摘要
为了对楼板在人行荷载激励下的舒适度进行评价,选定了大跨度楼板在人行激励下的舒适度评价的合理标准。通过对楼板的自振频率及其在人行荷载下加速度峰值响应的计算,以金华万达广场的大跨度悬挑扶梯平台为例,采用有限元软件MIDAS建立平台模型,对其进行了动力响应分析及舒适度评价,从梁截面、阻尼比、人群密度等方面研究了其对平台舒适度的影响。实际工程算例结果表明,可通过布置大截面密肋悬臂梁来满足平台舒适度要求,阻尼对结构加速度峰值响应影响明显,结构加速度峰值响应值随人群密度增大而增大。
In order to estimate the comfort level of the slab under the excitation of walking load, the reasonable standard was selected to evaluate the comfortable level of large-span slab under the walking load. Taking large cantilever escalator platform of Jinhua Wanda Plaza for example, the platform model was set up by finite element software MIDAS, dynamic response analysis and comfort level evaluation were carried out to study the influences of beam section, damping ratio and population density on platform comfort level. The result of real project calculation case shows that arrangement of large-section cantilever waffle beams can meet the requirement of platform comfort level, damping influences the structural peak acceleration response greatly, and structural peak acceleration response increases with population density.
出处
《建筑结构》
CSCD
北大核心
2015年第6期46-49,共4页
Building Structure
关键词
舒适度评价
楼板振动
自振频率
峰值加速度
人群密度
comfort level evaluation
floor vibration
natural frequency
peak acceleration
population density
