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

Advances in Bridge Engineering

Table 2 Prediction accuracy of the USMMT on torques at the characteristic points

Specimen	Cracking state (Concrete)			Yielding state (yielding of CSWs)			Ultimate state (Torque)
Specimen	T_{cr, exp} (kN-m)	T_{cr, m} (kN-m)	\(\frac{T_{cr,m}}{T_{cr,\mathit{\exp}}}\)	T_{wy, exp} (kN-m)	T_{wy, m} (kN-m)	\(\frac{T_{wy,m}}{T_{wy,\mathit{\exp}}}\)	T_{u, exp} (kN-m)	T_u,m (kN-m)	\(\frac{T_{u,m}}{T_{u,\mathit{\exp}}}\)
T-2C	94.33	90.22	0.956	175.18	195.12	1.114	282.98	268.33	0.948
T-2C-S	81.39	90.22	1.108	157.93	195.12	1.235	275.43	268.33	0.974
T-3C	242.55	296.75	1.223	614.46	601.76	0.979	743.82	743.28	0.999
T-3C-S	258.72	296.75	1.147	679.14	675.44	0.995	719.57^a	795.51	1.106
S-3	314.23	263.13	0.837	395.71	466.75	1.180	530.25	553.22	1.043
S-5	323.79	270.13	0.834	431.87	498.05	1.153	592.70	640.31	1.080
SU-5	331.55	281.40	0.849	503.93	548.46	1.088	712.56	748.81	1.051
Mean value			0.993			1.106			1.029
Standard deviation			0.152			0.087			0.053

Note that: exp represents the experimental results; m represents the predicted values from the USMMT
^aDue to the limitation of test methods, T-3C-S may not actually reach the ultimate torque