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| 2017 論文集
1. 変 動風力を受ける円筒形貯槽の動的座屈特性 安 永隼平，植松 康 日 本風工学会論文集，第43巻 第2号 (通号第155号)，pp.1-10，2018.4 Dynamic Buckling of Cylindrical Storage Tanks under Fluctuating Wind Forces Jumpei YASUNAGA, Yasushi UEMATSU Journal of Wind Engineering, JAWE, Vol.43, No.2, (No.155), pp. 1-10, 2018.4
2. 一 様流中における大スパン構造物の屋根面に作用する風圧の特性 高 舘祐貴，植松 康 日 本建築学会東北支部研究報告集構造系，第81号，pp.121-124，2018.6 Characterisitcs of
Wind Pressure on Long-Span Roofs in Uniform Flow Yuki TAKADATE, Yasushi UEMATSU Proceedings of AIJ Tohoku Chapter Architectural Reseach Meeting, No.81 pp.121-124, 2018.6
3. 変 動風力を受ける低層鋼構造建築物の高サイクル疲労損傷に関する研究 松 本拓, 植松康 日本建築学会東北支部研究報告集構造系，第81号，pp.125-126，2018.6 High Cycle Fatigue Damage to Low-Rise Steel Buildings due to Fluctuating Wind Loading Taku MATSUMOTO,
Kosuke SATO, Yasushi UEMATSU Proceedings of AIJ Tohoku Chapter Architectural Research Meeting, No.81, pp. 125-126, 2018.6
4. 園 芸用パイプハウスの風荷重による崩壊過程と 補強効果の三次元解析による検討 高橋和也，植松 康 農業施設， 第49巻第2号(通号第157号)，pp.19-27，2018.6 Collapse Process and Reinforcement Effects of Pipe-Framed Greenhouses under Wind LoadingBased on a 3-D Analysis Kazuya TAKAHASHI, Yasushi UEMATSU The Journal of the Society of Agricultural Structures, Vol.49, No.2, (Ser. No.157), pp.19-27, 2018.6
ABSTRACT: The present paper investigates the collapse process of pipe-framed greenhouses under static wind loading based on a finite element analysis in order to establish more reasonable wind resistant design of these structures. The wind direction is limited to that normal to the ridge. In the analyses, both geometric and material non-linearity are taken into account. The flow-structural interaction is also considered, because the wind-induced deformation of the structure affects the external pressure coefficient distribution on it significantly. Both 2-D and 3-D analyses are carried out. The effects of 3-D pressure distribution and reinforcement by adding members on the collapse process are made clear. The result on the collapse process is consistent with the practical damage caused by strong winds such as typhoons. The effects of various reinforcements made on the frame are discussed based on the similar analyses up to the allowable deformation limit specified in the current design guideline. The results show most effective reinforcement from the viewpoint of wind resistant design.
5. Numerical study of wind loads on buildings induced by downbursts Yumi IIDA, Yasushi UEMATSU Proceedings of the 7th International Symposium on Computational Wind Engineering (CWE2018), Seoul, Republic of Korea, June 18-22, 2018
ABSTRACT: Non-stationarity (e.g. severe moving downdraft and strong divergent outflow near the ground) causes serious damage to buildings and structures. The features of non-stationarity were reproduced experimentally by using a downburst simulator in our previous study (2015, 2017). In the experiment, the measurement area of the flow field 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. Thus, in the present study, we conduct a CFD simulation of downbursts using a large eddy simulation in order to investigate the mechanism that causes strong winds and large wind pressures on buildings. Focus is on the effects of the non-stationarity of downburst on the wind loads on buildings. The CFD simulation successfully reproduces the experimental results and clarifies the features of downburst-induced wind loads.
