2019 論文集
 

 

1.      通気工法を用いた外壁システムの風荷重評価に関する研究

渡 部 慶,植松 康

日本風工学会論文集,第44巻第2号(通号第159号)pp.23-322019.4

Evaluation of Wind Loads on Ventilated Exterior Wall Systems

Kei WATANABE, Yasushi UEMATSU

Journal of Wind Engineering, JAWE, Vol.44, pp.23-32, 2019.4

 

2.      Experimental Study of Wind Loads on Domed Free Roofs

Yasushi UEMATSU, Roma YAMAMURA

Proceedings of the XV Conference of the Italian Association for Wind Engineering, IN-NENO 2018, Lecture Note in Civil Engineering, 27 (2019) , Springer (Ed: Francesco Ricciardelli, Alberto Maria Avossa), pp. 716-729, 2019.

 

ABSTRACT: Design wind loads on domed free roofs have been investigated in a wind tunnel. Wind pressure distributions both on the top and bottom surfaces of the roof models were measured. The rise-to-span ratio, f/D, was varied from 0.1 to 0.4. First, the effect of the Reynolds number on the pressure distribution is examined. Then, the effects of f/D on the wind pressures and forces are made clear. The wind force coefficients for designing the main wind force resisting systems are proposed, in which focus is on the axial forces induced in the columns supporting the roof as the most important load effect, assuming that the roof is rigid and supported by four columns. Finally, the peak wind force coefficients for the design of cladding/components are proposed based on the maximum and minimum peak wind force coefficients irrespective of wind direction.

 

3.     風圧の空間的・時間的変動特性を考慮した機械的固定工法防水システムの耐風性能評価手 法の開発

杉山進伍,植松 康,佐藤公亮,臼倉拓人,小野克也

日 本建築学会技術報告集,第25巻第60pp.585-5892019.6

Development of a Wind Resistance Performance Test Method for Mechanically- Attached Waterproofing Systems Considering the Time- Space Correlation of Wind Pressures

Shingo SUGIYAMA, Yasushi UEMATSU, Kosuke SATO, Takuto USUKURA, Katsuya ONO

AIJ Journal of Technology and Design, Vol.25 No.60, pp. 585-589, 2019.6

 

SUMMARY: A wind resistant performance test method for mechanically-attached waterproofing systems has been developed using three pressure loading actuators (PLAs). The chamber to which specimen is attached is divided into three rooms. The PLAs generates fluctuating wind pressures in the rooms separately using the time history of wind pressures measured at different points on the building model in a wind tunnel. The test results are consistent with those of full-scale measurements performed on a test building. Furthermore, the dynamic response of the roofing system is simulated by a finite element method. The result of the analysis is consistent with the experimental results.

 

4.       Criterion for Wind Environment Assessment with Consideration to the Effect of Turbulence

Akinori AKAHOSHI, Yasushi UEMATSU

Technical Transactions, Civil Engineering, Vol.116(7) (2019), pp.5-22, 2019.7

 

ABSTRACT: Turbulence affects the human perception of wind, the wind-induced damage to buildings, the val-ues of wind speeds measured by 3-cup anemometers, and so on. The wind environment assessment criterion proposed by the Wind Engineering Institute Co., Ltd. is based on the relationship between the mean wind speeds measured by 3-cup anemometers and the condition of surrounding terrain. This criterion does not consider the influence of turbulence. Considering the significant urbanization of large cities and the change in anemometers used for wind speed measurements, a new criterion of wind environment assessment that considers the effect of turbulence is required. The present study discusses such a criterion based on a wind tunnel experiment, the observation at various locations, and a questionnaire survey on the wind environment that was conducted with for the residents and pedestrians in Tokyo.

