Stresses up to 75% of the girder yield stress were obtained in the bridge, whose design was controlled by strength, thus representing some of the largest stresses ever achieved in an instrumented curved steel girder bridge, and behavior is described in the girders, diaphragms, lateral wind bracing, deck, bearings, and fatigue details.
Type Items G1 G2 G3 Two girder Yielding load (kN) 2500 – Yielding displacement (mm) 89.1 86.9 Max.
The oldest is the beam and girder system, whose form was derived from wood and steel construction: slabs rest on beams, beams rest on girders, and girders rest on columns in a regular pattern.
Every arc, nut, bolt and girder tells a story.
For the three-girder bridge, the yield and failure loads were approximately 5400 and 6400 kN, respectively, indicating superior structural performance over the two-girder system.
For the two-girder bridge, the yield and failure loads were approximately 2500 and 2800 kN, respectively, where the maximum deflection difference between G1 and G2 was 3 mm.
Summarized herein is a study that explored single span, horizontally curved, plate girders having a yield stress of 50 ksi (345 MPa) to investigate their flexural behavior as a function of the position of a single longitudinal stiffener at various locations along the depth of the web.
The available design model is compared to the FE results and it is found to yield suitable results for girders used in bridges as well as conventional structures.
Besides, the yield strength of the steel girder also has an apparent effect on the ratio, of which the higher yield strength of the steel girder could lead to a lower ratio, while the concrete slab compressive strength has less influence on the ratio.
For hybrid girders, it is shown that this restriction applies to the yield strength of the flanges and that yielding of the web does not influence the fatigue strength.
Results indicate that the proposed formulation does a better job in predicting the web strength of transversely stiffened girders subjected to patch loading than the EN1993-1-5 specificathus, and thus yield a lighter and more economical design for these specific girder geometries.
