Longitudinal rigidity control method for high-pier and large-span concrete continuous rigid frame bridge and bridge
A technology of longitudinal stiffness and control method, applied in the direction of instrument, geometric CAD, calculation, etc., can solve the problems of difficult to control the longitudinal stiffness of high-pier and long-span continuous rigid frame bridges, and the longitudinal stiffness of bridges is difficult to meet the dynamic characteristics of vehicle-bridge coupling.
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Embodiment 1
[0075] Such as Figure 26 As shown, the longitudinal stiffness control method of long-span concrete continuous rigid frame bridge with high piers includes the following steps:
[0076] a. Establish an integrated calculation model of line piers, and simplify the rigid frame piers to the way that fixed supports correspond to independent piers;
[0077] b. Check and calculate the strength and stability of the track under different working conditions;
[0078] c. Apply loads, apply different loads to the continuous rigid frame bridge, and check the influence of each load on the force deformation of the seamless line, the loads include wind loads, temperature loads and loads generated by foundation settlement;
[0079] d. Determine the stiffness limit, use the finite element method to analyze the beam-rail interaction force and mutual displacement, and perform numerical solutions to determine the longitudinal stiffness limit of the fixed pier;
[0080] e. Determine the beam layou...
Embodiment 2
[0100] High-pier long-span concrete continuous rigid-frame bridge, the continuous rigid-frame bridge is a ballasted track, the high-pier long-span concrete continuous rigid-frame bridge obtained according to the longitudinal stiffness control method described in Example 1, the continuous rigid-frame bridge is In the case of different nominal temperature spans, the longitudinal stiffness limit of the fixed pier and the track treatment measures meet the following table 1.
[0101] Table 1 The rigidity limit of the longitudinal line of the fixed pier of the ballasted track continuous rigid frame beam
[0102]
[0103]
[0104] The calculation results of the seamless track on ballast track rigid frame bridges under various working conditions are highly correlated with the value of the stiffness of the abutment. Value, so that the pier stiffness selection of rigid frame bridges with different spans is more rational and scientific, on the one hand, it can ensure the safety of th...
Embodiment 3
[0130] High-pier long-span concrete continuous rigid-frame bridge, the continuous rigid-frame bridge is ballastless track, the high-pier long-span concrete continuous rigid-frame bridge obtained according to the above-mentioned longitudinal stiffness control method, the continuous In the case of temperature span, the longitudinal stiffness limit of the fixed pier and the track treatment measures meet the following table 4.
[0131] Table 4 Limits of longitudinal line stiffness of fixed piers of ballastless track continuous rigid frame beams
[0132]
[0133]For ballastless track rigid frame bridges, the calculation results of the seamless track under various working conditions are highly correlated with the value of the abutment stiffness. Value, so that the pier stiffness selection of rigid frame bridges with different spans is more rational and scientific, on the one hand, it can ensure the safety of the line, and on the other hand, it can also save engineering investment...
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