 

5.      Wind Loads for Designing the Main Wind-Force Resisting Systems of Cylindrical Free- Standing Canopy Roofs

Yasushi UEMATSU, Roma YAMAMURA

Technical Transactions, Civil Engineering, Vol.116(7) (2019), pp. 125-143, 2019.7

 

ABSTRACT: Wind loads on cylindrical free-standing canopy roofs were investigated in a wind tunnel. First, the overall aerodynamic forces and moments were measured using a force balance. The distributions of net wind pressures provided by the difference between wind pressures on the top and bottom surfaces of the roof were then measured along two representative arc lines. Based on the results, the net wind-pressure coefficients for designing such roofs are proposed as a function of the rise-to-span ratio for two representative wind directions: one perpendicular to the eaves, the other inclined at an angle of 45° to the eaves. The roof is divided into three zones and constant net wind-pressure coefficients are specified for these zones. Two load cases providing the maximum tension and compression in the columns supporting the roof are considered as the most important load effect for discussing the design wind loads.

 

6.      Numerical Study of Wind Loads on Buildings Induced by Downbursts

Yumi IIDA, Yasushi UEMATSU

Journal of Wind Engineering and Industrial Aerodynamics, Vol.191 (2019), pp.103- 116, 2019.8

 

ABSTRACT: The wind characteristics of downbursts are quite different from those of turbulent boundary layers. Non-stationarity (e.g., a severe moving downdraft and a strong divergent outflow near the ground) causes severe damage to buildings and structures. In our previous study, the following features of non-stationarity were experimentally reproduced using a downburst simulator: wind speed increase that occurs when the wind hits the ground, wind speed increase resulting from the movement of a downdraft accompanied by that of parent clouds, and wind speed increase caused by a combination of these phenomena. In the experiments, the measurement area of the flow fields and the points of pressure measurements on a building model were so limited that detailed information on the flow and pressure fields could not be obtained. Therefore, in the present, we conduct a computational fluid dynamics (CFD) simulation of downbursts using a large eddy simulation to investigate the mechanism that causes strong winds. We focus on the effects of the aforementioned non-stationarity of downbursts on the wind loads on buildings. The CFD simulation successfully reproduces the experimental results and clarifies the features of downburst-induced wind loads.

 

7.      風圧の空間的・時間的変動特性を考慮した機械的固定工法防水システムの耐風試験法に関する検討

杉山進伍,植松 康,臼倉拓人,小野克也,佐藤公亮

日本建築学会大会学術講演梗概集(北陸)材 料施工,pp.935-9362019.9

Development of a Wind Resistance Test Method for Mechanically-Attached Waterproofing Systems Considering the Time-Space Correction of Wind Pressures

Shingo SUGIYAMA, Yasushi UEMATSU, Takuto USUKURA, Katsuya ONO, Kosuke SATO

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Material and Contraction, pp. 935-936, 2019.9

 

8.      円筒形構造物に作用 する津波による波圧力の分布に関する検討

亀 谷裕紀,佐藤公亮,小幡昭彦,植松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.83-842019.9

Study on Distribution of Wave Pressure by Tsunami Force Acting on Cylindrical Structures

Hiroki KAMEYA, Kosuke SATO, Akihiko OBATA, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 83-84, 2019.9

 

9.      ダウンバーストが規模の異 なる建物の風荷重に与える影響に関する研究

浅野和則,飯田有未,植 松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.95-962019.9

Wind Loads on a Different Scale Building by a Moving Downburst A

Kazunori ASANO, Yumi IIDA, Yasushi Uematsu

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 95-96,

2019.9

10.   低層切妻鉄骨構造建築物の構造骨組用外圧係数の荷重効果に基づく検討

郡司誠矢,松本 拓,佐藤公亮,植松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.109-1102019.9

Investigation of External Wind Pressure Coefficients for the Main Wind Force Resisting             Systems of Low-Rise Steel Structures with Gable Roofs Based on the Load Effects

Seiya GUNJI, Taku MATSUMOTO, Kosuke SATO, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 109-110,

2019.9

 

