Dynamic Performance And Serviceability Research On Composite Slabs With Opening Under Human-induced Dynamic Loads

With the development of the level of architectural design and the construction technology,pressed steel-concrete composite slabs have been used more and more in high-rise buildings.The design of slabs needs to meet the requirements of strength and deformation at the same time, the vibration comfort should be given full consideration. At present, the engineering design of the structure of composite slabs with opening is also widely used. The vibration and comfort of slabs is taken seriously under human-induced dynamic loads. And the vibration control and study of composite slabs with opening is not perfect and comfort evaluation standards and design methods are absent. Thus, the research of this kind of slabsvibration and comfort problems has important practical significance.For the vibration and comfort problems of composite slabs with opening under human-induced dynamic loads,the main work and conclusionsin this article are listed as follows. Elevenspace model of composite slabs with opening were analyzed by finite element analysis software ETABS to studythe dynamic performance effect of open hole rate and open hole shape on the comfort of slabs. This paper analyzedeleven structure modelof slabs respectively for modal analysis and elastic time history analysis and extract the corresponding dynamic response data.Through comparison and analysis, the effect of open hole rate and open hole shape of composite slabs with opening for their dynamic characteristics was summed up.Different factors such as the open hole position, beam height, damping ratio, the support conditions, slab spanand bearing conditions were researched for the comfort of composite slabs with opening. The following conclusions:the effect of open holesizefor the vibration characteristics of slabs is far more than the effect of open hole shape. When the open hole rate is around 0.03, floor resonance occurs most easily;So the vibration need to control when the hole rate in 0.03 in the design of engineering; It is concluded that damping ratio and stiffness have a great influence on the comfort of composite slabs with opening; Differences between different standards of evaluating results.