Simulation Analysis Of Long-span Rigid-frame Bridges With High Piers

Long-span rigid-frame bridges with high piers simultaneously has the Trigid frame and continuous beam's merit. The pillar body combines the big flexural rigidity and small anti-push rigidity to effectively improve the structure stress situation and more suitable to construct the great-span bridge. It has become the first choice for the bridge design. But, along with society's development, the bridge construction accuracy requirement is getting higher and higher. Speaking of the great-span bridge, simulation analysis is especially important.This article takes Guizhou Province's Zhaoxing Bridge as the research background, carries on the simulation analysis using CSB and the MIDAS. The primary coverage is as follows:First, takes research on the high-pier and long-span rigid-frame bridge and its construction monitoring, analyzing its present development situation and the stress characteristic and so on.Next, introduces the construction monitoring's importance and the content as well as the influence factor on construction monitoring briefly, and introduces the detailed analytic method used for calculating.Third, introduces the computational method on construction control, the finite element theory, the concrete shrinkage and creep mechanism, the bridge's temperature effect, the construction elevation's control and the nonlinear analysis and so on, and has conducted the analytical study.Fourth, takes Zhaoxing bridge as the example and carries on the finite element division, the structure analysis, the main constructs flow introduction and so on, utilizing special-purpose great-span bridge construction dynamic process monitoring simulation analysis software CSB to carry on the simulation computation for each stage, consequently obtains the stress, the strain, the endogenic force and the amount of deflection change curve on each construction stage.Fifth, utilizes South Korean's large-scale general finite element software MIDAS-CIVIL to carry on the simulation analysis, and emphatically carries on analyses on the shrinkage and creep, the temperature change, motion load and so on.Finally, contrasts the finished bridge data and the construction stage data separately coming from CSB and MIDAS, it indicates the data error is allowed in the scope, the simulation analysis effect achieves the design requirements completely.