Experimental Study And Theoretical Analysis Of PK Prestressed Composite Slab

PK prestressed composite slab, whose prefabricated component is a prestressed ribbed panel and has preparative holes on its rib, is a new composite floor structure by improving the traditional prestressed composite slab. Under the construction, it uses the prefabricated component as the template; collocates the transverse imprestressed reinforcing steel bar through the rib's rectangle holes; then moulds concrete after disposing the reinforcing steel bar with the form of broken line in the slit of the slab; and finally the PK prestressed two-way composite slab is formed after the concrete achieves the intensity. This floor structure has the good advantages of integrity and crack-resistance. And with this floor structure, it is useless to use the template and bracing under the construction. So it is convenient for factory working and its applied future is very expansive. This thesis does deep research on the PK prestressed two-way composite slab, based on the researches on PK prestressed composite slab. And all the researches are as follow:1.Do the static water loading experiment on the PK prestressed composite slab. Through analyzing the distortion, strain, rigidity and crack-resistance of the experimental slab, it gets that the PK pre-stressed composite slab has the obvious advantage of two-way working performances, integrity and crack-resistance. And combining with the experimental results, this thesis analyzes the load transfer of PK prestressed composite slab.2. This thesis uses large-scale finite element software ANSYS to simulation PK prestressed composite slab experimental model load stage, and carries on the comparison with the test result; Simultaneously, this study analyzes primarily PK composite slab elastoplasticity stage working performances.3.According to the orthogonal aeolotropic board model analysis, the approximate relative pattern of rigidity rate and the angle of load assignment is founded. And union experiment analysis, the two-way approximate rigidity rate of PK prestressed composite slab is got. Applying the classic elastic plane theory on the base of this, this study has calculated the elastic calculating coefficient tables which are similar to two-way slab of the common reinforced concrete. Furthermore, the elastic design method of PK prestressed two-way composite slab is explored.4.This study also analyzes primarily the limit supporting capacity and crack-resistance of PK prestressed two-way composite slab. And it has put forward the approximate calculating method.5.By integrating with the actual project, the brief analysis of the applied advantages of PK prestressed composite slab, working performances in the using stage and the economic benefit shows that this composite slab has good capability and economic benefit, and it is worth spreading and applying this new floor structure.