# Study on Shear Resistance and Structural Performance of Corrugated Steel-Concrete Composite Deck
## 2 Finite Element Simulation of the Shear Resistance of Shear Studs in Combined Decks
The load slip curves and ultimate shear capacities of the two sets of pinned members are shown in Figure 7 and Table 2.  
Figure 5: The stress, strain and displacement of shear studs for the roll-out test model (N, mm): (**a**) Mises stress of shear studs (initial loading); (**b**) Mises stress of shear studs (end of loading); (**c**) strain of shear studs (initial loading); (**d**) strain of shear studs (end of loading); (**e**) shear studs’ displacement deformation (initial loading); (**f**) shear studs’ displacement deformation (end of loading). Figure 6: The stress, strain, and displacement of corrugated steel plate for the roll-out test model (N, mm): (**a**) Mises stress for corrugated steel plate (initial loading); (**b**) Mises stress for corrugated steel plate (end of loading); (**c**) strain for corrugated steel plates (initial loading); (**d**) strain of corrugated steel plate (end of loading); (**e**) ripple plate displacement cloud (end of loading); (**f**) concrete slab displacement cloud (end of loading); (**g**) concrete damage cloud (end of loading). From the above load slip curve trend and the shear load capacity of the shear studs, the force process of the shear stud shear connection key in a corrugated steel-concrete composite deck slab carrying shear loads can be summarized in the following stages:  
1. Stage 1: when the tangential load is less than 258.4 kN with the continuous application of a vertical shear load, the structural force state of the corrugated steel-concrete composite deck is relatively stable, and the growth rate of slip is relatively slow. At this stage, the corrugated steel plate is not involved in the force, the deformation between the corrugated steel plate and the concrete is well coordinated, and there is no obvious peeling phenomenon. The longitudinal relative slip between the two at this stage is only 1.57 mm. 2. Stage 2: when the tangential external load applied exceeds 258.4 kN but is less than 287.2 kN, the relative slip between the corrugated steel plate and the concrete begins to increase dramatically at this stage, and the rate of increase is much faster than the rate of increase of the external load. At this stage, the phenomenon of peeling between the corrugated steel plate and the concrete starts to occur, and the corrugated steel plate starts to participate in the force. At the end of this stage, the longitudinal relative slip between the two reached 3.77 mm, an increase of 140% compared to the end of the previous stage. 3. Stage 3: as the tangential external load exceeds 287.2 kN and continues to increase, the growth rate of the relative slip between the corrugated steel sheet and the concrete shows signs of slowing down compared to Stage 2, but is still faster than the rate of load increase and is in a state of rapid increase. During this stage, the stress on the bending steel increases, and the transverse peeling between it and the concrete becomes more and more obvious. From a stable force, the component as a whole gradually tends to become unstable. 4. Stage 4: when the tangential external load reaches about 410 kN, the whole element already shows a state of damage. At this point, the increase in external load becomes very small, while the slip between the corrugated steel plate and the concrete continues to increase rapidly. Eventually, when the external load reaches 413.4 kN, the pins \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Components**} & **Ultimate Load** & \multicolumn{2}{c}{**Individual**} & \multirow{2}{*}{**Silp (mm)**} & **Calculated** \\  & **(kN)** & & **Load Capacity (kN)** & & **(kN/mm)** \\ \hline \hline \(\Phi\)19 shear studs & 413.4 & 103.4 & 7.8 & 370.5 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Simulation results of the launch test simulation. Figure 7: Load slip curve. are damaged by shear as they reach their ultimate strength, and the whole member loses its load-bearing capacity and may be damaged as a result.