• Title/Summary/Keyword: New Construction

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A Study on User Experience Survey for Development of New Full Body Harness in Heavy and Construction Industry (중공업과 건설업에서 새로운 전신 안전대 개발을 위한 사용실태에 대한 연구)

  • Kim, Daesik;Kim, Yuchang
    • Journal of the Korean Society of Safety
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    • v.31 no.6
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    • pp.67-73
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    • 2016
  • According to industrial accident analysis of the Ministry of Employment and Labor in 2013, 38 workers were injured by fall accidents on average per day, and one worker died on average per day among them. In various industries such as heavy and construction industry, the full body harness is commonly used to prevent the fall accident. In developing full body harness, the designer considered only the workers' safety, without taking into account comfort and workability. The survey was conducted so as to search the problems of full body harness currently used by workers in heavy and construction industry. The survey questionnaire was given to 565 workers wearing full body harness in heavy and construction industry. The results of study showed that the development of new full body harness considering body size of korean was needed. The impotent factors for developing of new full body harness were the size and the weight of the full body harness. The full body harness taking into account body size was judged to contribute to more comfortable work, work efficiency and safety. The result of this study can be utilized as useful data in the development of new full body harness considering the body size of korean workers.

Construction Method of Binary Low Correlation Zone Sequence Set Using Gray Mapping (Gray 사상을 이용한 이진 낮은 상관구역 수열군의 생성법)

  • Jang, Ji-Woong;Kim, Young-Sik;Lim, Dae-Woon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.2C
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    • pp.169-174
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    • 2009
  • In this paper, we propose a new construction method of binary low correlation zone (LCZ) sequence set. New construction method applies Gray mapping to conventional quaternary LCZ sequence set that has specific property. The period of new binary sequence set is twice as that of used sequence set in construction, and maximum magnitude of correlation value within the LCZ and cardinality of new set is also twice as those of used quaternary sequence set. But the LCZ size is the same with that of used sequence set. If the used Quaternary sequence set is optimal, the constructed binary sequence set is optimal with high probability.

A study on the Construction Detail of Waterproofing in Underground of Apartments (공동주택 지하부위 방수시공 디테일에 관한 연구)

  • Lee, Jung-Hun;Kim, Bum-Soo;Song, Jae-Young;Kim, Soo-Yeun;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2017.11a
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    • pp.215-216
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    • 2017
  • Existing studies highlights the problems about the negative-side waterproofing design of apartment complex underground structures. This study suggests the alternatives for waterproof design construction details of as a solution, and a review on the applicability of this new construction design details through a mock-up construction is provided.

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A Study on Changes in the Density of Eurasian Otter Spraints (2012-2016) - The Busan New Port - (수달배설물 밀도 변화에 대한 연구(2012-2016) -부산신항만-)

  • Cha, Hyoun-Gi;Kim, Ji-Hye;Yoon, Myung-Hee
    • Journal of Environmental Science International
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    • v.26 no.4
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    • pp.457-466
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    • 2017
  • The extensive construction works of container terminals progressed since 2006 was converted to small scaled construction works or reclaiming works since 2012 in Busan New Port area. To investigate changes in activity of otters with the change of construction work scales, the linear densities of spraints at 15 localities of 5 areas (I-V) near the Busan New Port construction areas were surveyed during the period from 2012 to 2016. As the results, the average linear density of spraints has a tendency to increase since 2014. That is, the linear densities of spraints have increased at the area II and IV where the reclaiming works have been progressed, although have decreased or unchanged in the areas I, III and V where small scaled construction works have been progressed. Based on the fact that there were habitats at the Honamdo in the area II and the Yeondo in the area IV, otters seemed to restore their activities around the habitats as the center regardless of the reclaiming works.

Development and Application of a Checklist for Analysis of Non-repetitive Work in Construction Industry (건설작업의 비정형적인 작업분석을 위한 체크리스트의 개발과 적용)

  • Park, Hee-Sok;Lee, Yun-Keun;Ok, Dong-Min
    • Journal of the Ergonomics Society of Korea
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    • v.29 no.3
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    • pp.321-329
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    • 2010
  • Unlike production line works, construction work is non-repetitive in nature. In this study, a checklist was developed to characterize the ergonomic hazards of construction work. Eight existing checklists including OWAS, RULA, and REBA were integrated, and a new version was designed to include more postures of lower extremities. The analysis results obtained using the new checklist showed that manual materials handling (MMH) is the most common risk factor. About 62% of the MMH was done below the knee level or above the elbow level, and 22% was carried out with the trunk twisted more than $60^{\circ}$. The next risk factors were the works done with the knee bent or squatted, or with the shoulders abducted. It can be concluded that the new checklist is successful as a quick and easy tool for screening risk factors of construction works, although it is not capable of determining action levels. Further studies on validation of the checklist are expected.

