山口大学工学部研究報告第54巻第1号目次


  1. 気泡プルームによって生じる水表面近傍の乱流構造
    朝位孝二 , 坪郷浩一
    要旨】【本文(PDF)

  2. 塩分濃度が異なる純粋粘土鉱物の残留強度
    鈴木素之 , 山本哲朗 , 笹西孝行 , 菅原真由美
    要旨】【本文(PDF)

  3. 洪水発生限界モデルによる流出解析と予測
    塩月善晴
    要旨】【本文(PDF)

  4. An Algorithm to form a D-stable Coefficient Set and its Application to the Determination of l^2 D-stability Radius
    Fumitake Fujii , Kenzo Wada
    要旨】【本文(PDF)

  5. 山口市における歴史的中心市街地の地区更新
    中園眞人 , 大内裕子 , 中原弓恵
    要旨】【本文(PDF)

  6. 農村地域における定住促進のための空き家活用制度の事例分析
    中園眞人 , 山本幸子 , 大内裕子
    要旨】【本文(PDF)

  7. 鉄筋コンクリート建築物における表面部材設計のための日常想定外力の予測手法
    馬場明生 , 佐藤俊介 , 渡部嗣道 , 田原督弘
    要旨】【本文(PDF)

  8. 小野田徳利窯の基本形状に関する調査研究
    河原利江 , 馬場明生 , 台信富寿
    要旨】【本文(PDF)

  9. 流体モデルによる交通シミュレーションの作成および交通信号系の交通流解析
    児野貴幸 , 樋口貴幸 , 久井守
    要旨】【本文(PDF)

  10. 小規模公営住宅における高齢世帯の住まい方−宇部市HS団地の事例分析−
    中園眞人 , 大庭知子 , 佐々木俊寿
    要旨】【本文(PDF)

  11. 表面部材の接着一体性および崩壊の限界予測に関する理論的研究
    馬場明生 , 渡部嗣道 , 守明子 , 森田和宏 , 川手洋 , 佐藤俊介
    要旨】【本文(PDF)

  12. 湿式仕上げ材の吸水抑制効果予測手法の提案
    馬場明生 , 野村和也 , 河原利江 , 原田進
    要旨】【本文(PDF)

  13. 宇部市営住宅団地の類型化とストック改善計画方法論
    中園眞人 , 高須賀由枝 , 佐々木俊寿
    要旨】【本文(PDF)

  14. プレス成形および射出成形による竹繊維グリーンコンポジットの開発
    合田公一 , 北村佳之 , 大木順司
    要旨】【本文(PDF)