6. Wind loads and unsteady aerodynamic forces on a long-span membrane structure Yuki TAKADATE, Yasushi UEMATSU Proceedings of the 7th International Symposium on Computational Wind Engineering (CWE2018), Seoul, Republic of Korea, June 18-22, 2018
7. 風環境評価のための三杯型風速計と超音波型風速計による統計量の差の検討 赤星明紀，猿川 明，佐々木亮治，宮下康一,中村 修，植松 康 日本風工学会論文集， 第43巻第3号(通号第156号)，pp.91-100，2018.7 Discussion on Difference between 3 Cup and Ultrasonic Anemometers of the Obtained Statistical Values to be Used for Wind Environment Assessment Akinori AKAHOSHI, Akira SARUKAWA, Ryoji SASAKI, Koichi MIYASHITA, Osamu NAKAMURA, Yasushi UEMATSU Journal of Wind Engineering, JAWE,pp. 91-100, 2018.7
SUMMARY:
The criterion for wind environment assessment
by Wind Engineering Institute Co., Ltd. is based on the
relation between the mean wind speeds measured by 3 cup
anemometers and the surrounding condition. Recently,
ultrasonic anemometers with lower cost and higher performance
has become popular and taken place of 3 cup anemometers; 3-cup
anemometers respond to the wind speed change slowly for lower
wind speeds while they tend to over-rotate for higher wind
speeds due to the effect of inertia force. Considering this
circumstances, the present paper investigates the difference
between 3 cup anemometer and ultrasonic anemometer for the
measured values. Based on the results, we propose a correction
method for converting the measured values by 3 cup anemometers
to those by ultrasonic anemometers.
8. L 機械的固定工法による防水システムの実変動風圧下での動的挙動に関する有限要素解析 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(東北)，材 料施工， pp.1231-1232，2018.9 Positive Peak Wind Force Coefficients for L-Shaped Signboards Installed on rooftop of buildings 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. 1231-1232, 2018.9
9. 円筒形構造物に作用する津波力に関する基礎的検討 その１：水理実験概要 小幡昭彦，亀 谷裕紀，佐藤公亮，寺本尚史，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.77-78，2018.9 Fundamental Study on Tsunami Force Acting on Cylindrical Structures Part 1: Outline of Hydraulic Test Akihiko OBATA, Hiroki KAMEYA, Kosuke SATO, Naofumi TERAMOTO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 77-78, 2018.9 10. 円筒形構造物に作用する津波力に関する基礎的検討 その２：数値流体解析 亀谷裕紀， 小幡昭彦，髙舘祐貴，佐藤公亮，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.79-80，2018.9 Fundamental Study on Tsunami Force Acting on Cylindrical Structures Part 2: Computational Fluid Dynamics Hiroki KAMEYA, Akihiko OBATA, Yuki TAKADATE, Kosuke SATO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 79-80, 2018.9
11. ダウンバーストによる建物の風荷重に関する研究 その１ 建物高さの影響 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(東北)，構 造Ⅰ，pp.109-110，2018.9 Wind Loads on Low-and High-rise Buildings Induced by Downburst Part 1 Effect of Building Height Yumi IIDA, Kazunori ASANO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 107-108, 2018.9
12. ダ ウンバーストによる建物の風荷重に関する研究 その２ 建物規模の影響 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(東北)，構 造Ⅰ，pp.109-110，2018.9 Wind Loads on Low-and High-rise Buildings Induced by Downburst Part 2 Effect of Building Scale Kazunori ASANO, Yumi IIDA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 109-110, 2018.9
13. 低層住宅用テラス屋根の設 計用風力計数に関する実験 細川敬士郎，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.127-128，2018.9 Wind Force Coefficients for Terrace Roofs Affected to Low-rise Residential Houses Keijiro HOSOKAWA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 127-128, 2018.9
14. ドーム型独立上屋に作用する風力の特性に関する研究 文 礼志，山村朗丸，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.129-130，2018.9 Characteristics of Wind Forces on Domed Free Roofs Lizhi WEN, Roma YAMAMURA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 129-130, 2018.9
15. 大スパン構造物の屋根面に作用する風圧と非定常空気力 髙舘祐貴，植 松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.131-132，2018.9 The Effect of the Moving Feature of Downburst on Wind Flow field Near Ground Yumi IIDA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 131-132, 2018.9
16.