11.   屋根に平行に設置された太陽光発電システムの風荷重評価とそれによる屋根葺き材の風荷重低減効果 その 1 : 研究の概要と風洞実験

山 家哲生,渡部智之,佐藤公亮植 松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.113-1142019.9

Wind Loads on Photovoltaic Systems Installed Parallel to the Building’s Roof and its Wind Load Reduction Effect on the Roofing System Part 1: Outline of the Study and Wind Tunnel Experiment

Tetsuo YAMBE, Tomoyuki WATANABE, Kosuke SATO, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 113-114,

2019.9

 

12.   屋 根に平行に設置された太陽光発電システムの風荷重評価とそれによる屋根葺き材の 風荷重低減効果 その 2 : 層内圧シミュレーション

渡部智之,山家哲生,佐藤公亮,植松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.115-1162019.9

Wind Loads on Photovoltaic Systems Installed Parallel to the Building’s Roof and its Wind Load Reduction Effect on the Roofing System Part2: Layer Internal Pressure Simulation

Tetsuo YAMBE, Tomoyuki WATANABE, Kosuke SATO, YasushiUematsu

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 115-116,

2019.9

 

13.   FRP 部材を用いた園芸用プラスチックハウスの耐風・耐雪性能に関する研究

松本 拓,真崎智亮,植松 康,佐藤公亮

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.119-1202019.9

Study on Wind and Snow Resistance of Pipe-Framed Greenhouses Constructed of FRP Members

Taku MATSUMOTO, omoaki MAZAKI, Yasushi UEMATSU, Kosuke SATO

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 119-120,

2019.9

 

14.   高 層建築物の初期形状検討に用いる CFD の実用的なメッシュ分割

中野泰我,植松 康,舘祐貴

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.123-1242019.9

Practical Condition of CFD Simulation for Evaluating Wind Loads on High-Rise Buildings

Taiga NAKANO, Yasushi UEMATSU, Yuki TAKADATE

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 123-124,

2019.9

 

15.   空力減衰に基づく大スパン屋根の空力安定性評価

舘祐貴植 松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.131-1322019.9

Aerodynamic Stability on Long-Span Roofs Based on the Aerodynamic Damping

Yuki TAKADATE, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 131-132,

2019.9

 

16.   I 型および L 型の屋上広告板端部に作用する正のピーク風力と建築物形状の関係

益山由佳,中村 修,植松  康,奥田泰雄

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.147-1482019.9

Relationship between Positive Peak Wind Force Acting on the Edge of I-Shaped and L-Shaped Signboards Installed on Rooftop Building and Building Shape

Yuka MASUYAMA, Osamu NAKAMURA, Yasushi UEMATSU, Yasuo OKUDA

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 147-148,

2019.9

 

17.   超 中層建築物の外壁に設置される通気性を有する外装材のピーク風力係数

相原知子,植 松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.149-1502019.9

Study of Peak Wind Force Coefficients on Permeable Members Attached to the Exterior of Medium-Rise Buildings

Akinori Tomoko AIHARA, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 149-150,

2019.9

 

18.   矩形陸屋根建築物に取り付く吊大庇の荷重効果に基づく風力係数

佐藤公亮,文 礼志,植松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.151-1522019.9

Wind Force Coefficients Based on Load Effects of Hung Large Canopies Attached to Rectangular Buildings with Flat Roofs

Kosuke SATO, Lizhi WEN, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 151-152,

2019.9

 

19.   ダウンバーストによる建物の風力に関する研究

飯 田有未,浅野和則,植松 康

日本建築学会大会学術講演梗概集(北陸)構 造T,pp.159-1602019.9

Wind Force on Buildings Induced by Downburst

Yumi IIDA, Kazunori ASANO, Yasushi UEMATSU

Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 159-160,

2019.9

 