要旨一覧

気泡プルームによって生じる水表面近傍の乱流構造
朝位孝二 , 坪郷浩一
要旨
Eckenfelder pointed out that an air-water gas transfer coefficient for air bubbles rising through a column of water was proportional to 2/3 power of water depth. To investigate this mechanism, turbulent flows induced by air bubble plume were measured by using Laser Doppler Velocimeter. The main results obtained in this study are as follows: (1) Both the horizontal and vertical turbulent intensities are nearly constant in the vertical direction in the bubble plume. (2) Both the horizontal and vertical turbulent intensities are enhanced near the water surface out of the bubble plume. (3) The magnitudes of the vertical turbulent intensities near the water surface are proportional to the aeration water surface out of the bubble plume.
本文(PDF)
塩分濃度が異なる純粋粘土鉱物の残留強度
鈴木素之 , 山本哲朗 , 笹西孝行 , 菅原真由美
要旨
If a clay on a slip surface in a landslide has an exchangeable cation e.g. Na montmorillonite, consistency and shear strength of the clay may be changed by the ion concentration of sodium. This paper describes the influence of salinity on peak and residual strengths of kaolin and Na montmorillonite. Ring shear tests were performed on specimen prepared under different concentrations of NaCl solutions. Main conclusions are as follows. Firstly, the consistency limits decreases with increasing the salinity. Secondly, the internal friction angles are almost constant to the change in salinity, whereas the apparent cohesions increase with increasing the salinity.
本文(PDF)
洪水発生限界モデルによる流出解析と予測
塩月善晴
要旨
A new simple method for runoff analysis and prediction will be introduced in this paper.We can express the basin water budget by Eq.(1) and the flood critical circumstance of river basin by Eq.(2), respectively, where all hydro-terms reach to the saturated with suffix c, like as, rainfall R→Rc mm/hr, river flow at basin inlet Q1→Q1c m3/s, river flow at basin outlet Q2→Q2c,indirect runoff Qw→Qwc, evaporation e→ec mm/hr, base flow Bf→Bfc mm/hr, storage change of basin water ΔW→ΔWc mm/hr, infiltration g→gc mm/hr. Here, alp is called the rainfall coefficient in this paper and is used to formulate the direct runoff from rainfall, alp×R. When we have much more R and Q1 in this critical state, the flooding flow Q2 can be expressed as Eq.(8) by subtracting Eq.(2) from Eq.(1). As we can set Bfc≒Bf, ΔWc≒ΔW, gc ≒g and ec = e = 0 in the critical state, the river flood O and the inundation I can be written as Eq.(6) and (8), respectively. The new necessary river conveyance capacity Q2cN is written as Eq.(11) well to drain both of O and I, where (1-zet) ×I is the direct runoff and II is the indirect from accumulated inundation Is.Here, zet is called the stagnant coefficient.The flood critical state for us is mainly determined by the river conveyance capacity, while for other beings like fishes, birds, and aquatic animals must there each flood critical.Various different flood critical states will be defined for some beings even when the low river water stage.Therefore, it may be considered that the present flood critical model can be applied to any states of river flow and can be used to estimate new flow Q2cN.The results of runoff analysis show the present method to be useful for not only the analytical work but the predictive work in cases of river basin with small alp.
本文(PDF)
An Algorithm to form a D-stable Coefficient Set and its Application to the Determination of l^2 D-stability Radius
Fumitake Fujii , Kenzo Wada
要旨
This paper concerns the zeros of a polynomial inside a given circle in the left half complex plane. Marden provided an algorithm to determine the number of zeros which a given polynomial has inside the unit circle by using only its coefficents. In this short article, it will be shown that the result can be extended to more general case where the center of the circle is on the real axis and its radius is arbitrary. The execution of the proposed algorithm will produce a set of inequalities which serve as an algebraic expression of a D-stable set in the coefficient space. It should be emphasized that those expressions are suitable for controller design sonsideration in the coefficient space. The determination of l^2 D-stability radius as an application of the result and its related theorem will also be dictated.
本文(PDF)
山口市における歴史的中心市街地の地区更新
中園眞人 , 大内裕子 , 中原弓恵
要旨
The purpose of this study is to clarify the planning subjects for improving the residential environment in the central area of local city by the research on the characteristics of land use transition and dwellers. Ohdono, subject of this study, is the historical and central area in Yamaguchi-city, and many historical sites and traditional houses called MACHIYA built in Meiji- period exist and quiet residential environment has been kept even now.But the same as other local cities, decrease in population and aging of dwellers are in progress, so the ratio of single households is highest and the number of elderly person over 60’s occupies 77.7%, moreover, owing to the increase of vacant resident, vacant lot and parking, this area is becoming hollow, and owing to the construction of new buildings, the residential environment is changing gradually.
本文(PDF)
農村地域における定住促進のための空き家活用制度の事例分析
中園眞人 , 山本幸子 , 大内裕子
要旨
There are many vacant houses in rural districts, but these housing stocks are not used effectively. Then, it has the fear that the housing system for vacant houses isn't functioned efficiently. The purpose of this research is to clear the present role of the system. The investigation of the improvement of these houses and living style of the dwellers was done. The main systems can be sorted in three types and the difference of the contents of improvement and living style is analyzed.
本文(PDF)