風
の乱れの影響を考慮した風環境評価指標に関する研究 その1 風・気温観測と風洞実験およびアンケート調査 植木拓也，赤星明紀，猿川 明，佐々木亮治，中村 修，宮下康一，，植 松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.139-140，2018.9 Study on Criterion for
Wind Environment Assessment Considering the Effect of
Turbulence Part 1: Overview of the Filed Measurement, Wind Tunnel Experiment and Questionnaire Survey Taluya UEKI, Akinori AKAHOSHI, Akira SARUKAWA, Ryoji SASAKI, Osamu NAKAMURA, Koichi MIYASHITA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 139-140, 2018.9
17. 風の乱れの影響を考慮した風環境評価指標に関する研究 そ の2 風・気温と風に対する印象・風害との関係 猿 川 明， 赤星明紀，植 木拓哉，佐々木亮治，中 村 修，宮 下康一，植 松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.141-142，2018.9 Study on Criterion for Wind Environment Assessment Considering the Effect of Turbulence Part 2: Dependence of Sensation to Wind and Wind-induced Damage on Wind Speed and Temerature Akira SARUKAWA, Akinori AKAHOSHI, Taluya UEKI, Ryoji SASAKI, Osamu NAKAMURA, Koichi MIYASHITA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 141-142, 2018.9
18. 風 の乱れの影響を考慮した風環境評価指標に関する研究 そ の3 新指標の提案 赤 星明紀 ， 猿川 明，植 木拓哉，佐々木亮治，中 村 修，宮 下康一，植 松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.143-144，2018.9 Study on Criterion for Wind Environment Assessment Considering the Effect of Turbulence Part 3: Proposal of a New Criterion Akinori AKAHOSHI, Akira SARUKAWA, Taluya UEKI, Ryoji SASAKI, Osamu NAKAMURA, Koichi MIYASHITA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 143-144, 2018.9
19. 建設中で屋根のない鋼製円筒形貯槽の強風による座屈とその発生速度 安永隼平，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.157-158，2018.9 Wind Induced Buckling and Its Wind Speed of Cylindrical Steel Tanks Without Roof During Their Construction Jumpei YASUNAGA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 157-158, 2018.9
20. FRP部材を用いた園芸用パイプハウスの耐風性向上可能性に関する研究 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(東北)，構 造Ⅰ，pp.159-160，2018.9 Study on Possibility of Wind Force Reduction of Pipe-framed Greenhouses Using FRP Mrmbers Tomoaki MAZAKI, Yasushi UEMATSU, Kosuke SATO Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 159-160, 2018.9
21. 変動風力を受ける平屋鋼構造建築物主要架構部の高サイクル疲労損傷 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(東北)，構 造Ⅰ，pp.161-162，2018.9 High Cycle Fatigue Damage of Low-rise Steel Buildings due to Fluctuating Wind Loading Taku MATSUMOTO, , Kosuke SATO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 161-162, 2018.9
22. L型屋上広告板に作用する負のピーク風力係数 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(東北)，構 造Ⅰ，pp.191-192，2018.9 Negative Peak Wind Force Coefficients for L-shaped Signboards Installed on rooftop of buildings Yuka MASUYAMA, Osamu NAKAMURA, Yasushi UEMATSU, Yasuo OKUDA Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 191-192, 2018.9
23. 高層建築物の外壁に設置される通気性を有する外装材の設計用ピーク風力係数の検討 相原知子，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.195-196，2018.9 Study of Design Peak Wind Force Coefficients on Permeable Members Attached to the Exterior of High-rise Buildings Tomoko AIHARA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 195-196, 2018.9
24. 連棟配置された円筒形貯槽に作用する変動風圧と動的応答特性 山本岳史，安永隼平，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.207-208，2018.9 Characteristics of Wind Pressures and Dynamic Response of Cylindrical Storage Tanks in Various Arrangements Takashi YAMAMOTO, Jumpei YASUNAGA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 207-208, 2018.9
25. 円弧型独立上屋の設計用風風荷重 植松 康，山村朗丸 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.209-210，2018.9 Design Wind Loads on Cylindrical Free Roofs Yasushi UEMATSU, Roma YAMAMURA Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 209-210, 2018.9
26. 風外力を受ける高層建物の外装材疲労損傷評価に関する研究
その5 ：疲労評価に用いる外圧の変動成分に基づいた検討 寺﨑 浩，植松 康 日本建築学会大会学術講演梗概集(東北)，構 造Ⅰ，pp.211-212，2018.9 Fatigue Damage Evaluation of High-rise Building Cladding and Components Subjected to Dynamic Wind Forces Part5 : Fluctuation
Component of Wind Pressure for Fatigue Damage Evaluation Hiroshi TERAZAKI, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 211-212, 2018.9
27. Experimental Study of Wind Loads on Domed Free Roofs Yasushi UEMATSU, Roma YAMAMURA Proceedings of the fifteen Conference of the Italian Association for Wind Engineering (IN-VENTO 2018) , Napoli, Italy, September 9-12, 2018
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 model 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. Discussion is made of the design wind force coefficients for the main wind force resisting systems, 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.
