Study on Dynamic Characteristics and Coupling Analysis of Long-span Curved Structures in High Winds

2019 Fiscal Year Final Research Report

• Project/Area Number: 16H06109
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Building structures/Materials
• Research Institution: Kyoto University (2019); Nagoya City University (2016-2018)
• Principal Investigator: Zhang Jingyao 京都大学, 工学研究科, 准教授 (50546736)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Keywords: 大スパン構造 / 風振動 / 渦法 / 開口部 / 内圧 / 連成

Outline of Final Research Achievements

Study on wind-induced vibration of long-span light-weight structures has a number of difficulties: the wind load is sensitive to the Reynolds number; coupled vibration of flexible envelope and internal pressures due to unexpected openings is complicated; and fluid-structure interaction analysis is of high computational costs. In this study, we developed an analytical model for analysis of coupled vibration of the structural envelope and internal pressure; moreover, we developed vortex method for fluid-structure interaction analysis; for the structure with complex shape, we explored the SfM (Structure from Motion) technique for shape measurement, and also conducted vibration tests on a real shell structure; and finally, we presented a new composite liquid damper to mitigate long-term structural vibrations of these structures.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

大スパン軽量構造の多くは、大型集客施設であり、災害時の避難所としても指定されるため、非常に重要な社会的存在でもある。また、これらの構造物は、通常の構造物より柔らかく、大変形が起こりやすいため、強風による被害は国内外でも数多く報告されている。本研究の成果により、風荷重が支配となる大スパン軽量構造に対して、低いコストと高い信頼性でパラメトリックスタディを行うことができるため、より高い経済性とより良い構造性能を有する新型大スパン構造の創生に繋がると考えられる。