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    Steel-Angle Bracing Design-1

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    rohitbhagat005
    The document summarizes the design of various structural members and connections for a building. It describes the sizing and design checks performed for angle members, strut members, and gusset plate connections at intermediate bracing levels and the roof. Design codes, member sizes, forces, and checks for strength, slenderness, bearing capacity and shear capacity are presented. Plate thicknesses and bolt configurations are adjusted where checks indicate the need for increased capacity.

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    Steel-Angle Bracing Design-1

    Uploaded by

    rohitbhagat005
    263 views12 pages
    The document summarizes the design of various structural members and connections for a building. It describes the sizing and design checks performed for angle members, strut members, and gusset plate connections at intermediate bracing levels and the roof. Design codes, member sizes, forces, and checks for strength, slenderness, bearing capacity and shear capacity are presented. Plate thicknesses and bolt configurations are adjusted where checks indicate the need for increased capacity.

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    The document summarizes the design of various structural members and connections for a building. It describes the sizing and design checks performed for angle members, strut members, and gusset plate connections at intermediate bracing levels and the roof. Design codes, member sizes, forces, and checks for strength, slenderness, bearing capacity and shear capacity are presented. Plate thicknesses and bolt configurations are adjusted where checks indicate the need for increased capacity.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    263 views12 pages

    Steel-Angle Bracing Design-1

    Uploaded by

    rohitbhagat005
    The document summarizes the design of various structural members and connections for a building. It describes the sizing and design checks performed for angle members, strut members, and gusset plate connections at intermediate bracing levels and the roof. Design codes, member sizes, forces, and checks for strength, slenderness, bearing capacity and shear capacity are presented. Plate thicknesses and bolt configurations are adjusted where checks indicate the need for increased capacity.

    Copyright:

    © All Rights Reserved
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    of 12

    A) MEMBER DESIGN:

    Design Code: IS 800

    1) ANGLE DESIGN:
    Angle Size: 2L - 75x75x6
    Fy = 250 MPa
    Length = 10.2 m
    Tension Force = 135.0 kN
    Assume Bolt Diameter = 20 mm 20.6 mm

    Check for Slenderness


    Limiting l = 350 2L- 75x75x6
    l (In Plane) = 220.65 OK
    l (Out of Plane) = 295.06 OK

    Check for Strength


    Allowable Tension Force = 190.62 kN OK
    TATA TUBE 113.5x11
    2) STRUT DESIGN: TATA TUBE 220x220 (4.0) TATA TUBE 113.5x11
    Strut Size: TATA TUBE 220x220 (4.0) TATA TUBE 132x13
    Fy = 310 MPa TATA TUBE 132x13
    Length = 6.3 m TATA TUBE 180x18
    Compression Force = 135.0 kN TATA TUBE 180x18
    TATA TUBE 180x18
    Check for Slenderness TATA TUBE 180x18
    Limiting l = 250 20.6 mm TATA TUBE 220x22
    l= 71.10 OK TATA TUBE 220x22
    TATA TUBE 220x22
    Check for Strength TATA TUBE 220x22
    Allowable Compression Stress = 112.48 MPa
    Allowable Compression Force = 384.12 kN OK
    All Figures are representative only.
    A) CONNECTION DESIGN:
    I) SIDE WALL INTERMEDIATE LEVEL BRACING CONNECTION DESIGN

    Design Code: IS 800

    Bracing Force = 135.0 kN Along Bracing Angle


    Horizontal Force = 87.0 kN Along Strut
    Vertical Force = 83.0 kN Along colum web
    Plate Fy = 345 MPa

    Gusset Design:

    Check for Bolts:


    Bolt Diameter = 20 mm A-325 Grade
    Input No. of Bolts = 2 At each end
    Bolt Strength = 181.84 kN for 2 bolt/s OK
    12mm
    Check for Plate: 20mm
    Assume Plate Thk = 12 mm PLATE NOT OK. Increase Plate Thk / Bolt Dia / Bolt Nos

    1) Check for Bolt Bearing on Plate: 12 mm THK GUSSET 20.6


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 124.20 kN NOT OK TATA TUBE 220x220 (4.0)
    2 Nos 20 Dia A-325 Bolts
    2) Check for Plate Shear: 4 Nos 24 Dia A-325 Bolts 2L- 75x75x6
    Plate Shear capacity = 127.51 kN NOT OK

    3) Check for Cone Failure:


    Capacity = 310.50 kN OK
    10mm Thk Back-up Plate
    Check for Angle:
    Angle Thk = 6 mm ANGLE NOT OK. Increase Plate Thk
    10mm Thk Bent Plate
    / Bolt Dia / Bolt Nos
    1) Check for Bolt Bearing on Angle:
    All. Bearing Stress = 188 MPa
    Bolt Bearing capacity = 90.00 kN NOT OK 12mm Thk Back-up Plate

