Optimisation of Longitudinal Seismic Energy Dissipation System for Straddle-type Monorail-Cum-Road Long-Span Cable-Stayed Bridge
Table 5
Structural response of the four longitudinal seismic energy dissipation systems.
Longitudinal seismic energy dissipation system
Longitudinal unconstrained system
Elastic cable system
Viscous damper system
Speed lock-up device system
Car + train
Displacement at the end section of the main girder (m)
0.109
0.018
0.109
0.109
Bending moment at the bottom section of the main tower (MN·m)
419.4
329.9
419.4
419.4
Temperature action
Displacement at the end section of the main girder (m)
0.243
0.240
0.243
0.243
Bending moment at the bottom section of the main tower (MN·m)
275.0
509.4
275.0
275.0
Seismic excitations
Displacement at the end section of the main girder (m)
1.033
0.634
0.473
0.202
Relative displacement of the main girder between the main bridge and the approach bridge (m)
0.635
0.230
0.153
0.157
Bending moment at the bottom section of the main tower (MN·m)
6070.3
7409.5
4379.1
6940.5
Temperature action includes a system temperature difference of 30°C, a bridge deck positive temperature difference of 14°C, a bridge deck negative temperature difference of −7°C, and a tower body temperature difference of 5°C.