28. ダウンバーストシミュレータの試作 飯田有未，浅野和則，植松 康 日 本建築学会技術報告集，第24巻第58号，pp.941-946，2018.10 Development of a Downburst Simulator Yumi IIDA, Kazunori ASANO, Yasushi UEMATSU AIJ Journal of Technology and Design, Vol. 24, No.58, pp. 941-946, 2018.10
29. Wind Loads for Designing the Main Wind Force Resisting Systems of Cylindrical Free Roofs Yasushi UEMATSU, Roma YAMAMURA Proceedings of the 8th Environmental Effects on Buildings and People(EEBP8), Cracow, Poland, October 3-5, 2018, pp. 43-44
ABSTRACT: Wind loads on cylindrical free roofs have been investigated in a wind tunnel. The main objective of the present study is to propose appropriate wind force coefficients for designing the main wind force resisting systems of the roofs considering the dynamic load effects of turbulent winds. The rise-to-span ratio, f/B, is changed from 0.1 to 0.5. The wind tunnel models were made by using a 3D printer. Overall aerodynamic force and moment coefficients were measured by a six-component force balance. Wind force distributions along two representative arc lines on the roof were measured by differential pressure transducers. Assuming that the roof is rigid and supported by four corner columns, the axial forces induced in the columns are regarded as the most important load effect for discussing the design wind loads. Based on the results, design wind force coefficients are proposed as a function of f/B for two representative wind directions. The roof is divided into three zones, i.e. windward, central and leeward zones, and constant wind force coefficients are provided to these zones. Two load cases, which correspond to the maximum tension and compression induced in the columns, are considered.
30. Criterion for Wind Environment Assessment Considering the Effect of Turbulence Akinori AKAHOSHI, Yasushi UEMATSU Proceedings of the 8th Environmental Effects on Buildings and People(EEBP8), Cracow, Poland, October 3-5, 2018, pp. 63-64
ABSTRACT: Turbulence affects the human sensation of wind, the wind-induced damage to buildings, the values of wind speeds measured by 3-cup anemometers, etc. The wind environment assessment criterion proposed by Wind Engineering Institute Co., Ltd. is based on the relation between the mean wind speeds measured by 3-cup anemometers and the surrounding terrain condition. This criterion does not consider the influence of turbulence. Considering the significant urbanization of large cities and the change in anemometers, a new criterion of wind environment assessment that includes the effect of turbulence is required. The present study investigates such a criterion based on a wind tunnel experiment, the field measurements of wind speeds at various locations, and a questionnaire survey on wind environment that was carried out for the residents and pedestrians in Tokyo.
31. 風の乱れの影響を考慮した風環境評価指標に関する研究 赤星明紀，猿川 明，佐々木亮治，宮下康一,中村 修，植松 康 日 本風工学会論文集，第43巻第4号 （通号第157号），pp.113-130，2018.10 Fatigue Damage Evaluation of Study on Wind Environment Assessment Criterion Considering the Influence of Turbulence Akinori AKAHOSHI, Akira SARUKAWA, Ryoji SASAKI, Koichi MIYASHITA, Osamu NAKAMURA, Yasushi UEMATSU Journal of Wind Engineering, JAWE, Vol.43, No.4(No.157), pp.113-130, 2018.10
SUMMARY: Turbulence affects the human sensation of wind, the wind-induced damage to buildings. The statistical values of winds measured by 3-cup anemometers are also affected by the turbulence. For this reason, it is important to study the influence of turbulence on the wind environment assessment criterion proposed by Wind Engineering Institute Co., Ltd. several decades ago, which was based on the mean wind speeds measured by 3-cup anemometers. The present paper discusses the influences of turbulence on the criterion using the results of field observation, a wind tunnel experiment, and a questionnaire survey about the human sensation of wind that was given to the residents and pedestrians in Tokyo. Based on the results, we have proposed a new criterion for evaluating the pedestrian-level wind environment, in which the influence of turbulence is considered.
