Wind loading on structure (1)

[38] A study on peak external pressure coefficient of tall buildings with step on wall surface

○Masashi TOKIZAKI¹, Yuka MASUYAMA², Akihito YOSHIDA¹, Akira KATSUMURA² (1.Tokyo Polytechnic University, 2.Wind Engineering Insitute Co.,Ltd)

Keywords:Peak external pressure, step, tall building, cladding

Not only for the design of tall buildings but also for the reduction of response, corner cut, corner chamfered or a case of changing the shape of buildings are adopted for the point of view of aerodynamic superiority. Kikuchi et.al pointed out that large negative peak external pressure is possible to appear near the inside corner of set-back low rise buildings. It is necessary to take attention for facade design of steps on building surface. Peak wind pressures of corner cut or corner chamfered are given in the AIJ code, however, it cannot be applied for the combination of vertical and horizontal steps of building surface. However, systematical researches for the peak wind pressures of step for building surface has not seen. In this study, detail phenomenon of wind pressures on steps of buildings are investigated focusing of the vertical and horizontal distance of the step from building corner.