随机阻尼对结构抗风抗震动力响应的影响  

Effect of wind and earthquake loading on structural response with uncertain damping

作　　者：杨志勇[1] 李创第[1] 李桂青[1] 魏文晖[1] 

机构地区：[1]武汉工业大学,武汉430070

出　　处：《地震工程与工程振动》2000年第2期24-30,共7页Earthquake Engineering and Engineering Dynamics

摘　　要：本文讨论了结构系统阻尼的随机性，运用运动微分方程和二阶摄动法对具有随机阻尼的结构系统在地震荷载和风荷载作用下的动力响应进行了计算，给出随机阻尼对结构响应的影响。结果表明，随机阻尼对结构的位移、速度和加速度的影响的确存在，特别是阻尼的变异系数较大对结构的动力响应影响更为明显，应引起结构设计者的足够重视。The random characteristic of structural damping is discussed. The differential equation of motion is applied to a second-order perturbation technique. The effects of damping variability on the dynadric response of structural systems subjected to wind and earthquake loading are exaAnned. Finally, the variances of structural response are discussed with different CoV of damping. It is obviously shown that uncertain damping shouldn' t be ignored.

关 键 词：随机阻尼 结构系统 抗风 抗震 动力响应 

分 类 号：P315.9[天文地球—地震学] TU312.1[天文地球—固体地球物理学]