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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Institute of Building Construction
Journal Basic Information
Journal DOI :
The Korean Institute of Building Construction
Editor in Chief :
Volume & Issues
Volume 13, Issue 6 - Dec 2013
Volume 13, Issue 5 - Oct 2013
Volume 13, Issue 4 - Aug 2013
Volume 13, Issue 3 - Jun 2013
Volume 13, Issue 2 - Apr 2013
Volume 13, Issue 1 - Feb 2013
Selecting the target year
CNC Twisted Tube Method for 3D Coordinate Control Technology for Freeform Structure -Focused on The ARC in DaeGu-
Ryu, Han-Guk ; Kim, Sung-Jin ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 434~440
DOI : 10.5345/JKIBC.2013.13.5.434
Generally, the envelope of a freeform building is composed of a structure made with rectangular or C-shaped steel pipe, and steel or aluminum panel finishes on the structure. However, these construction methods increase material loss and cost and time. There are also numerous cases of misunderstanding of design and difficulties in construction, which frequently cause construction errors. Such construction errors decrease construction productivity, resulting in poor construction quality and the need for rework, as well as cost and time overruns. To solve the problem, this study proposes a 3D coordinate control technology for freeform structure implemented through a CNC(Computerized Numerical Control) Twisted tube method, and by extension, develops a BIM-based envelope construction method for freeform building.
Analyzing the Working Conditions for Female Field Managers Employed by General Contractors
Son, Chang-Baek ; Shin, Won-Sang ; Lee, Dong-Eun ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 441~448
DOI : 10.5345/JKIBC.2013.13.5.441
In recent years, the number of female workers pursuing careers in the construction engineering and management field has increased, despite the fact that the job positions have been traditionally considered as retaining job functions and/or qualities that are more appropriate to male than female. This may be attributed to the fact that the positions also require delicate and/or detail-oriented job functions, which can be successfully performed by female. It is important for project participants to understand the working conditions for female field managers by analyzing their job performance. This study collects expert opinions regarding female`s managerial performance on job site. Survey questionnaires were administered to two focus groups, male and female field managers who work for general contractors. This study contributes to encouraging female`s social and economic involvement by investigating the challenges they face in the workplace, and provides measures to respond to such challenges.
Quality Evaluation of Basalt Aggregates from JEJU Island
Jang, Myung-Houn ; Choi, Hee-Bok ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 449~456
DOI : 10.5345/JKIBC.2013.13.5.449
This study was carried out to assess the suitability in terms of the standards of material quality of basalt aggregates from JEJU Island as a source for concrete aggregate. Quality assessments on the basalt aggregates were performed to assess the soundness of coarse aggregates using sodium sulfate solution, aggregate crushing test, and Los Angeles abrasion test. In addition, XRD, XRF, porosity, and compressive and tensile strength tests were performed to analyze the chemical components and the mechanical properties. In general, the mechanical properties of basalt aggregates from some areas did not meet the Korea Standards (KS), but the levels of compressive and tensile strength were higher than those of granite, andesite, and sandstone of other regions.
Cause of Surface voids in Concrete Attached to an Aluminum Form, and Measures for Prevention
Noh, Sang-Kyun ; Lee, Seung-Hoon ; Han, Cheon-Goo ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 457~464
DOI : 10.5345/JKIBC.2013.13.5.457
Traditionally, the material used for the form in reinforced concrete construction has been wood or steel. But recently, aluminum forms have been widely used in wall structures such as apartment buildings. Aluminum is light, easy to handle, and economically advantageous, but the hydrogen gas created due to its reaction with the alkali component in concrete gives rise to air pockets on the concrete`s surface, and deteriorates the surface`s finishability. In this research, to determine the influence of aluminum material on concrete, the cement paste W/C and its chemical reactivity in alkali and acid solution were analyzed. As a prevention plan, the influence of the number of applications of calcium hydroxide and various surface coating materials was analyzed. Through the analysis, it was found that the surface voids on the aluminum form are the result of the reaction of hydrogen gas with an alkali such as
. This can be prevented by the surface treatment of
, separating material and coating material. However, poor surface form and damages to the form are expected to cause quality degradation because of the aluminum-concrete interaction. Therefore, thorough surface treatment, rather than the type of separating material or coating material, is considered the most important target of management.
Evaluation of Protective Performance of Fiber Reinforced Concrete T-Wall
Lee, In-Cheol ; Kim, Hong-Seop ; Nam, Jeong-Soo ; Kim, Suk-Bong ; Kim, Gyu-Yong ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 465~473
DOI : 10.5345/JKIBC.2013.13.5.465
Concrete is an outstanding material in terms of its impact and blast resistance performance. However, there a limitation of concrete is its risk of collapse due to the brittle failure and spalling. Increasing the thickness of members was used as a method to enhance the protective performance of concrete, despite the resulting inefficient space. To solve this problem, different types of fiber reinforced concrete were developed. Recently, another type of fiber reinforced concrete is also being developed and applied as a material that offers protection against impacts and blasts by increasing the flexural toughness of concrete. In this study, the test was conducted to evaluate the impact resistance performance of fiber reinforced concrete and mortar according to impact of high-velocity projectile. A concrete T-wall was also tested to evaluate its protective performance from fragment by 155mm-thick artillery shell. The test results revealed that improving flexural strength through fiber reinforcement inhibited cracks and spalling of rear, and spalling of front by high-velocity impact. As such, it is expected to improve the protective performance of the T-wall and reduce the thickness of the member.