20.   Steady and Unsteady Aerodynamic Forces on a Long-Span Membrane Structure

Yuki TAKADATE, Yasushi UEMATSU

Journal of Wind Engineering and Industrial Aerodynamics, Vol.193 (2019), 103946, 2019.10

 

ABSTRACT: This paper reports the steady and unsteady (motion-induced) aerodynamic forces on long-span roofs based on computational fluid dynamics (CFD) analysis with a large eddy simulation (LES). Three types of roofs, i.e., flat, cylindrical, and suspended roofs, are tested. First, the wind pressures on a rigid flat roof in a smooth uniform flow and a turbulent boundary layer are computed. The computational model and method are verified by comparing the obtained wind pressure distributions on the roofs with previous experimental results. Next, a forced vibration test is performed to understand not only the wind pressures on and the flow around the vibrating roof but also the unsteady aerodynamic forces, which are represented by the aerodynamic stiffness and damping. In the test, the roof is forced to vibrate in the first antisymmetric mode. The effects of vibration frequency on the pressure distribution and unsteady aerodynamic forces are investigated. On the basis of the results, the stability of the roofs is discussed. Furthermore, the dynamic response of a flat roof is analyzed considering the fluid–structure interaction (FSI) to investigate the vibration mechanism of the roof in more detail.

 

21.   Investigation of Aerodynamic Stability of a Long-span Flat Roof based on Wind Tunnel Experiment and FSI Simulation with Free-vibration Technique

Yuki TAKADATE, Yasushi UEMATSU

14th International Symposium on Advanced Science and Technology in Experimental Mechanics, 1-4 November, 2019, Tsukuba, Japan, 2019.11

 

ABSTRACT: The present paper discusses the wind-induced vibration of a long-span flat roof on the basis of a wind tunnel experiment and a fluid-structure interaction (FSI) simulation with free-vibration technique. The experiment and simulation were carried out in a smooth uniform flow and a turbulent boundary layer to assess the effect of turbulence on the dynamic response. The variation of mean and standard deviation displacements of the roof was obtained by changing the wind velocity. In the experiment, the similarly between the practical membrane structure at full scale and the model used in the experiment was not necessarily satisfied because of the limitation of experimental condition. Then, an FSI simulation which couples a computational fluid dynamics (CFD) analysis for fluid and a finite element analysis for structure is carried out to examine the practical behavior of the long-span roof in wind. In addition, the modes and eigenvalues of free-vibration at each wind velocity are detected by using a proper orthogonal decomposition analysis. These results indicate that the static deformation is one of the most important factors for assessing the vibration mechanism of long-span roofs.

 

22.   Investigation of Aerodynamic Stability of a Long-span Flat Roof based on Wind Tunnel Experiment and FSI Simulation with Free-vibration Technique

Yuki TAKADATE, Yasushi UEMATSU

Advanced Experimental Mechanics, Vol.4 (2019), pp.192-197, 2019.12

 

ABSTRACT: The present paper discusses the peak wind force coefficients for designing the claddings and its immediately supporting structures of open type membrane structures based on a wind tunnel experiment. Three types of gable-end configurations, i.e. enclosed, open and partially-enclosed (semi-open) types are tested. The wind tunnel experiment is carried out in two kinds of turbulent boundary layers corresponding to open-country and urban terrains. The wind pressures are measured simultaneously at many points both on the external and internal surfaces. First, the distributions of mean wind force coefficients are investigated to understand the characteristics of the wind forces, focusing on the effects of gable wall configuration. Then, the maximum and minimum peak wind force coefficients irrespective of wind direction are examined. Furthermore, the characteristics of internal pressures on open and semi-open type structures are investigated. Based on the results, an estimation method for evaluating the peak wind force coefficients for open and semi-open type structures is propose

 

23.   スパン・軒高比が陸屋根の非定常空気力に及ぼす影響

舘祐貴植 松 康

膜構造研究論文集,第33pp.1-112020.3

Unsteady Aerodynamic Forces on Long-span Flat Roofs with Various Span to Eaves-height Ratios