鉄筋コンクリート建築物における表面部材設計のための日常想定外力の予測手法
馬場明生 , 佐藤俊介 , 渡部嗣道 , 田原督弘
要旨
A predictive method is proposed for axial strains and curvatures of thermal movements of surface components on the basis of one dimensional steady heat transmission model and unsteady one, which are the causes of exfoliation failure phenomena of surface components. Thermal movements of two types of surface components with actual specifications are calculated. As a result, thermal movements due to shifts of surface temperatures in time are clarified.
本文(PDF)
小野田徳利窯の基本形状に関する調査研究
河原利江 , 馬場明生 , 台信富寿
要旨
This paper deals with the preservation of Onoda Bottle Kiln which was built in Taiheiyo Cement Factory in Onoda City. October 2000, the excavation started around the kiln so that three clay brick masonry foundations connected with the existing kiln and two small foundations in the east and one foundation in the west were found. And many brick masonry units and prisms were also found in this investigation. From results of uniaxial compression tests about these units and prisms, it was clarified that the brick masonry units and prisms used for Onoda Bottle Kiln had large capacity of deformation. And it was also clarified of this kiln.
本文(PDF)
流体モデルによる交通シミュレーションの作成および交通信号系の交通流解析
児野貴幸 , 樋口貴幸 , 久井守
要旨
This paper presents a macroscopic traffic simulation constructed through hydrodynamic model. The purpose of the simulation is to describe the fluctuation of traffic density distribution all over the network consisted of signalized intersections. Links are divided into segments. Traffic density of each segment is updated by time scanning procedure. By using the simulation, relationship between delay and offset, and relationship between delay and common cycle length were obtained. The traffic density distribution near the signalized intersection was also obtained and the influence of q-k model, especially triangle-shaped and trapezoid-shaped q-k model was examined. Furthermore, the simulation was applied to the optimization of offset. GA was used to optimize the offset.
本文(PDF)
小規模公営住宅における高齢世帯の住まい方−宇部市HS団地の事例分析−
中園眞人 , 大庭知子 , 佐々木俊寿
要旨
The object of this research is HS housing complex owned by Ube-city.As for the Ube city-owned residence about 30 percent of the whole is wooden and semi- fireproof building, and rebuilds and abolition are considered. Updating of these stocks will become the main enterprise for ten years from now on.Moreover, the durability of public housing built in the 1970s is will be exhausted, and rebuilds of vast quantity of stocks will be difficult in view of the amount of enterprises in recent years. Therefore, Ube-city also has to recommend the improvement of the stock in 1970s.This research analyzes living style of elderly households in small space public houses, and shows the extraction at the time of the dwelling improvement.
本文(PDF)
表面部材の接着一体性および崩壊の限界予測に関する理論的研究
馬場明生 , 渡部嗣道 , 守明子 , 森田和宏 , 川手洋 , 佐藤俊介
要旨
This paper deals with the exfoliation mechanisms of surface layers usually bonded to concrete and masonry components in order to establish the safety design methods of buildings, that is to say, preventing from any damage under daily external forces, standard disasters such as rare earthquakes and any exfoliation under extremely rare earthquakes. Three fundamental mechanisms are clarified to control a whole process through the initiation to the final fracture. As a result, the effects on normal stresses in surface layers and shear stresses on boundary surface of the layers are predicted quantitatively on the basis of geometry, mechanical properties and various kinds of differential movements.
本文(PDF)
湿式仕上げ材の吸水抑制効果予測手法の提案
馬場明生 , 野村和也 , 河原利江 , 原田進
要旨
It has been clear that the water content of building structures is an important factor on carbonation of concrete by a past study using a model building at the age of 11 years’ natural exposure, not to speak of frost damage. In this paper, the water absorption experiment using specimens of ALC, concrete and clay bricks are dealt with wet finishings and a method for predicting control effect on water absorption of wet finishings is proposed. As a result, a predictive model composed of finishings, surface layer and inside of structural bodies, are clarified to be effective.
本文(PDF)
宇部市営住宅団地の類型化とストック改善計画方法論
中園眞人 , 高須賀由枝 , 佐々木俊寿
要旨
Reproduction of the superannuated public housing and aging of the resident have become a problem now. Fireproof public housings in the 1970s need the various correspondences which combined reconstruction, the improvement of a total dwelling unit, and the partial improvement.Then, we grasps the characteristics of housing estates by utilizing geographical conditions, the ratio of aging, the ratio of the waiting for moving in,etc.The first purpose of this research is examining the planning assignment and the prior ranking of the stock improvement by typing the characteristics of housing estates and grouping it , and the second purpose is creating a planning method for improving the housing stockand
本文(PDF)
プレス成形および射出成形による竹繊維グリーンコンポジットの開発
合田公一 , 北村佳之 , 大木順司
要旨
The purpose of this study is to apply bamboo fibers to biodegradable resin matrix composites, the so-called “green” composites, preferably in place of practical engineering plastics. Press forming and injection molding were used for fabrication of the composite. The result showed that the composite by press forming was 36.2 MPa in tensile strength and 5.91 GPa in Young’s modulus. The composite was also compared with the composite fabricated by injection molding. The latter indicated about a half in both strength and modulus, because bamboo fibers were damaged during fabrication by injection molding and largely decreased in length.
本文(PDF)


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