Life-Cycle Monitoring of Long-Span PSC Box Girder Bridges through Distributed Sensor Network: Strategies, Methods, and Applications

Table 4

Stress analysis of test results (upstream).

Load test	Monitored; section	Position	Total stress; (MPa)	Elastic stress; (MPa)	Theoretical; stress; (MPa)	Residual stress; (MPa)	Check; coefficient	Relative residual stress (%)
Case 1	B1	Top flange	−1.00	−0.96	−1.90	−0.04	0.51	4.26
		Bottom flange	1.64	1.5	2.60	0.14	0.58	8.53
Case 2	A1	Top flange	0.22	0.2	1.40	0.02	0.14	7.42
		Bottom flange	−1.21	−1.08	−1.50	−0.13	0.72	10.40
Case 3	Z1	Top flange	−0.56	−0.48	−0.90	−0.08	0.53	14.65
		Bottom flange	0.67	0.62	1.10	0.05	0.56	7.51
Case 4	Z2	Top flange	−2.93	−2.76	−2.90	−0.17	0.95	5.79
		Bottom flange	3.20	3.09	4.60	0.11	0.67	3.41