作　　者： ; ;

机构地区： 北京工业大学建筑工程学院工程抗震与结构诊治北京市重点实验室

出　　处： 《振动工程学报》 2013年第2期220-225,共6页

摘　　要： 在研究大跨轻柔楼板振动时,有必要考虑人群跳跃及落地激励对楼板安全性及舒适度的影响。将各连体轴关节角作为广义坐标,建立了四刚体等效人体模型,研究了人体跳跃及落地整个过程中的运动特性。通过求解人体角的变化,可以计算出人群跳跃及落地过程中对楼板施加的动力荷载。通过多刚体模型法和组合正弦荷载法模拟人群动力荷载,研究了有阻尼楼板的动力方程及其求解方法。分析了人群荷载作用下,具有不同结构参数的楼板的动力性能,并对楼板的舒适度进行了评价。结果表明:由组合正弦荷载法模拟的人群激励更适用于常规的楼板设计。由多刚体模型模拟的人群激励由于具有更丰富的频率,建议在大跨楼板的舒适度评价中予以考虑。 The safety and comfort under the crowd jumping and landing are necessary to be considered, especially for studying the vibrations of flexible floor with long span. An equivalent four rigid body model for human body was established by setting the joint angles of each rigid axis as the generalized coordinates, and the human dynamic characteristics in the process of jump- ing and landing were analyzed. The time-varying forces that human exert to the floor could be calculated according to the chan- ges of different joint angles. The dynamic loads of the human were simulated according to multiple rigid body method and com- binational sinusoidal loading method and the dynamic equation for damped floor and its solution were studied. The dynamic performance under crowd excitation for floors with different structural parameters was studied, and the comfort was also evalu- ated. Results show that the combinational sinusoidal loading method which simulates crowd excitation is more suitable for rou- tine floor design and the multiple rigid body method simulated the crowd excitation, owing to its abundant frequencies, can be considered when the comfort for large span floor is evaluated.

关 键 词： 楼板振动 人群激励 舒适度 刚体模型

领　　域： [建筑科学]