Simulation And Sling Tension Optimization For The Construction Of Concrete Self-anchor Suspension Bridge

Self-anchored suspension bridge has become more and more popular, and has beenwidely used in urban medium and short span bridges because it has graceful modeling,economic advantages and adaptability to various. Although the self-anchored suspensionbridge and uplift of self-anchored suspension Bridges in the form of the differences are onlythe cable anchor from the earth moved to the anchorage of stiffening girder ends, but thestructure stress and construction method has changed greatly, make simulation self-anchoredsuspension bridge in various stages of construction made difficult, especially the sling tensionstage, it is necessary to how to make a reasonable economic security sling tension scheme offurther research and discussion.Due to the calculation of self-anchored suspension bridge has great difficulty, combiningcalculation theories with FEM, reasonable construction control calculation methods wasfound, Considering the self-anchored suspension bridge in the calculation of the depositsimulation main cable large displacement nonlinear, concrete shrinkage and creep nonlinear,support nonlinear contact, establish the ideal bridge state. Second, through to the ideal of thebridge state model and installing and fall, further calculation concrete from the anchor typesuspension cable construction need the following data: cast-in-situ concrete girder cast thehigh, girders axial compression, the main tower behind the root, the high cable shares withoutstress material feeding length, the benchmark of linear, the cable clip lofting, sling no stressmaterial feeding length.Through calculation and example analysis, this paper studies how to establish a safe andreasonable economic sling tension scheme. Sling tension proposal making the factorsconsidered basically has the following four: sling tension during the safety of the bridgecomponents, the saddle pushing number of times and the time, sling tension of time, answerthe long pole and the number of the number of jack. Considering the above factors, to abridge under construction in three sets of sling tension scheme contrast, separately from thejack, use at least use at least a pole, do not need to balance the three, compared the optimalscheme than elected, and calculates the two of them with excellent sling tension scheme eachdrawing steps each component part of stress and displacement. At present, the number of domestic self-anchored suspension bridge is rare,so referencedata is also rare. This paper contrast the theoretical calculation and the actual data, andprove data in this paper for the theoretical calculation is correctness and reliability.for the restof the concrete self-anchored suspension bridge construction and monitoring to offer somebasis.