects the aircraft impact load and decreases it compared to the Riera function and rigid wall impact simulation.
Evaluation of Site Measurement Method for Traditional Wooden Buildings based on the Rigid Diaphragm Assumption
Ko, Young-Nam ; Kim, Hong-Jin ; Hwang, Jae-Seung ; Hwang, Jong-Kuk ; Choi, Sun-Young ; Cho, Bong-Ho ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 19~26
DOI : 10.5659/JAIK_SC.2014.30.6.19
In order to retrofit the seismic and wind performance of the traditional wooden buildings, it is essential to evaluate the structural performance of them. However, limited researches on the evaluation of the dynamic characteristics and structural performance based on in-situ vibration measurement have been performed, and the systematic in-situ vibration measurement method is not established for traditional wooden buildings unlike the those for RC and steel buildings. In this paper, an in-situ measuring method is introduced for traditional wooden buildings based on the assumption that the rigid diaphragm action is applicable since roof and rafter restraints the rotation of columns similar to slabs in RC and steel buildings. The proposed method is applied to the dynamic characteristics identification of a small traditional wooden building and its applicability is evaluated. Finally, the method is also applied to the in-situ vibration measurement of eight traditional wooden buildings which are designated as national treasures.
A Study on the Determination of the Fire Resistant Axial Load Ratio for Reinforced Concrete Columns
Hwang, Kyu-Jae ; Yeo, In-Hwan ; An, Jae-Hong ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 27~34
DOI : 10.5659/JAIK_SC.2014.30.6.27
The purpose of this study is to determine the fire resistant axial load ratio for concrete columns as a concept of fire stress ratio which is the residual strength ratio of structural members when exposed to specific fire to the ordinary cold strength. It is necessary to set the typical cross section and boundary condition of concrete column member for reasonable evaluation of the concrete structural members. As a result of the fire resistance test for the variables corresponding to the size of section, axial force ratio and slenderness ratio based on the intact axial force with no eccentricity, it is considered that 0.5 and 0.45 axial forces are proper for less than 17 slenderness ratio and over 17 slenderness ratio respectively.
Analysis of Shrinkage Crack Propagation Considering Long-Term Behavior of Concrete
Kim, Han-Soo ; Shin, Seung-Hak ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 35~42
DOI : 10.5659/JAIK_SC.2014.30.6.35
Concrete members cause long-term behavior with time due to shrinkage. If the members are restrained, shrinkage can result in cracks. In addition, this behavior is relaxed by the creep. The modulus of elasticity and tensile strength also change with time. In this study, the extended finite element method is used to predict shrinkage cracks and the outputs were compared with the results of experiment to verify the accuracy of the analysis. This study used an experiment method suggested in the standards of KS F 2595. The propagation of the cracks were described without the remeshing by the extended finite element method and variation of material properties and stress relaxation effects of creep with time were considered to the analysis. As a result, this method can predict similar strains and timing of crack occurrence to the results of the experiment. The shrinkage crack prediction method used in this study can be applicable to the evaluation of durability and usability of concrete members.
A Study on the Resistance of Chloride Ion Infiltration and Dry Shrinkage of Mortar Containing Si/Al Hybrid inorganic salt and Multi-Cyclonic Oligomer Condensate
Kim, Woo-Jae ; Kim, Hak-Young ; Khil, Bae-Su ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 43~50
DOI : 10.5659/JAIK_SC.2014.30.6.43
Reinforced concrete structures in harbors or sea shores are typically contacted with sea waters and exposed to brine and humid environment from the start of the construction stage thus erosion in the durability of the structures are aggravated. Especially, the SOC structures suffered drying shrinkage accompanying the through cracks, facilitate the penetration of chlorine ion. In this study, the durability improving admixture(DIA) mixed with oligomer condensate and Si/Al composition was developed. The DIA countervails the drying shrinkage of concrete and mortar, fixes the chlorine ion, and prevents the erosion from the sulfate ion. In the experiments of this study, the mortar having excellent resistibility against salt damage was produced by mixing the DIA with the binder replaced the fine blast-furnace slag and cement. The whole 3 mixtures including the one mixed only with the cement (OPC) and another one replaced the blast-furnace slag (BSC), and the other one mixed with the DIA were tested. Using the 3 mixtures, the experiments to identify restraint drying shrinkage, chlorine ion penetration and the erosion from the sulfate ion were conducted. In all conducted experiments, the excellent resistibility against salt damages and drying shrinkage were identified in the order of DIA, BSC, and OPC.
