抄録
The primary purpose of this study is to provide simple formulas for estimating the design wind loads for the structural frames of rectangular flat roofs considering the dynamic response to turbulent wind forces. Two types of structural systems are considered here ; that is, (i) a series of simple beams arranged in parallel, and (ii) a structurally integrated type, which acts like an elastic plate, such as space truss. The characteristics of the first modal force are investigated, using a model of the pressure field on the roof. Based on the results, the gust effect factors for estimating the design wind loads are formulated as a function of the geometric and structural parameters of the roof and the turbulence intensity of approach flow. The formulas are verified by comparing the results on the load effects predicted by the formulas with those computed by using the experimental results for the modal force. The results of this study will be used for updating the specifications of roof wind loads in the AIJ Recommendations for Loads on Buildings.