    2) Check for Angle Shear:


    Plate Shear capacity = 92.40 kN NOT OK TATA TUBE 220x220 (4.0)

    4 Nos 24 Dia A-325 Bolts


    2L- 75x75x6
    Connection Plate with Column Web: 20.6
    12 mm THK GUSSET
    Check for Bolts:
    Bolt Diameter = 24 mm A-325 Grade
    Input No. of Bolts = 4 Nos in total
    Bolt Strength = 261.84 kN for 4 bolt/s OK 10 mm THK BENT PLATE
    Check for Bent Plate: All Figures are representative only.
    Assume Plate Thk = 10 mm
    Plate Fy = 345 MPa ANGLE BRACE CONNECTION AT INTERSECTION

    1) Check for Bolt Bearing on Plate:


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 248.40 kN OK

    2) Check for Plate Shear:


    Plate Shear capacity = 251.16 kN OK

    3) Check for Column Web: 2L- 75x75x6


    Column Web = 6 mm
    Web Bearing Capacity = 149.04 kN OK
    2 Nos 20 Dia A-325 Bolts
    Strut End Plate Connection:
    12 mm THK GUSSET
    Bolt Diameter = 20 mm A-325 Grade
    Input No. of Bolts = 4 At each end
    Bolt Strength = 380.76 kN for 4 bolt/s OK
    2 Nos 20 Dia A-325 Bolts
    Connection at Eave:
    Check for Bolts:
    Bolt Diameter = 20 mm A-325 Grade
    Input No. of Bolts = 2 At each end
    Bolt Strength = 181.84 kN for 4 bolt/s OK

    Check for T-Plate: Provide 12mm Thk Insert Plate between 2 Angles
    Assume Plate Thk = 8 mm At Stitch Bolt Locations

    1) Check for Bolt Bearing on Plate:


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 165.60 kN OK

    2) Check for Plate Shear:


    Plate Shear capacity = 170.02 kN OK

    3) Check for Cone Failure:


    Capacity = 207.00 kN OK
    12 mm THK GUSSET

    2L- 75x75x6

    8mm Thk Stiffener


    8mm Thk T-Plate
    TATA TUBE 220x220 (4.0)
    4 Nos 24 Dia A-325 Bolts

    12 mm THK GUSSET

    2 Nos 20 Dia A-325 Bolts


    12mm Thk Back-up Plate
    4 Nos 20 Dia A-325 Bolts
    12 mm THK GUSSET 2L- 75x75x6

    2 Nos 20 Dia A-325 Bolts


    A) CONNECTION DESIGN:
    II) ROOF BRACING CONNECTION DESIGN

    Design Code: IS 800

    Bracing Force = 135.0 kN Along Bracing Angle


    Horizontal Force = 100.0 kN Along Strut
    Horizontal Force = 100.0 kN Along Rafter Web
    Plate Fy = 345 MPa

    Gusset Design:

    Check for Bolts:


    Bolt Diameter = 20 mm A-325 Grade
    Input No. of Bolts = 2 At each end
    Bolt Strength = 181.84 kN for 2 bolt/s OK ANGLE BRACE CONNECTION AT BRACING
    ATTACHMENT 12mm
    Check for Plate: 24mm
    Assume Plate Thk = 12 mm PLATE NOT OK. Increase Plate Thk / Bolt Dia / Bolt Nos

    1) Check for Bolt Bearing on Plate: 12 mm THK GUSSET 20.6


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 124.20 kN NOT OK TATA TUBE 220x220 (4.0)
    2 Nos 20 Dia A-325 Bolts
    2) Check for Plate Shear: 4 Nos 24 Dia A-325 Bolts 2L- 75x75x6
    Plate Shear capacity = 127.51 kN NOT OK

    3) Check for Cone Failure:


    Capacity = 310.50 kN OK
    10mm Thk Back-up Plate
    Check for Angle:
    Angle Thk = 6 mm ANGLE NOT OK. Increase Plate 10mm Thk Bent Plate
    Thk / Bolt Dia / Bolt Nos
    1) Check for Bolt Bearing on Angle:
    All. Bearing Stress = 188 MPa
    Bolt Bearing capacity = 90.00 kN NOT OK 12mm Thk Back-up Plate

    2) Check for Angle Shear:


    Plate Shear capacity = 92.40 kN NOT OK TATA TUBE 220x220 (4.0)