32. Wind Tunnel Study of Peak Wind Force Coefficients for Designing Cladding/Components of Gable-Roofed Open-Type Structures Yuki TAKADATE, Yasushi UEMATSU Proceedings of the 13th International Symposium on Advanced Science and Technology in Experimental Mechanics(13ISASTEM), Kaohsiung, Taiwan, Otc.30-Nov.2, 2018
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 proposed.
33. ダウンバーストによる高さの異なる建物の風荷重に関する数値解析 飯田有未，浅野和則，植松 康 第
25回風工学シンポジウム論文集，pp.253-258，2018.12 Numerical Simulation of Wind loads on Buildings with Different Heights Induced by Downburst ABSTRACT: The wind characteristics of downbursts are quite different from those of turbulent boundary layers. Non-stationarity (e.g. severe moving downdraft and 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 by using a downburst simulator: i.e. the wind speed increase that occurs when the wind hits the ground. In the experiments, however, the measurement area of flow field 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 study, we have conducted a computational fluid dynamics (CFD) simulation of downbursts using a large eddy simulation in order to investigate the mechanism that causes strong winds. Focus is on the effects of the aforementioned non-stationarity of downbursts on the wind loads on buildings. The effects of height of building are discussed.
34. 大スパン陸屋根に作用する非定常空気力と空力安定性 髙舘祐貴，植松 康 第 25回風工学シンポジウム論文集，pp.265-270，2018.12 Aerodynamic Stability and Unsteady Aerodynamic Forces on a Long-span Flat Roof
ABSTRACT: Aerodynamic stability and unsteady aerodynamic forces on a long-span flat roof are investigated based on a computational fluid dynamics (CFD) analysis with large eddy simulation (LES). First, wind pressures on a rigid flat roof are computed in smooth uniform flow and turbulent boundary layer to verify the simulation model by comparing the results with the previous experimental data. Next, a forced vibration test is carried out to measure the wind pressure distribution and unsteady aerodynamic forces on the vibrating roof, in which the roof is forced to vibrate in the first anti-symmetric mode and the amplitude and frequency of vibration are changed over a wide range. The unsteady aerodynamic force is represented by the aerodynamic stiffness and damping. The effects of vibration frequency on the pressure distribution and the characteristics of unsteady aerodynamic forces are investigated in detail. Furthermore, the critical wind velocity causing a self-excited vibration is discussed.
35. L 型屋上広告板端部に作用する正のピーク風力発生メカニズムの検討 益山 由佳，植松 康，中村 修，奥田 泰雄 第
25回風工学シンポジウム論文集，pp.265-270，2018.12 Fatigue Damage Evaluation of High-rise Building Cladding and Components Subjected to Dynamic Wind Forces
ABSTRACT: There are many signboards placed on the rooftop of buildings in downtown areas, because of the effectiveness of advertisement. The signboards are often damaged and blown off by strong winds, causing wind-born debris. Such wind-born debris may cause secondary damage to the other buildings and people. Therefore, it is important to prevent signboards from being damaged by strong winds. The signboards should be designed properly against wind loads. However, wind force coefficients for designing signboards are not specified in the ‘AIJ Recommendations for Loads on Buildings (2015)’ as well as in the Building Standard Law of Japan. Therefore, we specified the design wind force coefficients for signboards based on the maximum peak wind force coefficients irrespective of wind direction for a variety of signboard and building models in our previous paper (2016). In the present study, the results of our previous experiments are first reviewed in more detail. Focus is on the flow condition around the signboard that induces the positive (maximum) peak wind forces on the signboards. Then, we have investigated the mechanism that causes the peak wind forces on the signboard by flow visualization in a wind tunnel. Discussion is made of the relationship between peak wind forces and each geometric parameter.
