Modified PCI Multipliers for Time-Dependent Deformation of PSC Bridges

Table 9

Predictions by various methods for bridge B (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	−16.50	2.26	−37.25	2.27	−37.44	2.29	−37.71	2.36	−38.86	2.42	−39.94	2.50	−41.20
	Prestress	35.30	2.12	74.77	2.13	75.08	2.14	75.53	2.19	77.40	2.24	79.09	2.30	81.02
	Topping					−7.50	1.42	−10.65	1.83	−13.70	1.96	−14.70	2.06	−15.45
	Superimposed dead load									−2.65	2.78	−7.36	3.00	−7.95
	Total	18.80		37.52		30.14		27.17		22.18		17.10		16.42
PCI Bridge Design Manual (BDM)	Self-weight	−16.50	1.85	−30.53		−30.53				−30.53			2.40	−39.60
	Prestress	35.30	1.80	63.54		63.54				63.54			2.20	77.66
	Topping					−7.50				−7.50			2.30	−17.25
	Superimposed dead load									−2.65			3.00	−7.95
	Total	18.80		33.02		25.52				22.87				12.86
Improved PCI BDM	Self-weight	−16.50	1.96	−32.34		−32.34				−32.34			2.88	−47.52
	Prestress	35.30	1.96	69.19		69.19				69.19			2.88	101.66
	Prestress loss	−5.30	1.00	−5.30		−5.30				−5.30			2.32	−12.28
	Topping					−7.50				−7.50			2.50	−18.75
	Superimposed dead load									−2.65			2.50	−6.63
	Total	18.80		31.55		24.05				21.40				16.48
KR C-08090	Self-weight	−16.50	2.10	−34.65	2.11	−34.82	2.20	−36.30	2.40	−39.60	2.80	−46.20	3.00	−49.50
	Prestress	35.30	2.10	74.13	2.11	74.48	2.20	77.66	2.40	84.72	2.80	98.84	3.00	105.90
	Topping					−7.50	1.50	−11.25	2.20	−16.50	2.75	−20.63	3.00	−22.50
	Superimposed dead load									−2.65	2.65	−7.02	3.00	−7.95
	Total	18.80		39.48		32.17		30.11		25.97		24.99		25.95
Numerical analysis	Total	17.92		39.26		28.66		25.36		21.38		19.54		19.23