Study on the Technical Status of Old Concrete Truss-Arch Bridge Based on Vehicle-Bridge Interaction

Table 1

Theory and experimental strain values.

Number of measuring points	Single-stage loading	Secondary loading		Unloading
	Experimental value (με)	Experimental value (με)	Theoretical value (με)	Residual strain (με)
J1-1	21	40	30	0
J1-2	49	102	80	0
J1-3	30	84	80	1
J1-4	15	30	30	0
J2-1	13	21	27	0
J2-2	24	61	83	0
J2-3	30	70	87	0
J2-4	19	24	30	0
J3-1	20	48	30	0
J3-2	18	41	35	0
J3-3	20	42	35	0
J3-4	25	38	30	0