Research purposes:It is extremely complex for the details in the orthotropic deck of the steel curved box beam with small radius,with the complicated mechanic behavior under the bending and torsion.In order to investigate the mechanical performance of orthotropic deck of the steel curved box beam with small radius,and provide the optimized details for this type of bridge deck,this paper conducted a detailed study in the mechanical performance of this kind of orthotropic deck subjected to the wheel load with the numerical analysis.In addition,the multi-objective optimization in the steel bridge deck was launched using orthogonal test,as well as developing software for the optimization of the orthotropic deck of the steel curved box beam with IntelliJ IDEA.Research conclusions:(1)The largest bending moment section in side span is the most critical for the main stresses in the most key details,with the obvious large stress in the detail 3(the welding hole arc in diaphragms).Besides,as the wheel load on the raised side,the stresses of orthotropic deck are larger than those,as the load in the middle.(2)The main stresses in the critical details are almost identical as the wheel load on and between the ribs,yet the stresses are great different as the load on or between the diaphragms and each critical load position for these details are obtained.(3)For the curved steel box beam,the new steel-concrete composite bridge deck,with muti-objective optimization details,has much better mechanical performance than the steel orthotropic deck.(4)The research results can provide the optimization for the design and maintenance for the orthotropic deck on the steel curved box beam.
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