Correlation Analysis between Job Stress and Job Satisfaction of Building Construction Field Managers
An, Sung-Hoon ; Zhang, Zhen ; Lee, Ung-Kyun ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 474~481
DOI : 10.5345/JKIBC.2013.13.5.474
The success of a construction project hinges on the effective and efficient management of human resources. The stress of human resources is directly related with work performance, and as such, should be managed to improve work performance. This study examined the correlation between job stress and job satisfaction among building construction project managers. A questionnaire to measure work performance was created by referring to the Korean Occupational Stress Questionnaire Short Form developed by the Korean Occupational Safety & Health Agency, as well as a previous study. The mean job satisfaction score of field managers was 3.6, which suggests that they are generally satisfied in their current job environment. A Pearson`s correlation analysis showed that the field managers that were satisfied with their job had less job stress. These results could be used for the effective management of construction site managers and to improve their job performance in the field.
Development and Application of Lattice Shear Reinforcement for Flat Plate Slab-column Connection
Kang, Su-Min ; Park, Sung-Woo ; Bang, Joong-Seok ; Lee, Do-Bum ; Kwon, Chul-Hwan ; Park, Hong-Gun ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 482~490
DOI : 10.5345/JKIBC.2013.13.5.482
Although the flat plate system is an efficient structural type due to the simplicity of its construction, the low story height, and the various plan design, the slab-column connections are vulnerable to punching shear failure from gravity load and eccentric shear failure from lateral load. To prevent the structure collapse, various construction methods of slab-column connection reinforcement are developed but none of these satisfies all of structural performance, economics, and constructability. This paper presents the reinforcement of slab-column connection with lattice bars. The structural performance is confirmed with the interior slab-column connection tests subjected to cyclic loading, and the economic feasibility is demonstrated from the structural design under the same condition with lattice bars, stud rails, and stirrups.
Mix Design of Lightweight Aggregate Concrete and Determination of Targeted Dry Density of Concrete
Yang, Keun-Hyeok ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 491~497
DOI : 10.5345/JKIBC.2013.13.5.491
The objective of the present study is to establish a straightforward mixture proportioning procedure for structural lightweight aggregate concrete (LWAC), and evaluate the selection range of the targeted dry density of concrete against the designed concrete compressive strength. In developing this procedure, mathematical models were formulated based on a nonlinear regression analysis over 347 data sets and two boundary conditions of the absolute volume and dry density of concrete. The proposed procedure demonstrated the appropriate water-to-cement ratio and dry density of concrete to achieve the designed strength decrease with the increase in volumetric ratio of coarse aggregates. This trend was more significant in all-LWAC than in sand-LWAC. Overall, the selection range of the dry density of LWAC exists within a certain range according to the designed strength, which can be obtained using the proposed procedure.
Analysis of Consulting Reports on Defect Disputes in Apartment Building
Seo, Deok-Seok ; Park, Jun-Mo ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 498~505
DOI : 10.5345/JKIBC.2013.13.5.498
The main processes involved in a defect dispute are consulting, reviewing, and finally judging as an arbiter. This process of defect consulting produces a defect consulting report, but business practices and standards of judgment will differ among consultants, and have many problems. This study reviews the structure of a defect consulting report and considers the structure`s problem, which is that it is not standardized. To achieve this, data of sixteen defect consulting report were collected involving defect lawsuit cases before or after 2010. The structure and index of the defect consulting reports were then reviewed, and the results are as follows. As for a structure based on fourteen index, there are suitable that judge a outline, a cost estimate data and a consulting work item by a consulting standard. Furthermore, analysis by each common parts and private parts is considered as appropriate about consulting items and estimate by standard. However, consulting item in construction progress and responsibility period for security that related on a cause and a responsibility of defect need to complement. Meanwhile, the first thing of issues are connected a defect consulting is urgent a standardization for a defect type.
A Quantity Prediction Model for Reinforced Concrete and Bricks in Education Facilities Using Regression Analysis
Lee, Jong-Kyun ; Kim, Boo-Young ; Kim, Jang-Young ; Kim, Tae-Hui ; Son, Kiyoung ;
Journal of the Korea Institute of Building Construction, volume 13, issue 5, 2013, Pages 506~512
DOI : 10.5345/JKIBC.2013.13.5.506
Since the amendment of the law on the private sector investment in social infrastructure in January of 2005, the government has been actively promoting Build-Transfer-Lease (BTL) projects. Notably, most new educational facilities have been built as BTL projects. For these facilities, the unit cost per unit area has been applied to predict construction costs. However, since construction costs are mostly managed after the detailed design phase, the costs can be estimated incorrectly. For this reason, cost management is needed in the planning phase, with a sound approximate estimate to prevent the wasteful use of funds. To address this shortcoming, this study aims to develop a quantity prediction model for education facilities using regression analysis in the planning phase. The developed model is focused on the required quantities of reinforced concrete and bricks. In order to achieve the objective, the data of 44 educational facility projects collected from Gyeonggi-do was used in the regression model. This study can be utilized by major stakeholders to accurately predict construction costs by estimating the appropriate quantities of reinforced concrete and bricks in the planning design phase.