【作者】 马燕红；

【导师】 关富玲；

【作者基本信息】 浙江大学 ， 结构工程， 2005， 硕士

【摘要】 膜结构属于轻柔张力结构，对风的作用非常敏感。但由于膜结构自身特殊性，至今尚没有一套成熟的抗风设计体系与之适应。风振理论的滞后与膜结构工程在世界各国的飞速发展应用之间矛盾激化，风致破坏事故层出不穷，已引起各国风工程学者的普遍重视。 膜结构风致振动的研究方法可归结为理论方法和实验研究两类，而实验研究主要借助于风洞实验。目前，膜结构风洞试验以刚性试验居多，弹性试验相对较少，且国内这方面研究主要针对鞍形、伞形等简单体型的结构形式，与实际的工程应用相差较远。本文以拟建的台州大学风雨操场脊谷式膜结构为背景，针对该结构的复杂体型，进行了缩尺模型风洞试验的实验研究，其中气弹试验在国内同类体型方面尚属首次。基于刚性试验的数据结果，文中对该结构屋盖表面的平均风压系数和脉动风压系数进行了详细的讨论，并结合屋盖体型进行相应分区，给出不同风向角下各区域的体型系数数值及建议取值，同时利用气弹模型的试验结果，阐述了风向角及风速对结构响应的影响，并对风洞试验时各索的索力变化情况进行分析，得出一些有意义的结论，以期能对同类体型膜结构的风压分布和风振特性有更好的了解。 此外，本文还针对膜结构自身特点，基于国内外风致破坏实例，对膜结构的设计提出一些意见和建议，并对其抗风研究进行了积极的探索。更多还原

【Abstract】 Membrane coverings, which are lightweight and flexible, are sensitive to wind. However, due to its special performance, to date there isn’t an accurate wind-resistance design theoretical system. The gap, between related theory and wide application, is so great that wind damage to membrane structures continues to receive growing attention from researchers and engineers.The subject of wind-induced vibration has been undergoing theoretically and experimentally. Especially reduced scale model wind tunnel test is most popular among experimental investigations. While considerable rigid wind tunnel test research has been performed to investigate wind loads on such simple somatotype fabric structures, saddle type, umbrella type and so on, relative little work has been conducted on aeroelasticity of complicate somatotype roof buildings. This thesis aims at the ridge-valley membrane structure of Taizhou University Gymnasium. Corresponding rigid and elastic reduced model wind tunnel tests were conducted. Based on the investigation data, wind pressure distributions are discussed in detail in the rigid test, such as mean, root-mean-square (RMS) values of pressure coefficients, regional shape factors and so on. Meanwhile, according to the aeroelastic test investigations, the effect of azimuth and wind velocity on structural wind-induced response and the variations of cable force are also presented. Some conclusions are drawn in the hope that the findings will help further the understanding of the behavior of same somatotype buildings under wind load.Furthermore, using some typical membrane structure examples of wind damage for reference, some special suggestions on membrane structural design and wind-resistance design are offered.更多还原