Identification of realistic fluctuation velocities of wind pressure on building surfaces and modeling of long-term histograms

粘结连接用于许多技术领域，如车辆和飞机制造。此外，各种类型的胶粘剂也被用于建筑行业的附属连接。然而，对于需要基于概率理论对其承载能力进行技术证明的结构构件，粘结连接的使用还是空白。这一应用受到限制，因为存在关于长期行为的公开问题。事实上，在这方面还没有科学的证据概念可用。在粘接连接的情况下--与传统的紧固件不同--需要考虑材料行为的时间相关效应。从经济和建筑物理的角度来看，这种应用将是有利的，特别是对于立面建筑来说。为此目的所需的结构安全验证需要了解由于风荷载引起的相应的随时间变化的效应。虽然已经有了关于各种类型建筑物立面上的风压和吸力的预期平均值和极值的广泛知识，但关于压力幅值的频率(幅度集合)和压力变化率的频率(波动速度集合)的信息缺乏。目前的项目提案希望缩小这一差距，根据现有的和新的风洞数据系统地评估气动效应，并提出相应的建模建议。为了使建模尽可能逼真，它的目的是保持压力系数对其变化率的依赖性。为此，在初步调查中，对一些测点的测试数据进行了双面归类。这清楚地表明，正面压力的高系数幅值往往与低变化率有关。此外，基本上可以确认，可以从试验数据中得出峰值压力频率和压力变化率的统计模型。研究还表明，建筑物的位置对双面频率分类有很大影响，因此有必要对不同建筑物、不同流向、不同建筑物形状进行系统的研究。该提案致力于这一研究任务。

Bonded connections are used in many technical areas, such as vehicle and aircraft construction. Besides that, various types of adhesives are used in the construction industry for subordinate connections. However, the usage of bonded connection for structural components, which require technical proof of their load-bearing capacity based on probabilistic theory is missing. This application is restricted as there are open questions regarding long-term behavior. In fact, there are no scientifically based proof concepts available in this regard. In the case of glued connections - in contrast to conventional fasteners - time-dependent effects of the material behavior need to be considered. Such an application would be advantageous from an economic and building physics point of view, especially for facade construction. The structural safety verification required for this purpose requires knowledge of the corresponding time-dependent effects due to wind loading. While there is already extensive knowledge of the expected mean and extreme values of wind pressure and suction on the facade surfaces of various types of buildings – information on the frequency of the pressure amplitudes (amplitude collective) and the frequency of the pressure change rates (collective of fluctuation speeds) are missing. The present project proposal would like to close this gap and systematically evaluate the aerodynamic effects based on existing and new wind tunnel data and de-rive corresponding modeling proposals. To allow modeling that is as realistic as possible, it is aimed to preserve the dependency of pressure coefficients on their rates of change. For this reason, the test data used for some measuring points were classified in a double-sided way in preliminary investigations. It was clearly shown that the high coefficient amplitudes of the facade pressures tend to be associated with low rates of change. In addition, it was basically possible to confirm that it is possible to derive statistical models for the frequency of peak pressures and pressure change rates from test data. It has also been shown that the positioning on a building has a significant influence on the double-sided frequency classification so a systematic investigation (for different buildings, flow directions, and for different building shapes) is necessary. The proposal is dedicated to this research task.