Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 72 views

    4PB Pilecap Design

    Uploaded by

    JONAS NG
    1. This document provides design details for a pile cap without column end moments. It includes dimensions for the column, pile, and cap thickness. 2. Bending reinforcement is calculated to be 12T20 rebar, with a minimum of 4 bars required. Shear capacity is checked and fails. 3. Anchorage length and hook details are provided to satisfy bond requirements. A diagram shows the hook geometry.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    4PB Pilecap Design

    Uploaded by

    JONAS NG
    72 views2 pages
    1. This document provides design details for a pile cap without column end moments. It includes dimensions for the column, pile, and cap thickness. 2. Bending reinforcement is calculated to be 12T20 rebar, with a minimum of 4 bars required. Shear capacity is checked and fails. 3. Anchorage length and hook details are provided to satisfy bond requirements. A diagram shows the hook geometry.

    Original Description:

    Original Title

    4PB PILECAP DESIGN

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    1. This document provides design details for a pile cap without column end moments. It includes dimensions for the column, pile, and cap thickness. 2. Bending reinforcement is calculated to be 12T20 rebar, with a minimum of 4 bars required. Shear capacity is checked and fails. 3. Anchorage length and hook details are provided to satisfy bond requirements. A diagram shows the hook geometry.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    72 views2 pages

    4PB Pilecap Design

    Uploaded by

    JONAS NG
    1. This document provides design details for a pile cap without column end moments. It includes dimensions for the column, pile, and cap thickness. 2. Bending reinforcement is calculated to be 12T20 rebar, with a minimum of 4 bars required. Shear capacity is checked and fails. 3. Anchorage length and hook details are provided to satisfy bond requirements. A diagram shows the hook geometry.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    Project : Job No :

    Description : Date :

    4 PILE PILECAP DESIGN (WITHOUT COLUMN END MOMENT)

    300 750 300

    12T20

    300

    750 1350
    b

    y 300

    x 12T20
    av
    1350

    1. Column size :
    b= 300.0 mm
    h= 900.0 mm
    2. Pile size/diameter, hp = 300 mm (minimum cap thickness = 700.0 mm)
    3. Pilecap thickness = 700 mm
    Effective depth of cap,d = 595.0 mm
    4. Spacing factor of pile, x = 2.5 (normally between 2 and 3 depending on ground conditions)
    Pile spacing, s = xhp 750.0 mm
    5. Pile capacity = 800.0 KN
    6. Max. deviation of pile = 75.0 mm

    BENDING REINFORCEMENT (in x and y -Direction)


    Concrete grade, fcu = 30 N/mm2
    Steel grade, fy = 460 N/mm2

    Maximum moment, M = 0.00 KNm


    K= 0.0000
    z=d{0.5+[0.25-(K/0.9)]^0.5} = 565.25 mm < 0.95d
    As required = M/(0.87fyz) = 0.00 mm2
    As minimum = 0.13%Ac = 1228.5 mm2 ~ Governed
    Diameter of rebar used = 20 mm
    Min nos. of rebar required = 4 ~ Provide 12T20
    As provided = 3769.91 mm2 > Asreq, OK
    % rebar provided = 0.40 %Ac > 0.13% and < 4.0%, OK

    SHEAR CHECKING (in x and y -Direction)


    Shear force, V = 2400.0 KN
    Actual shear stress, v = 2.988 N/mm2

    Critical shear stress, vc based on Table 3.9 of BS8110 : Pt 1


    vc = 0.522 N/mm2
    av = -165.0 mm av < 2d, OK
    Allowable shear stress,vc modified = -3.764 N/mm2 v > vc, Failed !!!

    ANG ML
    Project : 0 Job No : 0
    Description : 0 Date : 0-Jan-00

    BAR ANCHORAGE LENGTH


    (i) x and y -Direction

    a/d = -0.277
    Bond factor, BF = 2.277 ~ Full truss action
    Permissible anchorage bond stress, fba = 3.98 N/mm2
    Anchorage bond length required, L = (Dia. of bar* 0.87*BF* Asreq)/(4*fba*Asprov)
    L= 373.6 mm

    Permissible bearing strength, fr = (2*fcu)/{1 + 2(dia/spacing of bar)}


    fr = 41.49 N/mm2
    Internal radius of bend, r = {(Pi*dia*0.87*fy*BF*Asreq)/(4*fr*Asprov)}*(length of bar after start of bend/L)
    r= 91.13 mm
    Effective anchorage bend of hook = 240.0 mm

    centre of pile

    300.0 mm
    -5.29 mm
    (start of anchorage)
    186.98
    81.14 mm
    r 91.13 mm
    20 mm

    240.0 mm
    138.9 91.13

    Cut section details

    ANG ML

    You might also like