Abstract
The present paper investigates the design wind loads on mullions installed at the corners of rectangular buildings based on a wind tunnel experiment using building models with various side ratios and aspect ratios. Because the mullion supports corner curtain walls, it is subjected to two mutually orthogonal wind forces at the same time. Building Standard Law of Japan specifies positive and negative peak pressure coefficients for designing the cladding/components of buildings based on the most critical maximum and minimum peak wind pressure coefficients irrespective of wind direction. Therefore, combinations of these peak wind pressure coefficients overestimate the design wind loads on mullions. In the present paper, discussion is made of the combination of wind pressure coefficients on two adjacent walls, which predicts the maximum load effects on the mullions appropriately.
