Development of calculation procedure of directional design wind speeds with hybrid-use of typhoon simulation an full-scale measurement

建立了台风数据库，对台风年发生率、中心气压深度、移动速度、最大风速半径等重要参数进行了评估。提出了一种改进的台风模拟方法。对于模拟方法来说，成功的关键有两个。一个是台风气压场参数的统计表示，另一个是估计地面风场的准确性。在这两点上对台风模拟方法进行了改进。本研究提出了所谓的基于POD的压力模型和混合使用的观测记录和计算值。采用改进的台风风和非台风风的统计方法评估方向风速概率。根据风向风速概率计算了高层建筑的风荷载效应。根据观测记录评估了非台风风。为了确保独立性，根据改良的詹森和弗兰克方法对间隔超过2天的峰进行采样。进行这些统计分析时考虑了地面的表面粗糙度。为了评估地面粗糙度，使用多普勒声纳、风洞实验和数值模拟进行了全尺寸观测。考虑台风和非台风风的影响，计算了方向风速的超越概率。利用这些概率估算了100年一遇风荷载的等效风速和方向风速系数，并根据上述研究结果提出了方向风速的计算方法和日本地区的风速图。

A Database for typhoons was constructed, and used to evaluate important parameters such as annual occurrence rate, central pressure depth, translation speed and radius of maximum wind. An improved simulation method for typhoon was also proposed. For the simulation method, there are two keys to success. One is statistical representation of typhoon pressure field parameters, and the other is accuracy in evaluating surface wind. The typhoon simulation method proposed was improved on these two points. This research proposed the so-called POD-based pressure model and hybrid use of observed records and calculated values. Directional wind speed probabilities were evaluated using an improved method for typhoon winds and a statistical method for non-typhoon winds. Wind load effects on tall buildings were calculated on the basis of directional wind speed probabilities. Non-typhoon winds were evaluated from observed records. In order to ensure independence, peaks more than 2 days apart were sampled on the basis of the modified Jensen and Frank method. These statistical analyses were conducted taking the surface roughness of the ground into account. For evaluating the surface roughness of ground, full-scale observations were conducted using the doppler sodas, wind tunnel experiments and numerical simulations. Considering the effects of both typhoon and non-typhoon winds, the exceeding probabilities of directional wind speeds were calculated. These probabilities were used to estimate the equivalent wind speed and directional wind speed factors of 100-year-return-period wind loads were given.Consequently, considering the above studies, procedures for the calculation of directional wind speeds were proposed as well as wind speed maps for Japanese areas.