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中文摘要：
为预测复杂来流条件下桥梁结构抖振内力,从概率统计的角度出发,探讨了桥梁结构设计风速条件下风致振动内力和位移之间存在的可解耦的线性关系,建立了桥梁风致振动内力和位移之间的多元线性回归模型,完成了线性回归模型的显著性检验,证实了多维线性回归模型的可靠性和工程实用性.将建立的回归模型应用到以空间多角度偏、斜风组合作用条件下桥梁风致振动内力分析中,得到了复杂来流条件下桥梁抖振内力预测分析的解决办法.多维线性回归算法的提出有助于由桥梁气弹模型风洞试验直接测量得到的位移结果向内力响应精确转换,避免了采用繁琐的斜风作用理论直接推算桥梁构件内力的不足.
英文摘要：
To predict the buffeting internal forces of bridge components under complex incoming wind,the linear transformation relations between internal force of bridge components and their deformation were discussed in probability and statistics terms.The present paper deduced the multiple linear regressive model between the internal force and its deformation.Verification analysis is also performed to make sure that the regressive model is of great significance and can be applied in the engineering.Using the regressive model,the internal forces induced by buffeting under complicated incoming wind are predicted.This methodology can directly transform the buffeting displacement of bridge under skew wind achieved from wind tunnel test into internal force of bridge components,without using the complex theory of buffeting analysis under skew wind.
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