Experimental Study on Stability of Long-Span PC Cable-Stayed Bridge during the Construction Periods

Table 1

Linear stability analysis situation of key stages.

Structure assembling state	Load cases	Constraint conditions	Linear instability of model test	Linear instability	Remarks
No. 6 segment	Dead weight, hanging basket	4# pier consolidation, tower and beam temporary consolidation	39.2	—	—
No. 14 segment			33.0
No. 18 segment			28.4
No. 23 segment			31.9	28.8
No. 27 segment			18.1	—	Closure of side span
Finished bridge state	Dead weight	4# pier consolidation, 3# pier constraint	16.8		Closure of side span and midspan, cancel temporary constraints
Finished bridge state (full bridge uniform load)	Dead weight, vehicle load		15.3	12.4