    4 Nos 24 Dia A-325 Bolts


    2L- 75x75x6
    Connection Plate with Rafter Web: 20.6
    12 mm THK GUSSET
    Check for Bolts:
    Bolt Diameter = 24 mm A-325 Grade
    Input No. of Bolts = 4 Nos in total
    Bolt Strength = 261.84 kN for 4 bolt/s OK 10 mm THK BENT PLATE
    Check for Bent Plate:
    Assume Plate Thk = 10 mm All Figures are representative only.
    Plate Fy = 345 MPa ANGLE BRACE CONNECTION AT INTERSECTION

    1) Check for Bolt Bearing on Plate:


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 248.40 kN OK

    2) Check for Plate Shear:


    Plate Shear capacity = 251.16 kN OK

    3) Check for Rafter Web: 2L- 75x75x6


    Rafter Web = 6 mm
    Web Bearing Capacity = 149.04 kN OK
    2 Nos 20 Dia A-325 Bolts
    Strut End Plate Connection:
    12 mm THK GUSSET
    Bolt Diameter = 24 mm A-325 Grade
    Input No. of Bolts = 4 At each end
    Bolt Strength = 548.30 kN for 4 bolt/s OK
    2 Nos 20 Dia A-325 Bolts

    Provide 12mm Thk Insert Plate between 2 Angles


    At Stitch Bolt Locations
    A) CONNECTION DESIGN:
    I) SIDE WALL INTERMEDIATE LEVEL BRACING CONNECTION DESIGN

    Design Code: IS 800


    10mm Thk T-Plate
    Bracing Force = 135.0 kN Along Bracing Angle
    Horizontal Force = 100.0 kN Along Strut TATA TUBE 220x220 (4.0)

    Plate Fy = 345 MPa

    Stiffener Design:

    Check for Bolts:


    Bolt Diameter = 24 mm A-325 Grade
    Input No. of Bolts = 2 At each end 2 Nos 24 Dia A-325 Bolts
    Bolt Strength = 261.84 kN for 2 bolt/s OK 2 Nos 24 Dia A-325 Bolts in 1 row
    Total 4 Nos
    Check for Stiffener Plate: 2L- 75x75x6
    Assume Plate Thk = 15 mm

    1) Check for Bolt Bearing on Plate:


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 186.30 kN OK

    2) Check for Plate Shear: 15mm Thk Stiffener


    Plate Shear capacity = 188.37 kN OK

    3) Check for Cone Failure:


    Capacity = 388.13 kN OK

    Check for Angle:


    ANGLE NOT OK.
    Angle Thk = 6 mm Increase Plate Thk /
    Bolt Dia / Bolt Nos
    1) Check for Bolt Bearing on Angle:
    All. Bearing Stress = 188 MPa
    Bolt Bearing capacity = 108 kN NOT OK

    2) Check for Angle Shear:


    Plate Shear capacity = 109.20 kN NOT OK

    All Figures are representative only.

    Check for Flange Bolts:


    Bolt Diameter = 24 mm A-325 Grade
    Input No. of Bolts = 4 Nos in total
    Bolt Strength = 261.84 kN for 4 bolt/s OK

    Check for T-Plate:


    Assume Plate Thk = 10 mm
    Plate Fy = 345 MPa

    1) Check for Bolt Bearing on Plate:


    All. Bearing Stress = 259 MPa
    Bolt Bearing capacity = 248.40 kN OK

    2) Check for Plate Shear:


    Plate Shear capacity = 251.16 kN OK

    3) Check for Rafter Flange:


    Rafter Flange = 6 mm
    Flange Bearing Capacity = 149.04 kN OK
    Flange Shear Capacity = 150.70 kN OK
    ATA TUBE 220x220 (4.0)
    DOUBLE ANGLE PROPERTIES
    TYPE SECTION D B T Ax Rx Ry An
    2L 75x75x6 75 75 6 1732 23 34.4 1468
    2L 75x75x8 75 75 8 2276 22.8 34.9 1924
    2L 75x75x10 75 75 10 2804 22.6 35.4 2364
    2L 100x100x8 100 100 8 3078 30.7 44.8 2726
    2L 100x100x10 100 100 10 3806 30.5 45.2 3366
    2L 100x100x12 100 100 12 4518 30.3 45.6 3990
    2L 130x130x8 130 130 8 4044 30.3 45.6 3692
    2L 130x130x10 130 130 10 5012 40.1 57.2 4572
    2L 130x130x12 130 130 12 5964 39.9 57.6 5436
    2L 150x150x10 150 150 10 5806 46.3 65.0 5366
    2L 150x150x12 150 150 12 6918 46.1 65.4 6390

    TYPE NB OD T A R
    NB100-4.5THK 100 114.3 4.5 1550 38.9
    NB150-4.85THK 150 165.1 4.85 2440 56.7
    NB200-5.6THK 200 219.1 5.6 3760 75.5

