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          • P.C Panel과 H-Beam의 볼트접합에 의한 橫力 抵抗 시스템

            朴善大,朴鶴吉 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

            There are many types of lateral structural resisting systems (framed system, braced system, shear wall system, Tube system, core system, etc), which are basically based on structural subsystem. There are three primary types of 2D or 3D vertical subsystems in buildings (1) Wall subsystems; (2) Vertical Shafts; and (3) Rigid Beam-Column frame. Wall are very rigid subsystem in their plane and may be made up of solid concrete panel, braced timber, steel trusses, and so on. Shafts are stiff 3-D tube structures and are usually made up of four solid or trussed walls for ventilation and services. they can carry vertical loads and serve as excellent horizontal-force resisting elements. they also have some problems, which are space planning inflexibility, disagree between horizontal stiffness center and inertia center, construction problems and soon. Rigid-frame subsystems are very good for space planning flexibility, but vertical resisting stiffness is very small. This study is a structural model analysis for rigid frame with P.C panel to increase lateral stiffness for rigid-frame subsystem. we modeled exterior spandrel beam bolted with P.C panel which is acting as shear wall action. The analysis results showed vertical stiffness increasement. if we apply this method to rigid-frame at inter and exterior wall, we can esealy large increament of the lateral stiffness of the rigid-frame.

          • 부산시 현대화초등학교 다목적공간의 공간구성에 관한 연구

            유길준 동아대학교 건설기술연구소 2002 硏究報告 Vol.26 No.1

            The purpose of this study is to analyze composition of multipurpose space at modernized elementary school in Busan. The results of this analysis indicate the followings; 1)The multipurpose space, multipurpose hall and audio-visual room in resent years is organized at almost schools. 2)The area of multipurpose space is 40㎡-50㎡ per and their depth os gradually increasing over 6m. 3)The multipurpose space which are located parallel to each classroom and separated by movable partition is most common type in modernized elementary schools.

          • 輕量骨材콘크리트의 流動特性

            안재철 동아대학교 건설기술연구소 2002 硏究報告 Vol.26 No.1

            This study is to investigate rheological properties (slumping behavior & segregation-resistibility) of lightweight concrete and present fundamental data for mixing design of lightweight concrete. As a result of this study, it is suggested that slump target for quality control of fresh lightweight concrete will be set up differently from normal concrete. Because, unit weight of lightweight concrete is much smaller than normal concrete, though rheological constants(yield value) of NC is the same as LC's, these slump values are very different. And, segregation-resistibility can analysis as quantitatively taking advantage of unit weight of all-lightweight concrete. lightweight concrete using ultra lightweight egg. showed segregation when the slump is more than 20㎝, also the more quantity of paste have, the movement of aggregates cover a wide range.

          • 연약점토층 위에서 선행하중의 제거-재압축에 따른 점토지반의 거동

            정성교,이남기,조기영,김문규 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

            Little has been known about the characteristics of short-term and long-term resettlements on soft clay, such as elastic behaviour and secondary compression due to partial removal of preloading. In this study, different types of oedometer tests on a natural soft clay were peformed for examining such characteristics. As the results of the experiments, the characteristics of short-term and long-term resettlements such as rebound ratio, resettlement point and rate of secondary compression depends on the overconsolidation ratio(OCR) and preloading time. It is showed that resettlement point increased with increasing preloading, but such is not for rebound ratio and rate of secondary compression. This reason would be due to rearrangement of clay particles. And rebound ratio and resettlement point increased with increasing the OCR, but such is not for rate of secondary compression. The correlations between them is showed all the linear relations in a semi-logarithem or log-log plots, and then can be used for settlement prediction in field, as well its results can be compared with those of conventional method. from the comparative results of settlement prediction, it is found as follows : The amount of rebound due to partial removal of preloading and resettlement due to reloading are similar for both methods. But the amount of secondary compression due to partial removal of preloading by this correlation is rather overestimated than that of conventional method, because it would be underestimated the duration of primary consolidation. And for different loading histories, the compression is affected by strain rate(ε_(v)), that is, the compression increases with decreasing strain rate.

