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Article type: Cover
1981 Volume 299 Pages
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Published: January 30, 1981
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Article type: Cover
1981 Volume 299 Pages
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Published: January 30, 1981
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Article type: Index
1981 Volume 299 Pages
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Published: January 30, 1981
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Article type: Appendix
1981 Volume 299 Pages
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Published: January 30, 1981
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NORIHIRO KUDO, YUKOH SHIGEKURA, KAZUMOTO KUROSAWA
Article type: Article
1981 Volume 299 Pages
1-8
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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Corrosion hehavior of reinforcement in concrete was investigated in accelerating condition by autoclave-curing with four kinds of the nitrite-type corrosion inhibitors on the Japanese market. The results are summerized as follows : 1) In case of more than 0.1% chloride content, the corrosion of reinforcement increases strikingly, which well agrees with the former results in other accelerating conditions. 2) Corrosion inhibitors are quite effective for prevention of corrosion, but the safety dosage of the inhibitors must be increased in the autoclaving condition. 3) There is not much difference of corrosion behavior of reinforcement in the ordinary concrete, air-entrained concrete, and air-entrained light-weight concrete. 4) Much corrosion was found under the horizontal bars due to condensation of chloride by bleeding and outside the bending bars due to stress corrosion. 5) The autoclaving test as an accelerating method for evaluating the effectiveness of the inhibitors is usable for its purpose in spite of severer condition than ordinary temperature curing. 6) In case of using marine sand for manufacturing autoclaved concrete products the great care must be taken to inhibit corrosion of reinforcement, on which the further and basic investigation is necessary in future.
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GENGO MATSUI, KENICHI SUDA, RYOICHI NAGAI
Article type: Article
1981 Volume 299 Pages
9-19
Published: January 30, 1981
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To know the wind load acting on highrise buildings, we made the full-scale measurement at the Building No.51 of Waseda University, which has rectangular plan. In this paper, we tried to grasp their quality and quantity of the wind pressures by face-on wind. On the windward face, we summarize them as follows. (1) Pressure fluctuates following to velocity pressure very closely. (2) Therefore, we can see that these frequency distribution fits rather well with that are led from eq. (8) than Gaussian and that the likeness of the distribution of mean, RMS and maximum instantaneous pressure coefficients. (3) At all points including the end area, the envelops of pressure fluctuations are similar. That leads to higher correlation of pressure fluctuation. (4) Nearing the central point, the component of smaller fluctuation, which consists in velocity pressure, disappears gradually. It results that the decay of power spectral density becomes steeper in high frequency region and that the transmitting ratio of turbulence becomes smaller. (5) At the end area, pressure includes small fluctuation generated there. Therefore power spectral density in high frequency region decays rather slowly. On the leeward face, (1) Pressure fluctuation hardly follows to wind velocity. (2) It seems pressure fluctuates actively when wind velocity is higher. According to that, RMS or maximum instantaneous pressure may relate almost linearly with mean or maximum instantaneous velocity pressure. (3) The similarlity in the pressure fluctuations of the central and the end area can hardly be recognized. Therefore the correlation of pressure fluctuation is lower. (4) Allover the leeward face, not only mean pressures are very small, but pressures fluctuate very moderately.
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JUN KANDA
Article type: Article
1981 Volume 299 Pages
21-31
Published: January 30, 1981
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MAMORU OBATA, KAZUO OHTSUKI
Article type: Article
1981 Volume 299 Pages
33-43
Published: January 30, 1981
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This paper is the second report in a series of studies on vertically loaded pile caps. In this paper, twenty eight reinforced concrete pile caps, each with four piles, were tested. The variables involved were spacing of piles, arrangement of reinforcement, type of anchorage and arragement of piles. The results were compared with each other. In regard to the ultimate strength, the experimental results including the those in Part-I were compared with the calculated values according to the equations proposed by others, to the provision for the moment and shear in A. I. J. Building Code Requirements for Reinforced Concrete, to that in A. C. I. Building Code Requirements for Reinforced Concrete and to the equation for the punching shear proposed by authors. Furthermore, forty eight pile caps tested by authors were analyzed by three dimensional finite element method based on elastic theory and the results were comparedwith the experimental results. The following items were clarified : 1. The difference in the arrangement of reinforcement has a little effect upon the extensional rigidity of footing slab, but it can be considered that there is no effect on the initial cracking load, flexural strength and shear strength. 2. The calculated values according to the provision for the moment in A. I. J. Building Code agree well with the experimental results. 3. The calculated values according to the provision for the punching shear in A. I. J. Building Code comform better to the experimental results than those by A. C. I. Building Code provision. The shear strength on the footing acting essentially as a wide beam shall further be investigated. 4. The calculated values according to the equation for the punching shear proposed by the authors agree well with the experimental results. 5. Ohno-Obata's equations to evaluate the flexural and shear strength of the ground-supported reinforced concrete column footing derived from the finite element analysis can also be applied to the reinforced concrete pile cap if some conditions were added.