Modular System Expressed in Structural System of Fashion Since the Late of 20C -Focusing on the Fashion of Yeohlee Teng, John Ribbe, and Galya Rosenfeld- (20세기후반 이후 패션 구성 방식에 나타난 모듈러 시스템 -욜리 탱, 존 리베, 갈야 로젠펠드 작품을 중심으로-)

  • Yang, Hee-Young
    • Journal of the Korean Society of Clothing and Textiles
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    • v.32 no.5
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    • pp.788-799
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    • 2008
  • Since the late 20C, a lot of fashion designers have considered about new construction system in fashion. Many arguments about architectural form and construction system have being supported on enlargement of range of functionalism fashion through the consideration about new shape and combination among various any other spheres. Modular concept, which is able to divide complex construction of integration into separated basic unit and use various and liberal arrangements, is regarded alternative idea of economic construction that creates new shape and constructive beauty through the simple operation and changing combination continuously. Specially, fashion designs of Yoehlee Teng, John Ribber, and Galya Rosenfeld are estimated that they are effectively utilized architectural modular system pursuing multi-function and multi-change in fashion. Modular system utilized in fashion construction will be classified as follows: 1) layering system of Yoehlee Teng, 2) combine system of john Ribber, and 3) lego system of Galya Rosenfeld. This thesis will presents beneficial guide for simple and practical functionalism fashion design development in 21C.

Evaluation for High Strength Concrete using Pullout Test (인발법을 이용한 고강도 콘크리트 구조물의 강도평가방법)

  • Ko, Hune-Bum
    • Journal of the Korea Institute of Building Construction
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    • v.8 no.3
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    • pp.85-91
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    • 2008
  • Out of all the nondestructive test (NDT) methods, the pullout test is one of the most reliable techniques for estimating the strength of concrete under construction. However the pullout test inevitably produces significant surface damage because of the inherent test mechanism and costs too much for using measurement devices. In the view of construction engineers and inspectors, the main purpose of NDT methods for concrete is to verify whether the concrete strength of structure members exceeds the target strength or not. In this paper, a new pullout test method, which involves a pre-installed breaking bolt, with pre-determined breaking torques corresponding to the target strength of concrete, is introduced with related test data. The three types of test, the rebound hammer test, the pullout test, and the new pullout test with breaking bolt, were carried out on wall specimen with three types of concrete strengths. Our results show that concrete strength as evaluated by the pullout test with breaking bolt was similar with cylinder test results. Therefore it can be said that the new pullout test with breaking bolt is a useful method for checking the concrete strength without any surface damages in construction site.

External Environment Analysis of Target Countries for Overseas Expansion of Long-life Housing (장수명주택 해외진출을 위한 대상국가의 외부환경분석)

  • Chung, Joonsoo;Lee, Bora
    • Journal of the Korean housing association
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    • v.26 no.5
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    • pp.71-78
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    • 2015
  • Currently, the Korean construction industry is shifting its interest to the overseas construction market because of a stagnating domestic market. In the meantime, the international housing construction market is expanding with respect to new city development projects that are supported by population growth and urban migration. Despite the Korean construction industry's expertise in new city development, technology, and systems for apartment supply, the share of Korean players in the international housing construction market is continuously decreasing. As a measure to overcome this situation, the authors of this study considered the paper "The Development of a Cost Effective, Long-life Housing Model and Construction of Testbed," which is currently in progress as a part of national project. Through literature review and interviews with experts, the authors determined that there are "column+minimum interior (infill)" apartments that are similar to the long-life housing in some areas of China, Southeast Asia, and Russia. Candidate countries expected to be feasible for the entry of long-life housing were selected by determining the top countries that have already entered the long-life housing market and analyzing those selections through additional specific techniques. The external environments of the selected countries were also analyzed. Please refer to the full paper for details.

A Study on the Application of New Strength Control Model of Concrete Structure using Freiesleben Function (Freiesleben 함수를 이용한 콘크리트구조물의 새로운 강도관리모델 적용에 관한 연구)

  • Kim, Moo-Han;Nam, Jae-Hyun;Kim, Jeong-Il;Khil, Bae-Su
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.7 no.2
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    • pp.135-140
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    • 2003
  • As a construction technique is developed recently, the construction space and construction period are considered to important matters. Especially, in case of construction period, several method is proposed for strength control in the construction field. However there are very little strength control models for application of internal condition. The purpose of this study is to develop a strength control model for application of variety internal condition at construction field. The results are as follows ; 1) According to the results of compressive strength of concrete evaluated by logistic curve and proposed curve, proposed curve is applicable of construction field because there is similar relation with logistic curve. 2) It is shown that the construction period is shortened by reduction of the formwork removal time, because a predicted compressive strength of using the new curve is higher than the proposed compressive strength of standard.

Constructibility Analysis of Self-supported Steel Joint for Automated Construction System (건축물 시공 자동화 시스템을 위한 자립형 철골 접합부의 시공성 분석)

  • Kim, Dong-Keon;Yang, Sung-Woo;Kim, Tae-Hoon;Shin, Yoon-Seok;Cho, Hun-Hee;Kang, Kyung-In
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.05b
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    • pp.1-4
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    • 2009
  • Construction automation and robotics are being introduced as an efficient alternative to overcome troubles caused by lack of skilled labors. To accomplish effective automated construction system, design for automation(DFA) should be performed in parallel with the development of core technologies such as control and sensing of robots. In Korea, the development of robotic crane-based construction automation(RCA) system is progressing, and the research group has recently developed newly designed steel joint to improve the efficiency of the system. However, performance of the new system should be examined prior to its application on construction sites. Therefore, This study analyzed performance of the new steel frame focused on its constructibility by carrying out mock-up test. As a result, the steel frame satisfied the standards of allowable stress and deflection. It also enables to reduce the time for installation.

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