Finite Element Analysis on Dynamic Performances and Comfort Degree of Total-prefabricated Steel Floor Slabs
Aiming at the problems of low stiffness and insufficient comfort of total-prefabricated floor slabs,a new type of existing total-prefabricated steel floor slab was optimized and designed.On the basis of bearing capacity and natural fre-quency,load-bearing structure of the floor slab was selected,and a refined finite element model of total-prefabricated steel floor slabs considering the structure was established.Finite element analysis on dynamic performances of the floor slab was carried out to research influences of special corrugated plate thickness and height of total-prefabricated steel floor slabs and floor slab span on floor slab natural frequency and acceleration response.The results show that the optimized special corrugated plate bearing capacity of total-prefabricated steel floor slabs is large and can satisfy requirements of floor slab natural frequency.Increasing special corrugated plate thickness and height of total-prefabricated steel floor slabs and reducing floor slab span can increase floor slab natural frequency,reduce peak acceleration,and effectively improve floor slab comfort degree.The special corrugated plate thickness of total-prefabricated steel floor slabs should be selected as 1.5 mm,and applicable floor span ranges of special corrugated plate height of total-prefabricated steel floor slabs commonly used are obtained.
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