    Bolt Diameter Single Shear Double Shear Tension


    12 16.37 32.73 34.27
    16 29.09 58.19 60.92
    20 45.46 90.92 95.19
    24 65.46 130.92 137.07
    30 102.28 204.57 214.18
    32 116.37 232.75 243.69
    36 147.29 294.57 308.42

    TYPE D B T A R
    TATA TUBE 113.5x113.5 (4.8) 113.5 113.5 4.8 2028 44.0
    TATA TUBE 113.5x113.5 (5.4) 113.5 113.5 5.4 2260 43.8
    TATA TUBE 132x132 (4.8) 132 132 4.8 2383 51.6
    TATA TUBE 132x132 (5.4) 132 132 5.4 2659 51.3
    TATA TUBE 180x180 (4.0) 180 180 4.0 2775 71.6
    TATA TUBE 180x180 (5.0) 180 180 5.0 3436 71.1
    TATA TUBE 180x180 (6.0) 180 180 6.0 4083 7.06
    TATA TUBE 180x180 (7.0) 180 180 7.0 4718 7.01
    TATA TUBE 220x220 (4.0) 220 220 4.0 3415 87.9
    TATA TUBE 220x220 (5.0) 220 220 5.0 4236 87.4
    TATA TUBE 220x220 (6.0) 220 220 6.0 5043 87.0
    TATA TUBE 220x220 (7.0) 220 220 7.0 5838 86.5
    AISC DESIGN IS DESIGN (For 2
    Ae All Tension (kN) An Ae All Tension (kN) An Ae All Tension (kN) Cxx A1 A2
    1101.0 165.15 1420 1065.0 159.75 1348 1011.0 151.65 20.6 600 864
    1443.0 216.45 1860 1395.0 209.25 1764 1323.0 198.45 21.4 784 1136
    1773.0 265.95 2284 1713.0 256.95 2164 1623.0 243.45 22.2 960 1400
    2044.5 306.68 2662 1996.5 299.48 2566 1924.5 288.68 27.6 1184 1536
    2524.5 378.68 3286 2464.5 369.68 3166 2374.5 356.18 28.4 1460 1900
    2992.5 448.88 3894 2920.5 438.08 3750 2812.5 421.88 29.2 1728 2256
    2769.0 415.35 3628 2721.0 408.15 3532 2649.0 397.35 35.0 1664 2016
    3429.0 514.35 4492 3369.0 505.35 4372 3279.0 491.85 35.8 2060 2500
    4077.0 611.55 5340 4005.0 600.75 5196 3897.0 584.55 36.6 2448 2976
    4024.5 603.68 5286 3964.5 594.68 5166 3874.5 581.18 40.6 2460 2900
    4792.5 718.88 6294 4720.5 708.08 6150 4612.5 691.88 41.4 2928 3456
    IS DESIGN (For 20 Dia Bolt) IS DESIGN (For 24 Dia Bolt) IS DESIGN (For 30 Dia Bolt)
    k Ae All Tension (kN) A1 A2 k Ae All Tension (kN) A1 A2 k Ae
    0.78 1270.8 190.62 552 864 0.76 1210.0 181.50 480 864 0.74 1115.3
    0.78 1664.8 249.71 720 1136 0.76 1583.5 237.53 624 1136 0.73 1456.8
    0.77 2043.9 306.58 880 1400 0.76 1942.1 291.31 760 1400 0.73 1783.1
    0.79 2403.6 360.54 1120 1536 0.78 2325.4 348.81 1024 1536 0.77 2205.5
    0.79 2967.6 445.14 1380 1900 0.78 2869.8 430.47 1260 1900 0.77 2719.8
    0.79 3516.9 527.53 1632 2256 0.78 3399.4 509.91 1488 2256 0.77 3219.1
    0.80 3286.8 493.02 1600 2016 0.80 3210.2 481.53 1504 2016 0.79 3093.8
    0.80 4071.7 610.76 1980 2500 0.80 3976.0 596.40 1860 2500 0.79 3830.3
    0.80 4841.9 726.29 2352 2976 0.80 4727.0 709.05 2208 2976 0.79 4552.1
    0.81 4806.7 721.01 2380 2900 0.80 4711.8 706.76 2260 2900 0.80 4567.7
    0.81 5724.0 858.60 2832 3456 0.80 5610.0 841.50 2688 3456 0.80 5437.1
    SIGN (For 30 Dia Bolt)
    All Tension (kN) Plate Width
    167.29 125
    218.52 125
    267.46 125
    330.83 150
    407.96 150
    482.86 150
    464.07 180
    574.55 180
    682.82 180
    685.16 200
    815.56 200

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