## 2 Materials and Methods
### Simulation of the Walking Track and the Hanging Basket
#### 2.3.2 Finite Element Simulation of the Hanging Basket Structure Based on MIDAS/Civil
After the hanging basket model of condition 2 was established in MIDAS/Civil software, load and boundary conditions were added. The overall distortion cloud map and stress cloud map of the structure of condition 2 are shown in Figures 28 and 29, respectively. It can be seen from Figure 28 that the maximum distortion of the structure of the hanging basket under working condition 2 was at the front end point of the right main truss, and its value is 10.70 mm, which is less than 13.25 mm of the length of the rod. It can be seen from Figure 29 that the maximum stress of the structure of the hanging basket of working condition 2 was 137.1 MPa, which occurred at the position of the lower chord of the right main truss; a larger stress was generated, but the stress on the structure was less than the allowable stress of Q235 steel 175 MPa, which met the design requirements of the project. The main components of the hanging basket in working condition 2 are analyzed below. 1 Main truss  
Different from condition 1, in addition to the original five members (upper and lower chords, vertical web members, tension sloping web members and compression sloping web members) of the main truss, the telescopic beam (AE) in the lower chord extended out. Due to the movement requirements, the rear anchor point untied the two flat load beams, leaving only one anchor for anchorage, resulting in a change in the load-bearing mode of the hanging basket. The material of each component is Q235. From the finite element analysis results of Figures 30 and 31, it can be known that the maximum distortion of the front end point of the main truss is 10.70 mm, and the maximum stress is 137.1 MPa. The maximum stress and distortion analysis of each member of the main truss is shown in Figure 18:2 It can be seen from Table 7 that each member of the main truss meets the design requirements of the project. Figure 18:3 Cloud diagram of main truss structure distortion under working condition 2. Figure 18:4 Cloud diagram of main truss structure distortion under condition 2. 2. Front upper beam  
In condition 2, the distortion and stress cloud diagrams of the front upper beam are shown in Figures 32 and 33. From the figures, the maximum distortion of the front upper beam occurred at the right end of the beam, and its real distortion is 12.96 mm. The maximum stress on the upper beam is 56.7 MPa. 3. Bottom basket  
From the finite element analysis results of Figures 34 and 35, it can be seen that the maximum distortion generated in the bottom basket structure is 12.54 mm, which is located at the right end of the front lower beam, and the maximum stress is 93.36 MPa, which occurred in the rear lower beam. The structure of each part of the bottom basket, composed of the lower bottom longitudinal beam of the web plate, the lower bottom longitudinal beam of the bottom plate, and the front and rear lower transverse beams met the construction requirements. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Member Name**} & **Maximum** & **Maximum Vertical** & **Allowable** & **Allowable** \\  & **Stress** & **Distortion/mm** & **Stress/MPa** & **Distortion/mm** \\ \hline AB & 137.1 & 16.9 & 175 & 11.75 \\ CD & 118.7 & 9.9 & 175 & 13.25 \\ BD & 49.1 & 0.12 & 175 & 9.00 \\ AD & 103.0 & 7.0 & 175 & 14.91 \\ BC & 62.2 & 9.7 & 175 & 15.25 \\ AE & 114.9 & 7.1 & 175 & 11.25 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Analysis of the members of main truss under condition 2. Figure 33: Nephogram of structural distortion of the front upper beam under condition 2. 4. Suspender  
The finite element analysis results of the suspender in working condition 2 are shown in Figures 36 and 37, respectively. It can be seen from the figure that the maximum distortion of the structure occurred in the No. 5 suspender with a value of 23.18 mm, and the maximum stress occurred in the No. 1 suspender with a value of 295.4 MPa, which is less than the allowable stress of 650 MPa.