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| 2020 論文集
1. 特 集：環境工学および耐風工学分野における建築物の内圧の評価における課題 PLAを用いた建物内外圧に関する一連の研究 今 野大輔・植松 康 日 本風工学会論文集，第45巻第2号 （通号第163号），pp.122-125，2020.4 A Series of Studies on Internal and External Wind Pressures using Pressure Loading Actuators (PLAs) Daisuke KONNO, Yasushi UEMATSU, Eri Gavanski Journal of Wind Engineering, JAWE,Vol.45, No.2(No.163), 2020.4
2. 非 定常空気力に基づく大スパン屋根の空力安定性評価 高 舘祐貴，植松 康 日 本風工学会論文集，第45巻 第2号 （通号第163号），pp.42-53，2020.4 Discussion of Aerodynamic Stability of Long-Span Roofs based on Unsteady Aerodynamic Forces Yuki TAKADATE, Yasushi UEMATSU Journal of Wind Engineering, JAWE Vol.45, No.2 (No.163), pp. 42-53, 2020.4
SUMMARY: Aerodynamic stability of long-span roofs is investigated on the basis of computational fluid dynamics (CFD) with a large eddy simulation (LES). A forced vibration test is performed to obtain the unsteady aerodynamic forces for the first anti-symmetric mode. The CFD simulation method is first verified by comparing the results with the previous experimental results. Then, the unsteady aerodynamic forces, represented by the aerodynamic stiffness and damping coefficients, at the location of the anti-nodes of vibration as well as on the whole roof are computed for various wind velocities, vibration frequencies, and vibration amplitudes. The resonant effect and aerodynamic stability are discussed based on the results. Finally, the critical wind velocity that induces the aerodynamically unstable vibration is provided on the basis of the relation between the mass damping parameter and the non-dimensional wind velocity.
3. Dynamic Buckling of Cylindrical Storage Tanks under Fluctuating Wind Loading Jumpei YASUNAGA, Yasushi UEMATSU Thin-Walled Structures, 150 (2020), 106677, 2020.5
ABSTRACT: The present paper investigates the wind-induced buckling and vibration of cylindrical storage tanks based on wind tunnel experiments and time- history response analysis. Focus is on the effect of the vibration of tank shells on the buckling behavior. The dynamic buckling loads obtained from the experiments and the time-history response analysis are compared with the results obtained from the static buckling analysis. The effect of the inertia force generated by the vibration on the dynamic buckling behavior is found to be fairly small. Finally, the dynamic buckling loads are evaluated based on the results of the analysis for static wind loading.
4. 陸屋根に平行に設置された太陽光発電システムの風荷重とそれによる屋根葺き材の風荷重 低減効果 山 家哲生，植松 康，佐藤公亮，渡部智之 日 本建築学会技術報告集，第26巻第63号 ，pp.461-466，2020.6 Wind Loads on Photovoltaic Systems Installed Parallel to the Roof of Flat-Roofed Building and its Wind Load Reduction Effect on the Roofing System Tetsuo YAMBE, Yasushi UEMATSU, Kosuke SATO, Tomoyuki WATANABE AIJ Journal of Technology and Design, Vol. 26, No.63, pp.461-466, 2020.6
ABSTRACT: We have proposed to install photovoltaic (PV) panels parallel to the flat roof of a building with small gap between them. The gap may cause a pressure equalization effect on the PV panels, resulting in a reduction of the wind forces. In addition, the wind pressures acting on the waterproofing system will decrease too. In the present paper the wind pressures underneath the PV panels are evaluated by a numerical simulation using the unsteady Bernoulli equation together with the time history of external pressure coefficients on the roof of a building model obtained in a wind tunnel.
5. 低 層切妻鉄骨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,植松 康，佐藤公亮 日 本建築学会技術報告集，第26巻第63号 ，pp.461-466，2020.6 Wind Loads on Photovoltaic Systems Installed Parallel to the Roof of Flat-Roofed Building and its Wind Load Reduction Effect on the Roofing System Tetsuo YAMBE, Yasushi UEMATSU, Kosuke SATO, Tomoyuki WATANABE AIJ Journal of Technology and Design, Vol. 26, No.63, pp.561-566, 2020.6
ABSTRACT: The present paper discusses the wind pressure coefficients for the main wind force resisting systems of low-rise gable-roofed steel buildings, based on a wind tunnel experiment and a two-dimensional frame analysis. Focus is on the bending moments involved in the members as the load effect. The most critical condition occurs on the windward frame in a diagonal wind. The largest bending moment was compared with that predicted from the wind pressure coefficients specified in the Japanese building standards. Finally, more reasonable wind pressure coefficients for designing these structures are proposed based on the LRC method.