Effect of Blast Furnace Slag Fineness on Rheological Properties of Fresh Mortar
Lim, Ji-Hee ; Lee, Gun-Cheol ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 51~58
DOI : 10.5659/JAIK_SC.2014.30.6.51
Partial replacement of cement with blast furnace slag has many advantages such as the reduction of construction fee, the decrease of hydration heat and the increase of long-term strength. This study investigates the effect of the fineness of slag on the rheological properties of cement paste and mortar. Slags with three different fineness were prepared, and they were used as partial replacement of cement 40% by cement weight. Test results showed that the partial replacement of BS1 and BS2 decreased flow and increased shear stress, whereas that of BS3 had an opposite effect, i.e., increased flow and decreased shear stress. Overall, in both cement paste and mortar conditions, it was found that the fineness effect of slag on the rheological properties was similar.
Effect of Surface Color of Waterproofing Membrane System Influencing Thermal Insulation Performance of Roof
Song, Jae-Seung ; Miyauchi, Hiroyuki ; Lee, Jun ; Miyauchi, Kaori ; Jeon, Seung-Shick ; Kim, Gyu-Yong ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 59~66
DOI : 10.5659/JAIK_SC.2014.30.6.59
For the purpose of improving saving energy of building from viewpoint of roofing system, we focused on the contribution of waterproofing system with thermal insulation performance, and the effect of color difference on waterproofing system were measured and evaluated by using test specimens exposed in the outdoor environment. The test specimens were 8 types with a various color of top coating. The outdoor temperature, solar radiation and the temperature between surface-inside of test specimen were measured in summer and winter season. In case of strong solar radiation, the surface temperature of waterproofing membrane increased in the dark color topcoating. In case of color effect between outside and inside of test specimen, the ratios of thermal insulation on outside-inside in the test specimen were no significant difference by color difference. On the other hand, the dark color top coating in inside-outside showed higher temperature difference more than that of light color. The surface temperature on waterproofing membrane and the surface-air temperature difference against solar radiation was calculated from brightness of color. It was concluded that the color on waterproofing membrane contribute to energy saving in the summer more than winter.
Effects of Mineral Admixtures on Chloride Binding of Offshore Concrete
Kim, No-Dong ; Park, Sang-Joon ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 67~74
DOI : 10.5659/JAIK_SC.2014.30.6.67
The use of industrial by-products is extending steadily in concrete admixtures. However, the effects of these mineral admixtures on the chloride binding in concrete have been insufficiently studied. In this study, the chloride binding effect of various mineral admixtures is evaluated and the results can be drawn as follows. The resistance to chloride penetration was greatly improved when ground granulated blast-furnace slag (GGBS) and silica fume (SF) was used in concrete. The chloride penetration resistance of concrete used fly ash (FA) was improved after 91 days. The chloride penetration depth of concrete used GGBS was lowest and concrete used SF showed second-lowest penetration depth. Concrete used FA having the effect of long-term strength development by pozzolanic reaction showed the lowest resistance to chloride penetration. In case of concrete used only ordinary portland cement, chloride migration coefficient reduced approximately 40.3% when compressive strength increased 10%. Chloride migration coefficients of concrete used FA, SF and GGBS was reduced 24.9%, 23.0% and 14.1%, respectively. Soluble chloride content was various with types and replacements of mineral admixtures in range of 41% to 77% of total chloride content. The chloride binding effect of concrete used FA was highest because concrete used FA was not denser than concrete used GGBS or SF and chloride ion penetrated inside more. However, concrete used GGBS or SF was dense and chloride ion concentrated inner surface portion of specimen. It caused lower chloride binding effect of concrete used GGBS or SF.
