桥梁抖振响应中联合承载函数的计算

利用机翼升力面理论分析了桥梁抖振升力沿跨向的相关函数。结果显示，该相关函数大于脉动风沿跨向的相关，表明片条理论有一定的局限性，基于片条理论的联合承载函数低估了结构对风力的响应。提出了桥梁抖振响应中计算联合承载函数应采用的升力相关函数。

Joint Acceptance Function for Determining the Buffeting Response of Bridges

The span wise coherence function of the aerodynamic lifting force in the buffeting response of bridges is analyzed by using the lifting surface theory of airfoils. Result shows that the values of the coherence function are larger than those of the on coming span wise wind velocity fluctuation, and the strip assumption has limitation in some instances. Because the joint acceptance function based on the strip assumption underestimates the response of structures to the wind force, a coherence function for the aerodynamic lifting force along the span wise direction is proposed , which is fit to be used in the calculation of the joint acceptance function for the buffeting response of bridges.