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    [PDF] The Complete Guide to Prestressing Ebook

    BLOG BRIDGE INSIGHT

     


    Confused about how to model Prestressing?

     

    Please fill out the Download Section (Click here) below the Comment Section to download the PDF Files!

     


     

    Prestressing concrete provides internal compression, which counteracts the tension caused by loads coming onto it. It can be internal or external, pre-tensioned or post-tensioned, straight or curved. But the important thing is the application of appropriate prestressing load in the proper location along the length of the girder/beam.

     

     

    Through this eBook, you can understand different tendons, and various profile generation techniques and appropriately predict the various long-term and immediate losses in midas civil. Examples are used for the calculation and verification of the losses in midas civil. Some key tips/notes are provided along the way for better modeling.

     

    e-book_2

     

    Key Points

     

    1. What is prestressing?

     

    Prestressing is the process by which the concrete element is compressed using wires, strands, etc. Concrete is a compression resisting material and its tension resisting capacity is very poor. So, the ultimate purpose of prestressing is that most of the concrete remains in compression even after the load is applied.

     

    This can be achieved via 3 methods:

        01-1. Internal Pre-tension
        01-2. Internal Post-tension
        01-3. External Post-tension

     

    2. Losses in Tendons

    They are mainly divided into 2 categories: Immediate loss and long-term loss.

     

    3. How to Apply Prestressing in MIDAS CIVIL?

     

    03-1. Tendon Property

                 03-1-1. Total Tendon Area

                 03-1-2. Duct Diameter

                 03-1-3. Strand Diameter

                 03-1-4. Relaxation Coefficient

                 03-1-5. Curvature Friction Factor

                 03-1-6. Wobble Friction Factor

                 03-1-7. External Cable Moment Magnifier

     

    03-2. Tendon Property

                03-2-1. Typical Tendon

                03-2-2. Debonded Length

                03-2-3. Reference Axis

                03-2-4. Profile Insertion Point 

                03-2-5. Point of Symmetry

                03-2-6. X-axis Direction

     

    03-3. Tendon Prestress

      

    4. Methods of Defining a Tendon Profile

     

    04-1. Simple Beam

    04-2. Curved Tendon Profile

    04-3. Beam in X-Y Plane

    04-4. PSC Section with Inclined Web

    04-5. Copying of Tendon

      

    5. Loss Verification

     

    05-1. Immediate Loss

                  05-1-1. Elastic Shortening Loss

                  05-1-2. Anchorage Slip

                  05-1-3. Friction Loss

                  05-1-4. Creep & Shrinkage Loss

                  05-1-5. Relaxation Loss

     

    6. Common Mistakes While Modeling Tendons

        Common mistakes while modeling the tendon in midas Civil occur while defining the tendon profile.

     


     

    Please fill out the Download Section (Click here) below the Comment Section to download the PDF Files!

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