The mid-span headstock was modeled as a continuous beam supported by pinned columns to ensure no moment was transferred to the pile cap beneath. As a result traditional bending moment and shear force diagrams were produced as shown in figures 7 and 8. The design actions can be seen in Table 2. Figure 7– Bending moment diagram Figure 8 Shear force diagram – Table 2: Ultimate Design Loads Ultimate Case Load / Moment Positive moment at support 7194 kNm Negative moment at mid-span 10955 kNm at support 6546 kN Reaction at column/pier load) 10778 kN Headstocks at abutments Both abutment headstocks share the same design; this was modeled as a continually supported beam, however the secant pile wall support had spring restraints to simulate the effects of bearing on soil. Due to the concentrated loads from the Super T Bridge this created a series of small bending moments and shear surrounding each Super T. Figure 9 shows a typical pile sitting beneath the transferred load, which governed the design. The design actions can be seen in Table 3.
The mid-span headstock was modeled as a continuous beam supported by pinned columns to ensure no moment was transferred to the pile cap beneath. As a result traditional bending moment and shear force diagrams were produced as shown in figures 7 and 8. The design actions can be seen in Table 2. Figure 7– Bending moment diagram Figure 8 – Shear force diagram Table 2: Ultimate Design Loads Ultimate Case Load / Moment Positive moment at support 7194 kNm Negative moment at mid-span 10955 kNm at support 6546 kN Reaction at column/pier load) 10778 kN Headstocks at abutments Both abutment headstocks share the same design; this was modeled as a continually supported beam, however the secant pile wall support had spring restraints to simulate the effects of bearing on soil. Due to the concentrated loads from the Super T Bridge this created a series of small bending moments and shear surrounding each Super T. Figure 9 shows a typical pile sitting beneath the transferred load, which governed the design. The design actions can be seen in Table 3.