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Volume 154
Displaying 1-13 of 13 articles from this issue
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Article type: Cover
1968Volume 154 Pages Cover1-
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSDownload PDF (49K) -
Article type: Cover
1968Volume 154 Pages Cover2-
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSDownload PDF (49K) -
Article type: Index
1968Volume 154 Pages Toc1-
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
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YOSHICHIKA UCHIDA, HIDETAKA UNO, ZAN CHIE WU, KOHYA YAMAMOTOArticle type: Article
1968Volume 154 Pages 1-8,75
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
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KENZO WASHIO, YOSHINOBU MITTSUI, YOSHIHIRO NISHIDA, T. TANAKA, N. HISA ...Article type: Article
1968Volume 154 Pages 9-18,75
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
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SHOJI KOBAYASHIArticle type: Article
1968Volume 154 Pages 19-24,75
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSIn the foregoing four parts of the series, the problems of the stream with ordinary velocity around plates and buildings have been mainly dealt with to get the pressure distribution, etc., on the assumption that the separation starts at the edge or the corner of the wall surface. This time, however, the author tries to clarify the phenomena of the stream with low velocity around plates and squares, which are observed in the ventilation through the louver and underground-water, by means of two-dimensional potential theory, and confirm the regulation now in force about the wind pressure distribution. (1) The considerably wide range of negative pressure near the edge as shown in Fig. 6 and Fig. 11 can only exist in the slow stream without separation, but in ordinary wind, separation starts at the edge and makes the range of negative pressure narrower, which moreover depends upon the wind direction. (2) The comparison between Fig. 7 and Fig. 8 makes us understand that the longer the eaves, the more uniform the pressure distribution between the roof and the ground becomes, that is, the remarkable effects of end plates. (3) When two tall buildings of square plan type stand in line as the plates of Fig. 12, the pressure distribution on the front surface are not so much affected by their proximity except the slight shift of the stagnation point toward the gap, while the negative pressure on the side wall of the gap tends to increase remarkably, so that caution must be paid to the strength calculation of sashes and window-panes on this side.View full abstractDownload PDF (551K) -
MASAHIDE TOMIIArticle type: Article
1968Volume 154 Pages 25-32,75
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
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TOSHIRO SUZUKI, MAMORU KIMURAArticle type: Article
1968Volume 154 Pages 33-38,76
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSThe pourpose of this paper is to analyze the torsional problem of built-up girder with the stiffness matrix method. The stiffness matrix method is finally equal to the displacement method which is satisfied the equilibrium conditions at the points of contact. But on the semi-closed section, we must consider the width of member. Then, we assumed as followes 1) The cross section area of member is undeformed and remains plane 2) The torsional rigidity of each member is only St. Venant's torsion. From these two assumptions, making the transformation matrixes of the stress, T_f, and the deformation, T_u, the main stiffness matrix reads K=T_fT^TkTT_u where T is the co-ordinate transformation matrix and k is the individual member stiffness matrix. Farther in order to check the appropriateness of this theory, we experiment. Generaly, in this kind of the torsional experiments of built-up girder, the influence of warping restraint is significant. Then on our experiments, we design the experimental system without restraint. The summary of this paper is as follows. 1) On analyzing the space frame, if we must consider the width of member, it is useful that we analyze with substituting the stiffened rod for the width of member. 2) The member of short length is influenced by the condition of ends, and the torsional rigidity decrease owing to the deformation of cross section on the end. 3) Increase of the torsional rigidity is due to the restrain of warping deformation for the most part.View full abstractDownload PDF (1142K) -
KOICHIRO YAMADAArticle type: Article
1968Volume 154 Pages 39-45,76
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSThis paper is the continuity of the previous paper written by the author in Transactions of Architectural Institute of Japan, No.126, in August 1966. In this paper, in order to prevent the lateral buckling in testing a specimen constructed of the same two welded steel trusses, adapted the T-structural shape for their chord members, the steel tube for their web members and the eccentric panel points to make the construction of their panel points as simple as possible, was tested to find their strength and rigidity in the elastic and plastic behaviors. And the results of this test are discussed in comparison with the results of the elastic and plastic theoretical analysis, in which the second stresses for the welded steel trusses are considered and the plastic hinge theorem based on several assumptions is applied. The results are as follows. 