悬挂结构地震动力反应分析计算

利用拉格朗日方程建立了核筒悬挂结构体系运动方程.考虑到大位移非线性的影响，采用Runge-Kutta方法求解体系地震动力响应时程.计算结果表明悬挂体系能明显减小楼层层间位移、速度及加速度，减震效率接近90%.核筒截面抗弯刚度对其截面内力与筒身水平位移影响最显著，截面内力随其增加而增加.吊杆长度及阻尼器的阻尼系数对截面内力的影响较小.阻尼系数对层间位移及截面内力存在优化值.楼层位移、楼层速度及加速度随阻尼系数减小单调减小.

Analysis and calculation of seismic responses for suspension structures

An exact motion equation for core-wall suspension structure systems was establish by using the Lagrange equation. Considering the effect of large displacement with nonlinearity, the seismic dynamic response time history of the system was solved by the Runge-Kutta method. Calculation results show that the system can significantly decrease the inter-storey drift, velocity and acceleration, and the seismic mitigation efficiency is approximately 90%. Sectional bending stiffness has the most significant influence on the sectional force and translational deflection, and the sectional force increases with increasing sectional bending stiffness. However, suspender length and the damp coefficient of storey dampers have little influence on the sectional force. The damp coefficient has optimum values to the inter-storey drift and sectional force. The storey drift, velocity and acceleration exhibit monotonous decrease with the damp coefficient.