36. 建 設中で屋根のない鋼製円筒形貯槽の強風による動的座屈 安永 隼平，植松 康 第 25回風工学シンポジウム論文集，pp.361-366，2018.12 Wind Induced Dynamic Buckling of Cylindrical Steel Tanks Without Roof During Their Construction
ABSTRACT: The present paper investigates the buckling behavior of cylindrical storage tanks without roof during their construction based on time history response analysis. Focus is on the buckling of tank shells caused by fluctuating wind forces accompanied by the vibrations, which is defined as “dynamic buckling” in the present paper. The characteristics of dynamic buckling are compared with those of the static buckling obtained from the buckling analysis under static wind loading. The effect of the inertial force generated by the vibration of tank shell on the dynamic buckling behavior seems fairly small. The critical load causing the dynamic buckling is found to be larger than that causing the static buckling. Quasi-static response is dominant in the buckling behavior. In addition, it is found that the buckling occurs in the elastic range. Finally, a formula for evaluating the critical loads causing dynamic buckling is proposed based on the results obtained from the FEM analysis under static wind loading. This formula provides a conservative evaluation of the practical buckling loads.
37. 園芸用パイプハウスの雪荷重による崩壊過程と補強効果の三次元解析による検討 高橋和也，植松 康 農業施設， 第49巻第4号(通号第159号)，pp.157-163，2018.12 Collapse Process and Reinforcement Effects of Pipe-Framed Greenhouses under Snow Loading Based on a 3-D Analysis Kazuya TAKAHASHI, Yasushi UEMATSU The Journal of the Society of Agricultural Structures, Vol.49, No.4, (Ser. No.159), pp.157-163, 2018.12
ABSTRACT: The present paper investigates the collapse process of pipe-framed greenhouses under snow loading based on a finite element analysis in order to establish more reasonable snow resistant design of these structures. Three snow load distribution patterns under the effects of wind and/or solar radiation are considered. In the analyses, both geometric and material non-linearity are taken into account. Furthermore, the effects of buckling and initial geometric imperfection similar to the buckling mode are also considered. Both 2-D and 3-D analyses are carried out. The effect of reinforcement by adding members on the collapse process is made clear. The result on the collapse process is consistent with the practical damage caused by heavy snowfall. The effects of various reinforcements made on the frame are discussed based on the similar analyses up to the ultimate state. The results show the effective reinforcement methods from the viewpoint of snow resistant design.
38. Design Wind Force Coefficients for the Main Wind Force Resisting Systems of Open- and Semi- open-type Framed Membrane Structures with Gable Roofs Yuki TAKADATE, Yasushi UEMATSU Journal of Wind Engineering & Industrial Aerodynamics, Vol. 184, pp. 265-276, 2019.1
39. Laboratory Study of Wind Loads on a Low-rise Building in a Downburst Using a Moving Pulsed Jet Simulator and Their Comparison with other Types of Simulators Kazunori ASANO, Yumi IIDA , Yasushi UEMATSU Journal of Wind Engineering & Industrial Aerodynamics, Vol. 184, pp. 313-320, 2019.1
40. 翼型断面を有する鉄骨ハウスの内圧制御による風荷重低減効果 金 南昔，真崎 智亮，植松 康 農業施設， 第50巻第1号(通号第160号)，pp.7-15，2019.3 Wind Load Reduction of Steel Greenhouse with Wing-like Cross Section by Controlling Internal Pressure Namseok KIM, Tomoaki MAZAKI, Yasushi UEMATSU The Journal of the Society of Agricultural Structures, Vol.50, No.1, (Ser. No.160), pp.7-15, 2019.3
付録 平成30年 度 博 士・修士学位論文及び卒業論文題目一覧
博士学位論文 飯田 有未 非定常性を考慮したダウンバーストによる建物の風荷重に関する研究 高舘 祐貴 非定常空気力特性に基づく軽量大スパン屋根の空力安定性評価
修士学位論文 浅野 和則 ダウンバーストの非定常性を考慮した風荷重評価に関する研究 杉山 進伍 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 性能評価に関する研究 細川敬士郎 低層住宅の通気工法外壁システムに作用する風荷重に及ぼす開口の影響に関す る 研究 眞﨑 智亮 FRP部材を利用し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
卒業論文 郡司 誠矢 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 中野 泰我 高層建築物の形状検討に用いるCFDの実用的な解析条件 山家 哲生 屋根置き型太陽光発電システムの風荷重評価と屋根葺き材の風荷重低減効果
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