Disease Causes and Spatial Transverse Distribution Force Characteristics of Ⅰ-Shaped Composite Beams
Focusing on the small-flange assembly Ⅰ-shaped composite beam bridge on the G55 Erguang Expressway,this paper established the 3D solid model by the finite element software to simulate and analyze the force state of the actual structure.The influences of the transverse diaphragm under different setting conditions on the vertical and lateral deflections of the thin-web assembly Ⅰ-beams were compared and analyzed.The transverse distribution laws of the vertical and lateral force of the main beam and the disease cause of the Ⅰ-shaped composite beam were obtained.On this basis,this paper proposed a reinforcement scheme of adding the transverse diaphragm and external prestress,providing a reference for the reinforcement design of similar bridge structures.
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