          • 초음파 분석장비(UMQA4)를 이용한 파일의 건전도 시험을 위한 모형실험

            박종남,이재경,김현건 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

            The ultrasonic logging method is one of the earliest methods of checking the integrity of pile. The main purpose of the paper is to conduct the model test in water to qualify the ultrasonic analyser, UMQA4, in its accuracy and repeatability and to offer basic information for effective analysis with the field data by model testing of the scaled concrete pile, and thus to increase the applicability of the apparatus. The result of experiment shows that the system is stable and excellent in repetition; and relatively easy and rapid in locating any defects in the pile in vertical section, but not in horizontal one, which should be studied further by tomography, etc. Also, further study on model-test should be done for its applicability to classifying near-surface rock mass features.

          • 고정벽체에 작용하는 횡토압에 대한 모형실험

            남선우,김문규,배선호 동아대학교 건설기술연구소 1997 硏究報告 Vol.21 No.2

            To examine lateral earth pressure against fixed wall due to geometry of backfill, a model test was carried out. Soil box (180×75×80mm), 2-directional load cell and rainer were made for this test. And Sumjin river sand as backfill materal was placed in the backfill space with different geometries and relative densities. This test result was compared with the extended Silo theory(Chung et at, 1997) and Jaky's lateral pressure at rest. The comparative results are as follows : When the bottom width between the model wall and the stable slope is narrow, the experimental pressure agree well with that of the extended theory, independent of inclinations of wall and stable slope. However, when the width is not narrow, ie, when Bc/H is larger then 0.333, the experimental pressure is preferably close to the Jaky's lateral pressure at rest. The angle of wall friction have an important effet on the experimental lateral pressure, as wall as bottom width. The wall friction angle was measured the peak at lower placing height, and just after that the value is roughly constant up to the residual state.

          • 건축 프로그래밍 및 설계의 협동작업 체계화를 위한 형식주의적 설계 방법론 고찰

            조용수 동아대학교 건설기술연구소 1996 硏究報告 Vol.20 No.1

            A method of architectural formalism focused on collaborative work is presented through semiotic logic in the discourse of architectural communications, which can be a framework for architectural design groupware. Based on the repetitive synchronous and asynchronous process. its unique communicational characteristics of design collaboration through network were considered to make an adequate and realizable tool for architectural design.

          • 방파제 평면 배치에 따른 항내 정온도에 관한 연구

            민병형,민일규,이정환,강성기 동아대학교 건설기술연구소 1999 硏究報告 Vol.22 No.2

            The harbor Calmness decides is hydraulic and numerical medel test. The study is Hongdo harbor building of accompany that hydraulic and numerical motel test as breakwater plan arrangement for analysis of in harbor clmness and The harbor operate rate as invsetigates is result as numerical model test. This summarize shoes the following result 1. The analysis result is nearly agreed of hydraulic and numerical model test. 2. The analysis result is case.4 is very calmness of hydraulic and numerical model test and case.1 is failed, case.2, case.3 of campared as case.3 of judged that more calmness of arrangement all borken course. 3. The analysis test results of the harbor operate rate case.1 is samall then another cases that critical wave height of anchor area but the calmness of anchor area of the case.1 that is much broarder than Hongdo anchor area therefor case.1 was decided no problme that ship is used harbor. This study result will be used of Hongdo harbor in the future for plan building of breatwater. The future for hardof high exactly as hydraulic and numerical model test especially, the will be studied numerical model test for beach reflection, breaking wave height, submerged friction.

          • 알긴산 溶解物을 혼합한 厭縮 흙벽돌의 開發에 관한 實驗的 硏究

            안재철,강병희 동아대학교 건설기술연구소 1999 硏究報告 Vol.23 No.2

            This study is about experiment on traditional method using soil to create compressed soil brick. The soil needs water to develop fluidity in the field in different from the hydraulic cement, which cause the drying shrinkage definitely. So, the development of the soil as dry materials is more suitable than the mortar in the field. As a result, compressed soil brick using alginic acid is strong against compressure, and little deflection against drying shrinkage. So, we consider that it is possible to be used in the field as construction materials.

          • 부산시 중심시가지 활성화 방안에 관한 연구

            윤상복,채성주,윤시운,오석기 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1

            Urban management and C.B.D continuance's problem as a result of the extension of the city area and the existing commercial area's shrink due to city spatial structure lead to a lot of problems including doughnut phenomenon. The purpose of the this study is to figure out ways toward the strategies of commercial area prosperity that acts up positively to the multiple C.B.D by the change of urban spatial structure. The strategies of the commercial area prosperity in existing C.B.D were presented by dividing the recover of city function and the self-efforts for shopping facilities. To recover city function, first is to secure a settled population in hinterland. Second is to extend and complete of C.B.D function. Third is to improve that attractive element of C.B.D

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