摘要
为研究大跨楼板结构在人行激励作用下的振动舒适度,以甘肃省体育馆悬挂结构为例,借助有限元软件ANSYS,在傅里叶荷载模型的基础上,将人体等效为具有刚度-质量-阻尼的单自由度体系生物力学模型,考虑定点加载、单人行走以及人群同步等工况下行人-结构的耦合振动前后结构的加速度响应。以峰值加速度为指标评估该悬挂结构的振动舒适度,并分别利用单自由度TMD和3-DOF TMD对结构的过量振动进行控制,对比了单自由度TMD与3-DOF TMD减振效果。结果表明:对大跨楼板结构进行人致振动控制时,3自由度TMD对大跨楼板结构具有很好的控制效果。
In order to study the vibration serviceability of large-span floor under the motivation of pedestrians,, the Gansu Provincial Gymnasium is studied as an example. The finite element model of this large-span suspension structure is established using ANSYS. The biodynamic model is simulated with stiffness-mass-damping（SMD） of single degree of freedom system, which is combined with the Fourier series load model to represent a single pedestrian load. Then the combined pedestrian load is loaded in the finite element model, and the acceleration response of the fixed-point loading, single-step moving loading and moving loading of population synchronization under the conditions of considering the pedestrian-structure coupling vibration is analyzed. The serviceability of the suspension structure is evaluated by the peak acceleration as the index. A single degree of freedom TMD and 3-DOF TMD are used to control the excessive vibration of the structure, and the damping effect of the single degree of freedom TMD and 3-DOF TMD is compared. The results show that 3-DOF TMD has good effect in controlling human induced vibration of large span floor structure.
作者
朱前坤
蒲兴龙
惠晓丽
张琼
杜永峰
ZHU Qian-kun;PU Xing-long;HUI Xiao-li;ZHANG Qiong;DU Yong-feng(Lanzhou University of Technology Institute of Earthquake Protection and Disaster Mitigation,Lanzhou,Gansu 730050,China;Faculty of Infrastructure Engineering Dalian University of Technology,Dalian,Liaoning 116024,China)
出处
《工程力学》
EI
CSCD
北大核心
2018年第A01期46-52,共7页
Engineering Mechanics
基金
国家自然科学基金项目(51508257
51668042)
甘肃省高等学校科研项目(2015B-34)