6. Wind Loads on Roofing System and Photovoltaic System Installed Parallel to Flat Roof Tetsuo YAMBE, Yasushi UEMATSU, Kosuke SATO Proceedings of International Structural Engineering and Construction Holistic Overview of Structural Design and Construction, August 2020, 7(1), (2020), STR- 39, ISEC Press, 2020.8
ABSTRACT: Mechanically-attached waterproofing system has become popular in Japan. Being vulnerable to wind actions, especially to suctions, this roofing system is often damaged by strong winds. Similarly, photovoltaic (PV) systems installed on flat roofs are often damaged by strong winds, because the PV panels are subjected to large wind forces in an adverse wind. In order to reduce such damage to both systems, the authors propose to install the PV panels parallel to the flat roof with gaps between them, which may reduce the net wind forces on the PV panels due to the effect of pressure equalization. In addition, the wind pressures acting on the waterproofing system will decrease significantly. The present paper investigates the validity of the above-mentioned idea. The wind pressures underneath the PV panels, called ‘layer pressures’, are evaluated by a numerical simulation using the unsteady Bernoulli equation together with the time history of external pressures measured at many locations on the rooftop of a flat-roofed building model in a turbulent boundary layer. The results clearly indicate a significant reduction of wind forces acting on the PV panels as well as on the waterproofing system. The use of PV panels for reducing the wind pressures on waterproofing system is quite effective to the corner region of the roof, where very large suctions are induced in a diagonal wind.
7. Design Wind Pressure Coefficients for Low-Rise Gable-Roofed Steel Buildings Seiya GUNJI, Kosuke SATO, Yasushi UEMATSU Proceedings of International Structural Engineering and Construction Holistic Overview of Structural Design and Construction, August 2020, 7(1), (2020), STR- 40, ISEC Press, 2020.8
ABSTRACT: The present paper discusses the wind pressure coefficients for the main wind force resisting systems of low-rise gable-roofed steel buildings, based on a wind tunnel experiment and a two-dimensional frame analysis. The wind pressure coefficients should be determined so that they reproduce the maximum load effects. Here, focus is on the bending moments involved in the members as the load effects. The Load Response Correlation (LRC) method is employed for evaluating the equivalent static wind pressure coefficients. Using the time history of wind pressure coefficients, the maximum load effects were computed for all combinations of frame location and wind direction. The results indicate that the most critical condition occurs on the windward frame in a diagonal wind. The largest bending moment was compared with that predicted from the wind pressure coefficients specified in the Japanese building standards, which are based on the area-averaged mean wind pressure coefficients. Finally, more reasonable wind pressure coefficients for designing the main wind force resisting systems are proposed.
