## 4 Results and Discussion
### Linear Static Finite Element Analysis Results
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{4}{c}{**Substructure Platform**} \\ \hline  & **Beam** & & **Suspension Bar** \\  & **Primary** & **Secondary** & **Suspension Bar** \\ \hline Size & 310 UC158 & 350 WC280 & 50 mm Rod \({}^{2}\) \\ Length (mm) & 3300 & 5500 & 13,000 \\
1.35G & 24, \(-\)27 1 & 196, \(-\)899 & 106, 0 \\
1.2G + 1.5Q & 33, \(-\)22 & 700, \(-\)966 & 819, 0 \\
1.2G + \(Q+W_{orth}\) & 60, \(-\)18 & 491, \(-\)980 & 583, 0 \\
1.2G + \(Q+W_{up}\) & 51, \(-\)18 & 500, \(-\)945 & 583, 0 \\
1.2G + \(Q+W_{down}\) & 64, \(-\)18 & 532, \(-\)990 & 584, 0 \\ \hline
**Maximum** & **64, \(-\)27** & **700, \(-\)990** & **819, 0** \\
**Axial Capacity** & **5646, \(-\)6151** & **10,028, \(-\)10,802** & **1669, \(-\)1669** \\
**Utilisation** & **0.01, 0.00** & **0.07, 0.08** & **0.49, 0.00** \\ \hline \hline \end{tabular} Notes: 1 Compressive forces are shown as negative and tensile forces as positive. 2 Subension bar employs ASI 4140 high tensile round bars with tensile strength range of 850 to 1000 MPa and available diameter from 8 mm to 690 mm.  
\end{table} 
Table 24: Analysis results of axial forces and member selection for substructure platform component (kN). \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multicolumn{4}{c}{**Substructure Platform**} \\ \hline  & **Primary Beam** & & **Secondary Beam** \\ \hline Size & 310 UC158 & & 350 WC280 \\ Length (mm) & 3300 & & 5500 \\ Axis & X & Y & X & Y \\
1.35G & 70 & 25 & 125 & 23 \\
1.2G + 1.5Q & 63 & 27 & 428 & 22 \\
1.2G + \(Q+W_{orth}\) & 126 & 34 & 328 & 33 \\
1.2G + \(Q+W_{up}\) & 107 & 39 & 328 & 28 \\
1.2G + \(Q+W_{down}\) & 128 & 34 & 330 & 31 \\ \hline
**[PERSON], [PERSON], and [PERSON] [28] suggested that the deflection limit for an MSS design for construction should not exceed L/400, where L is the length of the bridge span. In AS 5100.2: 2017, the value of deflection should be less than L/600 [89]. Figure 48: Deflections of the substructure platform component under three SLS load cases: (**a**) orthogonal; (**b**) 45 degrees upward; (**c**) 45 degrees downward. Figure 49: Deflections of the OMSS under three SLS load cases: (**a**) orthogonal; (**b**) 45 degrees upward; (**c**) 45 degrees downward. \begin{table}
\begin{tabular}{c c} \hline \hline  & **Girder Truss Modified Member** \\ \hline Size & 400 WC303 \\ Length (mm) & 4854 \\
1.35G & \(0,-5760\) \\
1.2G + 1.5Q & \(0,-12,128\) \\
1.2G + Q + \(W_{orth}\) & \(0,-9625\) \\
1.2G + Q + \(W_{up}\) & \(0,-9650\) \\
1.2G + Q + \(W_{down}\) & \(0,-9786\) \\ \hline
**Maximum** & **0, \(-12,128\)** \\
**Axial Capacity** & **10,843, \(-12,166\)** \\
**Utilisation** & **0.00, 0.99** \\ \hline \hline \end{tabular} Note: Compressive forces are shown as negative and tensile forces as positive.  
\begin{tabular}{c} \hline \hline Bell Disp: (DZ) (mm) \\ Max = 4.39426 [Bm:114] \\
80.8379 \\ -166.074 \\
251.308 \\ Min = -336.542 [Bm:444] \\ \hline \hline \end{tabular}
\end{table} 
Table 27: Analysis results of axial forces and member selection for girder truss modified member component (kN). Figure 48 on the next page shows that the maximum deflection of the platform component of the equipment under the three SLS load cases with wind loads in the orthogonal, 45-degree upward, and 45-degree downward directions are 109.6 mm, 105.3 mm, and 107.6 mm, respectively. For a full-length 110 m bridge deck, these deformations are all less than L/750, meeting the recommended requirement of L/400. Controlling the deformation of the construction platform is crucial in the BCE design, as it directly affects the construction quality of the bridge superstructure. With the application of an Organic Prestressing System (OPS), the mid-span deflection of the MSS's main girder can remain under L/1000 and further minimises the deflections on the construction platform [24]. Figure 49 illustrates the deformation of the entire structure under the three SLS load cases. The maximum deflections in the three cases are 336.5 mm, 329.6 mm, and 338.2 mm, respectively.