Temperature Control Technology for Construction of Jinsha River Bridge

Table 4

Stress calculation results.

Position	Layer	Maximum principal tensile stress at heating stage				Maximum principal tensile stress at cooling stage
		Stress value (MPa)	Concrete age (d)	Allowable stress (MPa)	Safety factor	Stress value (MPa)	Concrete age (d)	Allowable stress (MPa)	Safety factor
Cap	First-layer concrete	2.02	2.5	2.44	1.21	1.33	10	3.16	2.38
	Second-layer concrete	1.86	2.5	2.44	1.31	2.01	10	3.16	1.57
Tower base	First-layer concrete	2.29	2.5	2.71	1.18	1.77	10	3.45	1.95