8. 立体駐車場外周部材 の外装材用風荷重に関する検討
その１ 通気性のない部材の場合 寺 﨑 浩，相原知子，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.25-26，2020.9 Study of Wind Load for cladding Attached to the Exterior of Multi-story Parking Spaces. Part 1 Case of solid Members Hiroshi TERAZAKI,Tomoko AIHARA, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 25-26, 2020.9
9. 立 体駐車場外周部材 の外装材用風荷重に関する検討
その２ 通気性のある部材の場合 相 原知子，寺﨑 浩，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.27-28，2020.9 Study of Wind Load for cladding Attached to the Exterior of Multi-story Parking Spaces. Part 2 Case of Permeable Members Tomoko AIHARA,Hiroshi TERAZAKI, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 27-28, 2020.9
10. 矩 形平面及び L 型平面を有する寄棟屋根低層建築物の屋根面風圧分布 山 家哲生，山本篤志，佐藤公亮，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.77-78，2017.8 Wind Pressures on Hip Roofs of Rectangle and L Shaped Low-Rise Buildings Tetsuo YAMBE, Atsushi YAMAMOTO, Kosuke SATO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 77-78, 2020.9
11. 実 変動風荷重載荷実験に基づく金属屋根葺き材の耐風性能に関する研究 今 野大輔，，植 松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.113-114，2020.9 Study of Wind Force Reduction of a new Steel Greenhouse by Controlling internal pressure Daisuke KONNO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 113-114, 2020.9
12. 連 棟配置された円筒形構造物に作用する津波力に関する検討 その１ : 水理模型実験
寺本尚史，亀谷裕紀，小幡昭彦，佐藤公亮，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.149-150，2020.9 Tsunami Forces Acting on Cylindrical Structures
in Various Arrangements Naofumi TERAMOTO, Hiroki KAMEYA, Akihiko OBATA, Kosuke SATO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 149-150, 2020.9
13. 連 棟配置された円筒形構造物に作用する津波力に関する検討 その２ : 数値流体解析
亀谷裕紀，寺本尚史，小幡昭彦，佐藤公亮，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.151-152，2020.9 Tsunami Forces Acting on Cylindrical Structures
in Various Arrangements Hiroki KAMEYA, Naofumi TERAMOTO, Akihiko OBATA, Kosuke SATO, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 151-152, 2020.9
14. 風 力を受ける低層鋼構造建築物柱梁溶接接合部の疲労損傷評価 その１ 風洞実験に基づく外力評価及び疲労試験計画
郡司誠矢，松本 拓，佐藤公亮，堤成一郎，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.731-732，2020.9 Evaluation of Fatigue Damage to Beam-Column
Welded Connections of Low-Rise Steel Buildings Due to Wind
Forces Seiya GUNJI, Taku MATSUMOTO, Kosuke SATO, Seiichiro TSUTSUMI, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 731-732, 2020.9
15. 風 力を受ける低層鋼構造建築物柱梁溶接接合部の疲労損傷評価 その２ き裂発生位置の局所ひずみを用いた疲労損傷評価
郡司誠矢，松本 拓，佐藤公亮，堤成一郎，植松 康 日本建築学会大会学術講演梗概集(関東)，構 造Ⅰ，pp.733-734，2020.9 Evaluation of Fatigue Damage to Beam-Column
Welded Connections of Low-Rise Steel Buildings Due to Wind
Forces Taku MATSUMOTO, Seiya GUNJI, Kosuke SATO, Seiichiro TSUTSUMI, Yasushi UEMATSU Summaries of Technical Papers of Annual Meeting Architectural Institute of Japan, Structure I, pp. 733-734, 2020.9
16. Characteristics of Local Wind Forces on the Edges of Signboards Installed on the Rooftops of Buildings Yuka MASUYAMA, Yasushi UEMATSU, Osamu NAKAMURA, Yasuo OKUDA Journal of Wind Engineering and Industrial Aerodynamics, Vol.206 (2020), 104299., 2020.11
ABSTRACT: Many signboards are installed on the rooftops of low- and middle-rise buildings in Japan, which are often damaged by strong winds. However, there are no specifications of wind force coefficients for such signboards in the Japanese building codes and standards. In the present study, wind tunnel experiments were conducted to collect data on wind force coefficients under various conditions, including building shapes, as well as signboard shapes and locations. The distributions of the maximum peak wind force coefficients were obtained at various wind angles. Based on the results, the variation of the maximum peak wind force coefficient with wind angle was investigated. It was found that very large wind forces occurred near the edges of the signboard at oblique wind angles ranging from 30o to 60o with respect to the outside surface of the signboard. The present study focuses on such conditions that cause large wind forces on signboards. The results indicate that the building shape signifi- cantly affects the maximum peak wind force coefficient.
付録 令和2年 度 博 士・修士学位論文及び卒業論文題目一覧
修士学位論文 郡司 誠矢 低層鉄骨造建築物の荷重効果に基づく構造骨組用外圧係数の体系的評価
中野 泰我 曲げせん断力を受ける薄板長方形中空断面部材の局部座屈耐力と座屈後耐力 山家 哲生 屋根葺き材の耐風性向上に向けた太陽光発電パネルの利用に関する研究
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