钢-混凝土协同式组合空腹夹层板楼盖舒适度分析

Research on Comfortableness of the Stell-Concrete Collaborative Composite Vierendeel Sandwich Plate of Floor Structure under Walking Excitation

钢-混凝土协同式组合空腹夹层板由于跨度较大,自重较轻,舒适度是评价其结构性能的主要指标。针对某筒中筒结构楼盖,考虑不同网格布置方式、有无隔墙和不同行走路线影响进行振动响应分析。分析表明,楼盖低阶振型表现为竖向振动;加速度峰值在网格为正交正放,行走路线通过低阶振型中心时最大;有隔墙时空腹夹层板的自振频率和峰值加速度要低于无隔墙时相应的自振频率和峰值加速度;为保证舒适度,建议采用正交斜放网格,考虑隔墙影响,隔墙布置尽量避免产生通过低阶振型中心的行走路线,如果不可避免,在分析时应考虑让行走路线通过低阶振型中心。

The comfortableness of the stell-concrete collaborative composite vierendeel sandwich plate of floor structure under floor vibration becomes an important index to evaluate the function of floor because of the long span,the light-weight and the low vibration frequency.the vibration of one tube in tube structure floor under different grid layouts and different walking routes were analyzed.The result shows that,the low order modes are mainly vertical vibration.The peak acceleration and vibration frequency is bigger than there＇s no partition.The peak acceleration is big when the walking route through the low order modes center.To ensure the comfortableness,it is suggested using orthogonal diagonal grid,avoiding to produce walking routes through the low order modes center when arrange partition.