Seismic Response Mitigation of a Long-Span Tower Bridge with Two Types of Constraint System

Table 3

Comparison of longitudinal internal forces and displacements with different mitigation measures.

Restraint systems	Longitudinal displacement at girder end (mm)	Longitudinal displacement at tower top (mm)	Base shear in tower (kN)	Base moment in the tower (kN·m)
Floating system	1.414	1.530	4.848 × 10^4	2.538 × 10^6
ECD	0.951	1.101	5.332 × 10^4	2.533 × 10^6
VD	0.764	1.022	3.942 × 10^4	2.052 × 10^6