1) The yield load of the specimen in this test was nearly 23 tons and for larger loads than the yield one its rigidity was observed to decrease remarkably. And the above mentioned elastic and plastic behaviors of the specimen were found to nearly satisfy the results of this theoretical analysis. Especially the elastic and plastic behaviors of the specimen in the process of its load becoming the yield one were sufficiently explained by this theoretical anailsis. And the yield load of the specimen, owing to the plastic hinges formed in its web members and the yielding of its lower chord member due to the tensil axial force and bending moment, was found to correspond to the limited load in which the specimen should lost most of the organization of the welded steel trusses and its upper chord member should begin to act as a beam. However, the rigidity of the specimen for larger loads than the yield one was found to become larger than that of this theoretical analysis. 2) The dameges to the panel points of the specimen could not be observed until its breaking load due to the buckling of its compressive web member.View full abstractDownload PDF (984K) -
MAKOTO ITO, [in Japanese], [in Japanese], [in Japanese]Article type: Article
1968Volume 154 Pages 47-52,76-77
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSThe number of physiological test in hospital is increasing. The information as to the use of physiological test room is needed to determine its location and size. This paper reports the number of in-and out-patients receiving each test, that is electrocardiograph, electroencephalograph, electromyograph, basal metabolism ratio, and respiratory function. Nine hospitals were chosen for investigation. Some of the results of the studies are as follows : 1) It was found that the great majority of the test was held by E.C.G. and the most part of the rest was held by E.E.G. and B.M.R. 2) The proportion of the number of test between in- and out-patients in E.C.G. is nearly equal. Concerning the E.E.G. and B.M.R., the greater part of them is received by out-patients. 3) One room for each test is sufficient for the hospital having up to 200 beds. Two rooms will respectively be necessary for E.C.G. and E.E.G. rests of 400-bed hospitals. In case of 600-bed hospital, three E.C.G. test rooms will be needed.View full abstractDownload PDF (944K) -
MASARU KOYASU, SYO KIMURA, MINORU NAGATAArticle type: Article
1968Volume 154 Pages 53-63,77
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSResults of the 3rd Round Robin Test in Japan have shown relatively large deviations in measured absorption coefficients. To investigate the diffuse condition in a reverberation room, which was supposed to be one of the important factors for the precision of measurements, directional diffusitivity during decay process was introduced as the index of diffusitivity for the middle and high frequency regions. From the measurements of this index, the sound fields of all rooms shown in Fig. 17 could be regarded as the same order of diffusitivity, when the total area of suspended diffusing plates in each room would reach up to 80 percent of the floor area of the room. The important factors for the disagreement of the absorption coefficients in the 3rd Round Robin test would have to be found in other items. To investigate the fluctuations of absorption coefficient related to the reverberation time measurements, experimental works were conducted in the following ways. (1) Reference decay curves were sent to 13 institutes and were read by 25 persons. (2) The absorption coefficient of identical test materials was measured by using the same instruments in 11 reverberation rooms. The reverberation time was read by only one person from the recorded decay curves. (3) To check the effect of dynamic characteristics of a high speed level recorder, decay curves were recorded by each level recorder in respective institutes. These records were read at first by only one person and then by respective persons in each institutes. From these results, it was concluded that the personal tendency for reading the decay curves and the dynamic characteristics of a high speed level recorder would play an important role for the precision of measurements of sound absorption coefficients in a reverberation room. The 4th Round Robin test, where the specifications for measurements were derived from this investigation, showed fairly good results.View full abstractDownload PDF (1597K) -
HISAYOSHI KONDOHArticle type: Article
1968Volume 154 Pages 65-73,77
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
JOURNAL FREE ACCESSIn this paper, the results of the four times investigation carried out every three years since 1955, on the land price of the plots arround the border of the projected area of the Hibari-ga-oka housing estate, and the plots of Hoya area will be reported. When some land is purchased by Japan Housing Corporation (J.H.C.) for construction of a housing eastate, the land price arround projected area usually rises higher than the area without any project arround it (like Hoya). The areas selected for study are shown in Fig. 1-5. Land prices of the plots for shop in front of the stations are usually corelated with the number of the passengers getting on and off at the station, as shown in Fig. 2-6. In our case, the land priceof the plot (y) and number of the passengere (x) are also corelated as shown in Fig. 2-7. The relation between the land price per unit square of the plot for the residence (x) and the land price for the shop (y) is shown in Fig. 3-2. *) The Hibari-ga-oka housing estate was constructed by J.H.C. in 1959. It is located in Tanashi Town in Tokyo Metropolitan Area, about 20km. far from Tokyo Central Area. The housing estate has 2694 dwelling units. Area is about 31 ha. **) Hoya is next station to the Hibari-ga-oka Station.View full abstractDownload PDF (1154K) -
Article type: Appendix
1968Volume 154 Pages App1-
Published: December 30, 1968
Released on J-STAGE: August 22, 2017
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