A softened membrane model for single-box multi-cell composite box-girders with corrugated steel webs under pure torsion

Advances in Bridge Engineering

Table 3 Prediction accuracy of the USMMT on twists at the characteristic points

Specimen	Cracking state (Concrete)			Yielding state (yielding of CSWs)			Ultimate state (Torque)
Specimen	θ_{cr, exp} (°/m)	θ_{cr, m} (°/m)	\(\frac{\theta_{cr,m}}{\theta_{cr,\mathit{\exp}}}\)	θ_{wy, exp} (°/m)	θ_{wy, m} (°/m)	\(\frac{\theta_{wy,m}}{\theta_{wy,\mathit{\exp}}}\)	θ_{u, exp} (°/m)	θ_{u, m} (°/m)	\(\frac{\theta_{u,m}}{\theta_{u,\mathit{\exp}}}\)
T-2C	0.129	0.073	0.566	0.428	0.470	1.098	1.769	2.186	1.236
T-2C-S	0.089	0.073	0.820	0.355	0.470	1.324	1.634	2.186	1.338
T-3C	0.058	0.118	2.034	0.578	0.568	0.983	1.506	2.113	1.403
T-3C-S	0.055	0.118	2.145	0.588	0.673	1.145	0.743^a	2.108	2.837
S-3	0.144	0.148	1.028	0.371	0.612	1.650	1.609	2.249	1.398
S-5	0.134	0.148	1.104	0.430	0.612	1.423	1.657	2.003	1.209
SU-5	0.127	0.148	1.165	0.558	0.612	1.097	1.603	2.182	1.361
Mean value			1.266			1.246			1.540
Standard deviation			0.554			0.215			0.534

^aDue to the limitation of test methods, this specimen may not actually reach the ultimate torque