Phased Construction Of Composite Beam Cable-stayed Bridge Structure Analysis

The composite beam cable-stayed bridge is a very characteristic of super wide bridge, and the composite beam cable-stayed bridge in the transverse force and has its uniqueness, Taking Guang Fu River Bridge as the research background, the characteristic of bridge is a transverse deck is wide, width is40m, both span in concrete, span of composite beam structure. Considerations in construction of cross for assembling, laminated beam has15main steel girder section, in the assembly process, the weight of steel beam is relatively large, certainly will make both sides of the steel side box girder torsion angle of twist, how big, steel box side upper and lower edge stress, steel edge case deflection degree whether the effect of construction behind the steel beam assembly. Therefore as the key object of study, after the hope can give the actual project has practical value. Now in this dissertation are summarized as follows:1. the finite element analysis method in the plane space truss element stiffness matrix, the local coordinate system of the stiffness matrix of beam element, axial force, bending moment and shear force of plane beam element, space beam element. Laminated beam computation.2.pairs of Guang river bridge construction stages static analysis, research in the construction stages of tower top displacement, tower bottom stress of steel box girder; edge of upper and lower edge stress, torsion angle steel beam, steel edge beam deflection; lower edge stress on steel beam, steel beams, steel beam ends of torsion angle; small longitudinal upper and lower edge stress, small beam deflection; step B,1/4B,2/4B,3/4B edge beam edge beam edge stress, stress, edge beam deflection, beam deflection; as well as in bridge and steel edge beam edge stress steel beam, upper and lower edge stress and deflection; the above description do slip curve, minimum and maximum values and norms, analysis in the construction process of steel box girder of main stage side torsion angle is too large, if the late effects of beam erection.3. respectively on the laminated beam shear nails static work behavior, shear stud shear force, shear stud shear stiffness are described. The simulation of shear studs steel-concrete composite beam combination structure analysis is a key problem in actual shear nails, stress is more complex, and are vulnerable to other related factors, the shear nails with solid element simulation, finite element contact analysis, can obtain better effect. But in the actual number of shear studs, steel and concrete and its structure is more complex also, according to the actual situation of beam element can also be simulated shear nails, respectively, using finite element software to do12m beam shear stud spacing of100mm,150mm,200mm,250mm simply supported composite beams with prestressed tendons, simply supported laminated beam, continuous beam of composite beam, concrete plate, shear studs, steel box girder upper and lower edge stress, vertical displacement were compared and analyzed, the shear pin arranged under compression, beam element simulation of composite beam in practice can be.