Suspender Replacement Method for Long-Span Concrete-Filled Steel Tubular Arch Bridges and Cable Force Measurement Based on Frequency Method

Table 1

Suspender replacement method.

Replacement method	Schematic	Advantages	Disadvantages
Bridge deck support method		(1) Structural force is easy to analyse	(1) It is suitable only for a suspender with slight damage
		(2) Less work at high altitude	(2) Building the beret beam requires a heavy workload
Temporary pocket hanging method		(1) Stress clear	(1) It is difficult to control the internal force of the steel wire rope and elevation of bridge deck
		(2) Less construction equipment	(2) High technical difficulty
		(3) Easy to operate	(3) More amount of work at a height
			(4) Large temporary load
Temporary suspender method		(1) Less construction equipment	(1) Need to prepare a cushion block
		(2) Clear system transformation	(2) High altitude operation is inconvenient