by Steel reinforced concrete structures have superior performance and have been increasingly widely used in civil construction, bridges, tunnels and other engineering projects. When applied to nuclear power plants, steel reinforced concrete structures exhibit strong specificity in terms of stress characteristics, functional requirements, and construction. In recent years, a large number of research on the application of steel reinforced concrete in nuclear power plant engineering has been carried out both domestically and internationally, forming a relatively complete regulatory system..
In the 1990s, steel-concrete composite shear walls gradually emerged. Steel and concrete materials were combined together through bolts welded on steel plates, working together. Concrete was mainly poured on site. According to the different relative positions between steel plates and concrete slabs, it can be divided into embedded steel plate concrete composite shear walls, single-sided steel plate concrete composite shear walls, and double steel plate concrete composite shear walls. Steel concrete composite structures provide an important solution to engineering problems. The development process of composite structures is the continuous exploration of combining steel and concrete materials more reasonably and effectively to work together as a whole, so that each material is in the most suitable position to play its advantages. Composite structural technology can be applied to beam and column components to achieve better economic and technological benefits (such as steel-concrete composite beams and steel-concrete columns), while steel plate concrete composite structures can be used for walls, slabs, shells, and other components..
Steel plate concrete composite structures can be used as vertical load-bearing components or as horizontal load-bearing components. The former includes the core tube and shear walls in high-rise buildings, the safety shell and internal walls of nuclear reactors, bridge tower walls, etc; The latter includes bridge decks, tunnel roofs, safety shell domes, etc. Shear walls and other structures mainly bear in-plane pressure, bending, and shear loads, while other structures mainly bear out of plane bending and shear loads. Compared with reinforced concrete walls and slabs, steel plates (plates with tensile, compressive, and shear resistance) are used in steel-concrete composite structures to replace steel bars (wires primarily used for tensile purposes). The stress mechanisms of the two under compression, out of plane bending and other modes are similar, and similar design methods can be provided under the premise of meeting the assumption of a flat section. However, under conditions such as in plane and out of plane shear, there are more obvious differences..
In the development process of steel plate concrete structures, there are various names, such as steel plate concrete composite structures, steel shell concrete structures, and outer steel plate concrete structures..
The basic structure of steel plate concrete structure includes steel plate, concrete, and the connection between the two. Steel reinforced concrete structures can be classified into many types based on their functional use, structural form, and stress characteristics. For example, based on the relative position relationship between steel plates and concrete, they can be divided into forms such as embedded steel plates, single-sided steel plates, double-sided steel plates, etc., as shown in Figures 3 and 4..
The construction of single-sided steel plates is mostly suitable for horizontal load-bearing components, while the forms of embedded and wrapped steel plates are suitable for vertical components. It should be noted that when the concrete is exposed, steel bars need to be installed inside the concrete to ensure the ductility of the structure. The construction form of wrapping steel plates on both sides can only be filled with concrete inside without the need for steel reinforcement, which is of great value for simplifying construction. At the same time, the steel plate arranged on the outermost side can also play a maximum role in exerting stress performance.
