Prestressed Concrete Box Girder Anchorage Zone Of Tooth Plate STMs And Anchor Of Calculating Cracking Under Analysis

With the rapid development of traffic services, the concrete box girder has been moreapplications in many bridge structure in its operations or construction process, the stressinterference zone (D zone) structural cracks have been very popular, due to interference areaforce and geometry of complex domestic There is no more mature design method. Toothplate anchorage zone, for example Reinforcement Design for further study on the basis ofSTMs, and crack resistance of the anchorage zone analysis, specific content summarized asfollows:1. Analysis STMs design ideas and the design features of the various elements discussedfirst model framework, after quantitative refinement STMs configuration method; strengthchecking method to analyze different specifications of the score, the proposed the proposedeffective compressive strength calculation method; combined with some of the provisions ofour bridge design specification, gives recommendations based on the compressive strength ofmy Regardless of Bridge design.2. The box girder toothed plate of Zambia Sylmar Bridge, for example, built finiteelement model analysis, a tooth plate anchorage zone stress trajectory STMs constructionmethods and reinforcement points then build a tooth plate STMs, calculated based on theinternal forces of the rod and the reinforcement calculation, Figure this method of tooth platereinforcement is safe feasible.3. Build STMs strut rod and node of the checking and comparative analysis of·theamount of reinforcing steel in accordance with the amount of reinforcing steel STMsapproximate estimation method, verify STMs law reinforcement the correctness.4. For post-tensioned anchorage zone prone to crack under tension anchor problem, wefirst compared the differences of European norms and norms splitting calculated under theanchor specified, then anchoring end points of a rectangular cross-section of verticalanchoring and inclination the anchor two cases discussed, simulated according to the finiteelement analysis results of the trace of the principal stress build out, by the analysis of thetrace of the principal stress in both cases STMs, on this basis, respectively deduced formularesultant position of the center of gravity the anchor under splitting force and the anchorpoint, and with the European norms, American norms and the results of the finite elementanalysis and comparison to verify the applicability of the formula.