Strength Development of Concrete subjected to Low-Temperature Condition Controled by an In-situ Temperature Monitoring System(ITMS)
Kim, Kyoung-Min ; Lee, Gun-Cheol ; Jang, Su-Geun ; Yoon, Seung-Joe ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 75~82
DOI : 10.5659/JAIK_SC.2014.30.6.75
When determining the level of curing, time of form removal and bringing in prestress on a concrete curing site, it is recommended that strength test be performed by using test piece that has been cured in the same way as the concrete on the site. However, in actual construction sites, the curing time is mostly decided for structural concrete according to the general rules suggested by concrete standard specification, instead of testing the test piece, for reasons such as easy application and lack of proper test equipment. In some cases, the structural concrete strength is evaluated based on the test piece cured on site next to the structural concrete. In this case, it can show much lower strength than the actual structural concrete, causing a longer construction period and higher costs. Therefore, this study reviewed the strength development properties by temperature tracking curing and compared them in terms of strength development properties of conventional curing methods such as sealing curing. For testing conditions, strength development properties were examined based on water cement ratio (W/C) in low temperature and temperature tracking. As a result, in temperature tracking curing, the strength development properties were significantly different from onsite sealing curing, and lower water cement ratio (W/C) indicated larger difference between onsite sealing curing and temperature tracking method.
Modelling Influencing Factor Relationship for the Prediction of Construction Cost Indices
Yi, Kyoo-Jin ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 83~90
DOI : 10.5659/JAIK_SC.2014.30.6.83
Construction projects typically require extensive periods for the completion and there are usually considerable time gap between cost estimation and project completion. It is essential to accurately predict construction costs in order to effectively estimate costs for construction projects. In the construction industry, construction cost indices (CCI) are useful in explaining the trend of construction cost variation. CCI are recorded and announced periodically and are influence by many other related factors such as price indices and business indices. Understanding the influencing relationship will help predicting future values of CCI and incorporating such understanding and prediction into estimating will help practitioners manage construction costs. This paper adopted system dynamics modeling methods and proposes CCI prediction model by incorporating influencing factors as model variables. Comparing the simulated results by the proposed model and the real values of CCIs verifies that the proposed model provides the future CCI values with sufficient statistical significance.
Developing Simulation Model for Estimating the Productivity of Gang-Form Operation
Lee, Dong-Eun ; Shin, Won-Sang ; Son, Chang-Baek ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 91~98
DOI : 10.5659/JAIK_SC.2014.30.6.91
In this study, to resolve several problems in actual inspection stage from the sites for establishment or revision of Construction Standard Production Unit-CSPU such as difficulty of casting objects for inspection from sites, lack of inspectors, etc, we developed Production Unit Module to apply for accessorial work or unproductive work which are occurred in construction process, from Gang-Form which is widely used in formwork for outer wall and we developed Cyclone model for Gang-Form Operation which is having Gang-Form. Also, we verified the application in actual work of Production Unit Module or cyclone Model which are developed in this study by comparing and analysing outfit Production unit through Cyclone Model of Gang-Form Operation and Work Sampling method in actual sites. From the result of comparing or analysing upon outfit Production Unit from Work Sampling and Cyclone Model, we found that both have approximate value within
so we can prove the actual application of developed Cyclone Model of Gang-Form Operation.
VE Application to Small and Medium Size Private Project
Kim, Kyoung-Uk ; Oh, Jae-Hun ; Lim, Jin-Ho ; Huh, Young-Ki ;
Journal of the Architectural Institute of Korea Structure & Construction, volume 30, issue 6, 2014, Pages 99~104
DOI : 10.5659/JAIK_SC.2014.30.6.99
VE(Value Engineering) is believed to be a very powerful tool for quality improvement and schedule reduction of a project as well as for cost savings. However, little of small and medium size construction companies adopt the VE into their projects, particularly those in private sector. The main reason is that the VE is commonly misunderstood to be complex and sophisticated process, thus it is only applicable for large and difficult projects. VE applied into two small and medium scaled private projects from design phase to construction phase in order to verify advantages of the tool and find the most optimized process of it. As a result, a P university project experienced a considerable reduction on construction cost by changing a construction method of its ground works and sizes of H-beams. In addition, a H motor exhibition hall project also achieved time and cost savings. It was also revealed that, for better application of the VE on a small and medium size project, building trust between owner and contractor is prerequisite. VE skill can be taken full advantage by all the small and medium scale enterprises, which will surely lead to a huge progress of the construction business.