Construction sequence optimization for the construction of arch building on a long-span continuous steel pipe concrete arch bridge
In order to optimize the construction sequence of the upper arch structure of a large-span steel pipe concrete arch bridge,the finite element software Midas/Civil is used to model and numerically analyze the arch bridge.The displacement,stress,and stability of the main arch ring control section are calculated under four construction schemes:Scheme 1(erecting the upper column from the arch foot to the arch crown and then the T-beam from the arch foot to the arch crown),Scheme 2(erecting the upper column from the arch crown to the arch foot and then the T-beam from the arch crown to the arch foot),Scheme 3(simultaneously erecting the upper column and T-beam from the arch foot to the arch crown),and Scheme 4(simultaneously erecting the upper column and T-beam from the arch crown to the arch foot).Ensuring construction safety and following the principle of symmetric loading,the construction sequence of the upper arch structure Is optimized.Results show that after the bridge is completed,the displacements and stresses of Scheme 3 is the smallest with minimal variations during construction.The Scheme 3 is the optimal construction scheme.The construction sequence corresponding to Scheme 3 meets the safety requirements of structural construction,allowing simultaneous construction of the upper columns and bridge deck T-beams,effectively reducing the construction period.
a long-span continuous steel pipe concrete arch bridgenumerical analysisconstruction sequenceoptimization
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