The prototype of modern reinforced concrete structure was born in Paris in 1850. Labrouste (1801~1875) successfully built the vault of St. Genevieve Library with staggered bars and concrete. Wilkinson obtained the registered patent of reinforced concrete in 1854. 1867 monineath, a French gardener, made a large flowerpot by embedding barbed wire in concrete, and obtained a patent. In this way, he built a reservoir and a bridge. Francis of the same year? Colne built the basement of the Paris Exhibition Hall with barbed wire and concrete. 1870 Satyas? White proved through experiments that iron and concrete have the same expansion-contraction ratio when they expand when heated and contract when cooled, thus ensuring the holding power between the two materials and forming an integral composite material. This experiment raised people's perceptual knowledge of this composite material to a rational level.
With the maturity of steelmaking technology, steel bars have replaced iron bars. Francois of France? Ennebic put forward the configuration system of steel bars in concrete, which made the scientific nature of reinforced concrete structure more and more understood and accepted by people. At that time, people were very enthusiastic about this new material, and made various attempts on its application in engineering, among which the more meaningful attempt was to use concrete as the floor. Up to now, no matter what materials are used for the longitudinal supporting structure and outer skin of buildings, most floors of buildings still use reinforced concrete, which may be the profound influence of concrete materials on the building system.