Yuki TAKADATE, Yasushi UEMATSU

Research Paper on Membrane Structures, No.33, pp. 1-112020.3

 

SYNOPSIS: Aerodynamic stability of long-span flat roofs has been investigated on the basis of the computational fluid dynamics with a large eddy simulation. The span to eaves-height ratio (L/H) of the building was changed from 3 to 9 to understand the effect of the separated flow and the separation bubble, which are strongly affected by L/H, on the unsteady aerodynamic forces acting on the vibrating roof in the first anti-symmetric mode. First, the distributions of mean and RMS fluctuating wind pressure coefficients on the rigid and vibrating roofs were examined, in which the vibration mode was assumed to be the first anti- symmetric mode. The results on the mean and fluctuating wind pressure distributions on the rigid roofs indicate that the eaves height is one of the most important factors to evaluate the wind pressure distributions. It is also found that the distributions of RMS fluctuating wind pressure coefficients on the vibrating roof is characterized by the vibration mode. To understand the characteristics of fluctuating wind pressures in detail, the power spectral densities and phase differences of fluctuating wind pressures were examined. The general shape of the power spectral densities for the vibrating roof was found to be similar to that for the rigid roof. The results indicate that the fluctuating component of wind pressures at the forced vibration frequency is related to the roof’s vibration significantly. However, the roof’s vibration affects the phase differences of fluctuating wind pressures only a little. The unsteady aerodynamic forces at the location of anti-nodes of vibration mode are affected by the separation bubble generated by the flow separation from the leading edge of the roof. However, the generalized unsteady aerodynamic forces are minutely affected by L/H. Finally, a formula for the critical wind velocity that induces the aerodynamically unstable vibration is proposed on the basis of the generalized aerodynamic damping. The critical reduced wind velocity, defined by the velocity at the eaves height, the span and the natural frequency of the first anti- symmetric mode, are 1.27 and 1.47 for the uniform flow and the turbulent boundary layer, respectively.

 

24.   円弧型独立上屋に作用する風圧の時間的・空間的変動特性に関する研究

文 礼志植 松 康

膜構造研究論文集,第33pp.39-522020.3

Characteristics of Wind Pressures and Wind Forces on a Cylindrical Free Roof Focusing on the Spatial and Temporal Variations

Lizhi WEN, Yasushi UEMATSU

Research Paper on Membrane Structures, No.33, pp. 39-522020.3

 

SYNOPSIS: The present study investigates the characteristics of wind pressures and wind forces acting on a cylindrical free roof based on a wind tunnel experiment as well as on a CFD simulation using LES, focusing on the spatial and temporal variations. The rise/span ratio (f/B) and the length/span ratio (W/B) of the roof were changed from 0.1 to 0.4 and from 1 to 3, respectively. In the wind tunnel experiment the wind pressure distributions were measured along only two lines because of a limitation of model making. The effects of f/B and W/B on the distributions of wind pressure coefficient and wind force coefficient, provided by the difference between wind pressures on the top and bottom surfaces, were made clear. A CFD simulation with LES was also carried out in order to investigate the spatial and temporal variations of wind pressures and wind forces over the whole roof area. The CFD model used in the simulation was first verified by comparing the results with the experimental ones. Then, the characteristics of wind pressure and force distributions were investigated. Finally, discussion was made of the peak wind force coefficients for the design of cladding/components of cylindrical free roofs, based on the experimental and numerical results.

 

 

 

 

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修士学位論文

 亀 谷 裕紀  円筒形オイルタンク群に作用する津波力および耐津波特性に関する研究

  松本  拓  風力を受ける低層鋼構造建築物柱梁溶接接合部における累積疲労損傷

 

 

卒業論文

 菅 原 淳史  正方形中空断面柱部材の新規幅厚比尺度による最大耐力・塑性変形能力評価法