鋼管 管水路 構造 設計의 確率論的 硏究

裵尙根 慶北大學校 1990 論文集 Vol.50 No.-

In the structural design of pipelines, the currently used methods do not provide a realistic assessment of either the actual safety of a structure or the reliability of the pipe response under a assumed service loading. This may be largely attributable to the inadquate determination of design factors that currently enter into calculations are in reality associated with some uncertainty. In this study, probability theory was employed as a comparative tool relating the safety implications of the current design method to past experince. In order to calibrate the current design method with the limit state design procedure, the probabilities of failure and partial safety factors for the design parameters were computed. The computed results showed that the design results based on the current procedures for the steel pipeline design have a probability of failure of 4∼8%, according to the limit state principles, and in order to maintain a confident level of reliability in the current design, applying partial fators of safety instead of the global factor of safety is more desirable.

地下埋設 管渠에 作用하는 荷重의 變動에 關한 硏究

裵尙根 경북대학교 산업기술연구소 1992 産業技術硏究誌 Vol.20 No.-

In the structural design of pipelines, the currently used methods do not provide a realistic assessment of either the actual safety of pipelines of the reliability of pipe response under a assumed service loading. This may be largely attributable to the inadequate determination of design factors that currently enter into calculations are in reality associated with some uncertainty. In order to study and suggest the design method for underground pipelines based on the reliability analysis several design parameters should be handled, and the design method may be very complicated and unconvenient to use. Among the design parameters, the loads acting on the pipeline due to the backfill are usually being calculated by using the Maston's formula which also contains several design factors. Therefore, it is considered to be reasonable that the loads on the pipeline are taken to be one random variable to simplify the design procedure. The parameters related to the backfill load are considered to be random variables, and random numbers of the parameters are generated. The backfill loads are calculated by using the generated random numbers. The results are analyzed by the multiple linear regression technique, and regression equations, by which coefficients of variation of the backfill loads can be calculated from the design parameters related to the backfill loads and their coefficients of variation, are proposed and the type of the distribution for the calculated backfill loads is investigated.

確率論에 依據한 地下埋說 剛性管渠의 構造設計 方法에 關한 硏究

裵尙根 慶北大學校 1991 論文集 Vol.51 No.-

Until recently the current design procedure for underground rigid pipelines has been dominated by deterministic thinking, characterised in design calculations by comparing the minimum supporting strength of the pipeline with the maximum applied load on the pipeline. This procedure does not provide for a realistic assessment of either the actual safety of structures or the reliability of the pipe response. In this study, probabilitic theory was employed to relate the safety implications of the current design method to the past experience and a reliability-based design method is proposed. A computer program was made, based on the level Ⅱ method of reliability analysis and a series of computations was conducted. From these results, a series of graphs was prepared, showing the relationships between the probability of failure and total applied load on the pipeline, the global factor of safety or the partial tactor o| safety. By the use of these curves, for the given total load, probability of failure and coefficients of variation of materials, the pipe strength and the bedding factor, the appropriate foundation type and bedding factors can be found.

地下水와 流域의 上流部에 위치하는 湖水의 非定常 交流에 대한 數値解析

배상근 啓明大學校 産業技術硏究所 1996 産業技術硏究所 論文報告集 Vol.19 No.1

The purpose of this study is to investigate the measurement of water exchange and a variation of the groundwater flow system between groundwater and lake water. A hypothetical flow through lake located at the upper portion of a watershed is considered. Groundwater flow is numerically simulated during 360 days under three dimensional transient condition. From the above simulation, it can be concluded that the amount of inflow from groundwater to a lake are less than the amount of discharge to groundwater in a lake watershed at all times. The changes of groundwater flow system are occurred small in the lower portion of lake. But those are occurred large in the upper portion of it.

수문곡선분리법을 이용한 평창강 소유역의 지하수 함양량 산정

배상근 ( Sang Keun Bae ),이승현 ( Seung Hyun Lee ) 한국물환경학회 2004 공동 춘계학술발표회 Vol.2004 No.-

河川水와 地下水의 交流에 關한 硏究

裵相根 啓明大學校 産業技術硏究所 1988 産業技術硏究所 論文報告集 Vol.10 No.-

A steady state three-dimensional model for the groundwater flow system of field problem is simulated. The patterns of groundwater potential generated by the mathematical model are used to interprete the groundwater flow. with the aid of four representative vertical cross-sections, interaction between stream water and groundwater are analyzed. The transport areas of pollutants in the groundwater aquifers and the stream waters are assummed by means of groundwater flow system. The results show that the numerical model could be used as an effective means to estimate the interaction of stream water and groundwater, and to predict the distribution of contaminant and to shed light on the groundwater pollution control.

주민자치의식의 문제와 해결방안

배상근 慶尙大學校 經營行政大學院 1995 最高管理者課程論文集 Vol.7 No.-

대곡 위생매립장 주변의 지하수유동

배상근 啓明大學校 産業技術硏究所 1997 産業技術硏究所 論文報告集 Vol.20 No.-

The Taegok Landfill is a 28,285㎠ municipal waste disposal site located at south of Nakdong River, Taegu City. The site is surrounded on three sides by mountainous basin boundaries. The prior step to estimate the transportation of pollutants in groundwater from the landfill was an analysis of groundwater flow system around the landfill. A three-dimensional finite difference model to study groundwater flow system in heterogeneous porous media is developed. The finite difference equation is solved fully implicitly using strongly implicit procedure. The results of the study show that the groundwater recharged in the mountainous area plays an important role to the groundwater flow system in the study area. The simulation also indicates that the groundwater flow patterns occurred from southern part of the mountainous area are more complicated than those occurred from other areas.

大邱地域의 地下水流動系의 解析

裵相根 계명대학교 산업기술연구소 1991 産業技術硏究所 論文報告集 Vol.14 No.2

Groundwater flow system in Taegu area were analysed. For perspectives of the groundwater flow system and compares with the results of numerical simulation, water quality were used as groundwater tracer. A steady state three-dimensinal mathematical model was simulated to represent the reginal groundwater flow pattern. With the aid of seven representative vertical cross-sections and recharge-discharge profile, groundwater flow system in the study area were assumed. The results of these were resonally good comparable with the results of the water quality distributions.

Computer를 利用한 梯形水路의 水面曲線에 對한 硏究

裵相根,金甲洙 慶北工業專門大學 1979 論文集 Vol.16 No.-

The flow of water in a conduit may be either openchannel flow of pipe flow. The two kinds of flow are similar in many ways but differ in one important respect. Openchannel flow must have a free surface, whereas pipe flow has none, since the water must fill the whole conduit. A free surface is subject to atmospheric pressure. pipe flow, being confined in a closed conduit, exerts no direct atmospheric pressure but hydraulic pressure only. Despite the similarity between the two kinds of flow, it is much more difficult to solve problems of flow in open channels than in pressure pipes. Flow conditions in open channels are complicated by the fact that the position of the free surface is likely to change with respect to time and space and also by the fact that the depth of flow, the discharge, and the slopes of the channel hottem and of the free surface are interdependent. Reliable experimental data on flow in open channels are usually difficult to obtain. In this paper, in order to development of basic program for flow profiles, which flows into trapezoidal channel, flow profiles is computed for gradually varied flow by von seggern's method, which method is belong to direct integration. Here, computer, which has been use not only science and engineering part but Enery part for acuuate and rapid computation, is used for calculation of gradually varied flow.