质量偏心和刚度偏心是结构偏心的两种重要形式,从单层无阻尼结构体系地震作用下的一般振动方程出发,推导得到了不同偏心形式的结构考虑地震动扭转分量时的振动方程。在此基础上,编制相应程序对典型算例进行了数值计算,分析了结构的偏心形式、偏心率、侧扭周期比、结构周期、结构尺寸以及地震动扭转分量对偏心结构扭转耦联地震响应的影响规律。分析结果表明:结构的偏心形式对结构扭转耦联响应影响较大,不可忽视,同时地震动转动分量对结构平扭耦联响应也存在一定的影响。
Mass eccentricity and stiffness eccentricity are two key forms of asymmetric structures.Based on the general dynamic equation of undamped one-floor asymmetric structure,the vibration equations considering earthquake rotational component are derived for different eccentricity forms.The influence laws of the asymmetric structure by eccentricity forms as well as eccentricity,the period ratio of translation to rotation vibration,the basic period of the structure and the torsion component of earthquakes are draw...