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Kiyoshi MUTO, Hiromoto TAKASE
Article type: Article
1981 Volume 299 Pages
45-55
Published: January 30, 1981
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Computational methods are discussed for analysing nonlinear dynamic response of columns consisting of stacked block elements. As well as previous report (Part I : Dynamics within Vertical Plane) each element is treated as a rigid body. In that report the analytical model considers a series of columns placed in a vertical plane with boundary structures. In the present report columns and boundary structures need not be placed in a vertical plane. Two dimensional dynamic analysis of Part I is extended to three dimensional one. The characteristics and assumptions of the method are as follows : (1) Blocks move as rigid bodies and the upper and lower blocks are connected at one corner point. (2) Blocks are allowed only to rotate around two horizontal axis, and restricted neither to slip nor twist on the contact surface. (3) The principle of conservation of translational and rotational momenta is applied for the movements of blocks. (4) The collision theory based on a coefficint of restitution is applied for the collision of blocks. (5) 3-dimensional seismic excitation is available for two horizontal and one vertical directions. Theoretical equations such as equations of motion or equations of velocity change are derived from these assumptions. By using these equations, preliminary computer code "COLLAN 3" has been developed selecting appropriate numerical method such as Newmark's β=0 method as numerical integration. Several simple examples are presented to show feasibility of the code. These are free vibration of single prisms and forced vibration of stacked column surrounded by walls.
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NAOKI UCHIDA, FUMIYA ESAKI, KOICHI MATSUNAGA, TSUKASA AOYAGI, MASAYOSH ...
Article type: Article
1981 Volume 299 Pages
57-68
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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Correlatively selecting a 18-storied steel-reinforced concrete building in Sendai City and "Miyagiken Oki Earthquake", June 12, 1978, the paper describes the results of the comparative study made for the elastic plastic seismic analysis results obtained on the basis of the strong erathquake motions recorded on the building and for the actually measured values. Concurrently, transitional changes of pre- and post-earthquake natural period of the building are introduced.
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MASAHIDE TOMII, MASAFUMI INOUE, KOSUKE KURIYAMA
Article type: Article
1981 Volume 299 Pages
69-82
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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Jang Yeul Sohn, Norio Isoda, Masayuki Matsui, Yotaro Kobayashi
Article type: Article
1981 Volume 299 Pages
83-93
Published: January 30, 1981
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KENJI HIROSE, TOSHIRO MIYAKE, SHIGEAKI IWASHITA
Article type: Article
1981 Volume 299 Pages
95-104
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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1. Survey of floor-plan 2. Modellization of floor-plan 3. Modellization of systems of partition 4. Simulation of arranging partition panels 5. Comparison of systems of partition 6. Estimate for quantity of partition panels 7. Comparison between result of simulation and some exsamples which applied to systems of partition 8. Estimate for whole length of wall
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SHIGEYUKI OKAZAKI, CHIKASHI YAMAMOTO
Article type: Article
1981 Volume 299 Pages
105-113
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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This is a study of computer simulation model that made it possible to display perspective view of pedestrian movcment in architectural space on computer's Cathod Ray Tube as well as plan of them. As perspective is viewed from one of pedestrians who walk according to this model, operator feels as if he walked through the architectural space as a pedestrian or escaped through an exit considering spreading smoke. Architectural space designed and delicate pedestrian movement are also examined in simulation respectively to improve its design and algorism of movement.
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KAICHIRO KURIHARA, SHINJI TOMIE, SADAO UEMATSU, SHINICHIRO KADOYA, SHU ...
Article type: Article
1981 Volume 299 Pages
115-125
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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In this paper we clarified obsolescnce tendencies of the literature of each academic field according to 100 divisions level of NDC classification, by estimating the past of the cited literature appeared in each paper and thesis since they were published. In this investigation we've divided the literature into four groupes such as books and periodicals of domestic and/or overseas publication. On the results, most striking points are as follows : 1) Qualitatively the use-ratio of the literature will climb up to the peak in a few years and then descend down exponentially year by year. These obsolescence tendencies are fairly different among the academic fields and/or literature groupes above-mentioned. 2) The literature on the fields of humanities and social sciences have tendencies to be used longer than those on the fields of sciences and technology. Book literature are used longer than periodical literature, and overseas literature are used longer than domestic ones. 3) Obsolescence tendencies of the literature rather well follow to the exponential curve described as the following formula; Y=A+BR^X X=past years of the cited literature appeared in each paper and thesis Y=cumulated percentage for total number of cited literature according to above-mentioned four groupes in each academic field A, B, and R=constant number We showed the value on the obsolescence tendencies of the literature which made clear relations between aging and cumulated percentage of use in each academic field by calculating from this formula. These values will be useful to academic library and research library planning.
