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RAM | STAAD | ADINA Wiki Shear Enhancement Factor Calculation for Pile Cap design
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    Shear Enhancement Factor Calculation for Pile Cap design

    Applies To
    Product(s): STAAD Advanced Concrete Design
    Version(s): Connect Edition
    Environment:
    Area: Concrete Design
    Subarea: Pilecap Design
    Original Author: Bentley Technical Support Group

     Please explain how the av and shear enhancement factor is calculated in pile-cap design as per IS 456? Also please explain how sometimes shear enhancement factor values are very high which comes in the range of 50?

    Below sketch showing the calculation of av value for the pile-cap design.

    •  

      Av          = 290 – 270

                     = 20 mm

      Av is the distance between load location and section considered. Refer below snap from IS 456

       

      So the enhancement factor is     = 2 x deff / av

                                                                  = 2 x 540 / 20

                                                                  = 54

                               

                             Tce         = Tc x Enhancement factor

                                            = 0.33 x 54

                                             =  17.82 > 3.5 N/sqmm (TcMax) thus restricted to 3.5 N/sqmm

                                             Below snap from IS 456 for TcMax

                                          

    • Shear enhancement factor
    • pilecap
    • RCDC
    • load
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    • Madhuri Panda Created by Bentley Colleague Madhuri Panda
    • When: Tue, Apr 9 2019 7:33 AM
    • Abhisek M Last revision by Bentley Colleague Abhisek M
    • When: Wed, Mar 16 2022 8:45 AM
    • Revisions: 11
    • Comments: 0
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