Comparative study on strength and strategy in reinforced concrete hollow core flat slab by calculate models

Abstract

Hollow core flat floor is a very popular solution that is widely applied to civil construction projects in Vietnam and around the world. The hollow core floor has a 3D spatial structure with a hollow core inserted between the floor occupying the concrete in the neutral zone, reducing the amount of floor but keeping the stiffness. The outstanding advantages can be mentioned of the hollow core floor such as the ability to overcome large spans, increase the ability of sound, heat insulation to save energy, reduce construction costs in line with the trend of green construction in the world. This paper aims to examine the methods of structural calculation and stress analysis of hollow core flat slab through actual case. Then, comparing the results of the calculation methods with the measured ones at the actual projects using hollow core flat slab. The finite element method of 3D modeling in commercial Etabs and Ansys software was used to simulate the stresses of the hollow core slab and the column mushroom area. The achieved results and analytical data of this study can be used as a reference for engineers.