模态加速度法在屋盖结构风致响应分析中的应用

对大跨屋盖结构应用模态加速度法新的表达式改进风致响应计算。推导了结构风致响应分析的模态加速度方法。对一平顶屋盖刚体模型进行了风洞试验，考虑到随机风荷载的空间相关性，试验中利用同步测量的脉动风压和结构模态获得随时间变化的广义力。对屋盖均方根响应进行了讨论，说明了本文所提方法的有效性。

Use of Mode-Acceleration Solution in Response Analysis of Roof Structures

The new expression of the mode-acceleration solution is employed to improve evaluations of the wind-induced response for large roof structures in this paper. The mode-acceleration solution of wind-induced responses is derived. Wind tunnel test of a rigid flat-roof model is carried out, in which the time-varying generalized force is obtained in terms of simultaneously measured fluctuating wind pressures and structural modes to consider the correlation of random wind loading. The root mean square value of the roof response is discussed which illustrates the effectiveness of the proposed approach.