An Improved Equation for Predicting Compressive Stress in Posttensioned Anchorage Zone

Table 2

Comparison of longitudinal stress (with a duct hole, , and ).

		FEM ()	AASHTO ()		AASHTO/FEM
			Original equation (1)	Proposed equation (4)	Original equation (1)	Proposed equation (4)
0.3	0.5	0.298	0.554	0.346	1.859	1.161
	0.6	0.243	0.554	0.289	2.280	1.189
	0.7	0.185	0.554	0.227	2.995	1.227
0.5	0.5	0.371	0.635	0.395	1.712	1.065
	0.6	0.311	0.635	0.327	2.042	1.051
	0.7	0.245	0.635	0.253	2.592	1.033
0.7	0.5	0.539	0.743	0.485 (0.538)	1.378	0.900 (0.998)
	0.6	0.482	0.743	0.402 (0.482)	1.541	0.834 (1.0)
	0.7	0.411	0.743	0.307 (0.411)	1.808	0.747 (1.0)

Adjusted by equation (6b).