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SOICHI YAGISAWA
Article type: Article
1981 Volume 299 Pages
127-134
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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I will describe that the construction and supervision over crematorium has shifted to public management based on historical fact. And also based on the investigation I will make the following subjects clear and extract some tasks in making plans. The Subject : The organization of the district-government which supervise the facility, concerned division, contents of operation, fee for use, cost of operation and structure of the staff member. The outline of the outcome is as following. (1) The fact that crematorium is generally supervised by public management except in some large cities must be acknowledged. In another word crematorium holds position as a foundamental living environment. (2) Constructor is antonomy such as city, town or village. Because of the smallness the facility is often included in a graveyard or constructed jointly with sanitary facility, and moreover it is often within the jurisdiction of an integrated administration of a large region. In each case it is supervised by a kind of sanitary bureau. Consequently on its construction consultation of an architecture from the first stage will be essencial. (3) Crematorium is apt to be isolated even in the place of business and the supervision is also left to them. On Tomobiki-day it is usually closed. The holidays of it are not the same as those of general administration's office. As the result the voices of the operating spot hardly reach to the jurisdiction. (4) The idea that crematorium must be kept away from the city area or concealed from inhabitants should be reviewed, for innovation in cremation furnace and change in the contents of operation have been made. (5) Judging from the fee-system crematorium seems to be regarded as a welfare facility. In many cases the fee is free or very cheap. On the contrary, there are cases the fee is caliculated on the base of substancial cost. That is a new tendency including the tendency of revision of public fees. Reexamination of not only working cost but also investment expenditures such as ground, architecture and furnace must be done, considering its service for a long period. This outcome must be reflected on the cost planning of the architecture. (6) In many cases the crematorium is operated by the minimum staff. Besides the staff's rotation in job seems immovable and they are incapable to improve the furnace or funeral ceremony. Rexamination of job training and exchange of staff are desirable.
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KENJI MITSUYOSHI, SATOSHI HAGISHIMA, AKIRA OHGAI
Article type: Article
1981 Volume 299 Pages
135-146
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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The purpose of this paper is to make clear the tendency of the relocation of establishments in the Central Business District of Fukuoka City. Hayashi's Quantification Theory is accepted as optimal method for this purpose. Establishments are classified into three groups in C.B.D.; the first group is establisnments which take to another place within C.B.D., the second is establishments which remove from the external area to C.B.D., and the third is establishments which is newly located in C.B.D., It is discussed on the way of contact between each establishments, the factors on the reason of removal and the evaluation to the present place of establishments. Finally, three types being concerned in the relocation of estabilshments were shown. 1) The first type is establishments of which are were insufficient for extension of business, and which relocated in the superior place of contact condition, and thereafter again hope the change of place because of small area of office. 2) The second type is establishments which moved in pursuit of accesibility to city core and relocated in the superior place of contact condition, and thereafter again hope the removal because of small area. 3) The third type is establishments which were newly established by the cause of integration of business in C.B.D., or distributed with removal of allied enterprise.
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SHINGO TAMAKI, NAOFUMI ODA
Article type: Article
1981 Volume 299 Pages
147-154
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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This paper deals with the correspondence between the distributisn of number of dwelling rooms and the distribution of number of household members. After that, the distribution of number of surplus rooms per household is analyzed by time trend and tenure of dwelling. The conclusions are as follows. 1. The distribution of number of the dwellings by number of rooms may be closely resembled to the Normal distribution, and the distribution of number of households by number of household members may closely resembled to the Gibrat distribution, in prefectural and national level. One of the housing problems is caused by the discrepancy between both distributions, and the other one is caused by the results that people occupy the dwellings which have uncorrespondense number of rooms to size of his household. 2. In the owned house group, the total number of dwelling rooms exceeds the total number of dwellers. Nevertheless, about 10% of households live in the less room house than his family size. This reason is explained by presences of the people who occupy the dwelling, having more rooms than his family size, who account for about 50% of the owned house group. 3. In rented house group, one of housing problems may be caused by the facts that numerous small houses have been supplied, and most of these houses have only two or three rooms. So, many families are constrained to live in the less room house against their family size. They account for about 30% of their group. On the other hand, about 20% of rented house group live in the more room house than their family size. 4. Distribution of number of surplus room per houshold, which is defined as number of rooms minus number of household members in each dwelling, is proved to be closely applyed to the Normal distribution.
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Yuji AGEMATSU
Article type: Article
1981 Volume 299 Pages
155-165
Published: January 30, 1981
Released on J-STAGE: August 22, 2017
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