Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Table 8

Predictions by various methods for bridge A (unit: mm).

Method	Load	(1) Release	Multiplier	(2) Erection t(e)	Multiplier	(3) Topping (t(c))	Multiplier	(4) 1st random time (t1)	Multiplier	(5) Superimposed dead load (t(s))	Multiplier	(6) 2nd random time (t2)	Multiplier	(7) Final
Proposed multipliers	Self-weight	−22.30	1.76	−39.29	2.36	−52.65	2.37	−52.91	2.41	−53.64	2.45	−54.53	2.54	−56.65
	Prestress	46.10	1.71	78.87	2.20	101.30	2.21	101.71	2.23	102.84	2.26	104.20	2.33	107.34
	Topping					−8.00	1.48	−11.80	1.78	−14.27	1.92	−15.33	2.06	−16.48
	Superimposed dead load									−2.50	2.66	−6.64	3.00	−7.50
	Total	23.80		39.57		40.66		37.00		32.43		27.71		26.71
PCI Bridge Design Manual (BDM)	Self-weight	−22.30	1.85	−41.26		−41.26				−41.26			2.40	−53.52
	Prestress	46.10	1.80	82.98		82.98				82.98			2.20	101.42
	Topping					−8.00				−8.00			2.30	−18.40
	Superimposed dead load									−2.50			3.00	−7.50
	Total	23.80		41.73		33.73				31.23				22.00
Improved PCI BDM	Self-weight	−22.30	1.96	−43.71		−43.71				−43.71			2.88	−64.22
	Prestress	46.10	1.96	90.36		90.36				90.36			2.88	132.77
	Prestress loss	−6.92	1.00	−6.92		−6.92				−6.92			2.32	−16.04
	Topping					−8.00				−8.00			2.50	−20.00
	Superimposed dead load									−2.50			2.50	−6.25
	Total	23.80		39.73		31.73				29.23				26.25
KR C-08090	Self-weight	−22.30	1.50	−33.45	2.27	−50.62	2.30	−51.29	2.45	−54.64	2.65	−59.10	3.00	−66.90
	Prestress	46.10	1.50	69.15	2.27	104.65	2.30	106.03	2.45	112.95	2.65	122.17	3.00	138.30
	Topping					−8.00	1.50	−12.00	2.15	−17.20	2.50	−20.00	3.00	−24.00
	Superimposed dead load									−2.50	2.35	−5.88	3.00	−7.50
	Total	23.80		35.70		46.03		42.74		38.61		37.20		39.90
Numerical analysis	Total	23.48		32.37		34.46		32.40		29.88		28.94		29.70