Increasing Law Of Deflection And Comfort Analysis For The Honeycombed-core Hollow Floor

As a new floor type, honeycombed-core hollow floor of cast-in-situ concrete has a lot of advantages.It is economic, aesthetic, light weight, and it increases floor’s net height. Also, it is suitable for structure with large span or large space. At present, the research on the deflection change of honeycombed-core hollow floor is little, at the same time, it is lack of research on vibration comfort issues under human walking. All of these make the floor type limited in the applications. These issues are discussed on the following aspects by finite element analysis software(ABAQUS) in this thesis.Firstly, the simulation analysis is carried on honeycombed-core hollow floor with different spans, different constraints and built different sizes of honeycombed-core under a variety of uniform loads. The exploration is carried on the deflection growth law and the main factors. Meanwhile, the comparison is carried on the ability of resisting deformation of the honeycombed-core hollow floor and solid plate in the normal state.Secondly, the dynamic and time-historical analysis is carried on the honeycombedcore hollow floor with different spans under single person walking. And its natural frequency and peak acceleration are obtained. These results are compared with the comfort limited value. The results show that honeycombed-core hollow floor has good comfort in single person walking. And it has a better performance than the comfort of ribbed floor.Finally, the dynamic and time-historical analysis is carried on honeycombed-core hollow floor under the rhythmic movement, which span are 12 m × 12 m and 14.4m × 14.4m. And the natural frequency and peak acceleration of the floor with different thickness and different use of state are obtained. It shows that the comfort performance can be improved effectively by increasing the thickness of the upper and lower flange of hollow floor in a rhythmic motion. Furthermore, under the same thickness and the amount of concrete, honeycombed-core hollow floor have better comfort performance when compared to ribbed floor.