# 4 Bolt Unstiffened End Plate Connection Design

4 bolt unstiffened end plate connection is a moment-resisting connection (rigid connection) that is connected to the columns' flange to the beams. Bolt control, weld control, plate control and connection application limits control are performed automatically according to the placement of the elements of the connection. 4 bolt unstiffened end plate connection is made automatically according to the Design, Calculation and Construction Principles of Steel Structures (ÇYTHYEDY) or AISC 360-16 regulations and the connection report is generated. Connection detail application limits are checked according to TBDY Table 9B.1.

In the calculation of the connection, the horizontal and vertical bolt distances, end plate weld thickness, continuity plate weld thickness and application limits are checked under geometry control. In strength checks, bolt diameter, end plate thickness, end plate shear yield, end plate shear failure, etc. are checked and reported.

### Geometry Checks

#### Horizontal Edge Distance

 Leh ≥ L e- min ÇYTHYEDY 13.3.7 Leh 70 mm L eh ≥ 2d = 2 * 30 = 60 mm conformity check for application √ Le- min 40 mm Minimum distance check according to Table 13.9 √

#### Vertical Edge Distance

 Lev ≥ L e- min ÇYTHYEDY 13.3.7 Lev 85 mm L eh ≥ 2d = 2 * 30 = 60 mm conformity check for application √ Le- min 40 mm Minimum distance check according to Table 13.9 √

#### Beam Web to End Plate Weld Size

 a ≥ a min a 6 mm √ a min 3.5 mm Table 13.4 √

#### Continuity Plate to Column Flange Weld Size

 a ≥ amin a 8 mm √ amin 4 mm Table 13.4 √

#### Continuity Plate to Column Web Weld Size

 a ≥ amin a 8 mm √ min 4 mm Table 13.4 √

### Connection Detail Prequalification Limits (TBDY Table 9B.1)

 Beam span / Beam cross-section height 9144 mm /450 mm=20.32 ≥7.0 End plate thickness, tp 32 mm 12≤t p ≤60 Head plate width, bp 290 mm 160≤ b p ≤ 300 Horizontal distance between bolts, g 150 mm 100≤g≤155 pfi 60 mm 40≤p fi ≤115 pfo 60 mm 40 p fo ≤115 Beam cross-section height, db 450 mm 270≤ d b ≤ 1400 Beam flange thickness, tbf 15 mm 10≤t bf ≤25 Column cross-section height 650 ≤ 920 mm Bolt class 10.9 8.8 - 10.9 Min yield stress of the end plate material 275 MPa 235 /275 / 355 MPa Flange plate welding CJP CJP

### Strength Checks

#### Bolt diameter

 Muc 783.345 kNm AISC 358-16 (6.8-3) Ft 750000 kN/m2 ho x1 db

Required

Ratio

Control

29.141 mm

30 mm

0.971

#### End Plate Thickness

 Muc 783.345 kNm AISC 358-16 (6.8-5) Fyp 275000 kN/m2 s Yp Yp tp

Required

Available

Ratio

Control

30.74 mm

32 mm

0.961

#### End Plate Shear Yield

 M uc 783.345 kNm AISC 358-16 (6.8-7) F f R req = F f / 2 Fyp 275000 kN/m2 bp 290 mm tp 32 mm d 450 mm tbf 15 mm Rn

Required

Available

Ratio

Control

900,396 kN

1531.2 kN

0.588

#### End Plate Shear Rupture

 Muc 783.345 kNm AISC 358-16 (6.8-7) Ff Rreq = F f / 2 Fup 410000 kN/m2 An d 450 mm tbf 15 mm Rn ΦRn

Required

Available

Ratio

Control

900,396 kN

1027.3 kN

0.876

#### Bolt Shear at Support

 Ab Fn Rn ΦRn

Required

Available

Ratio

Control

212.57 kN

1145.11 kN

0.186

#### Bolt Bearing on End Plate

 dh 30+3=33 mm Lc,edge Rn ÇYTHYEDY 13.3.13Equation 13.14a and13.14b Rn-edge Lc,spacing Rn-spacing Rn ΦRn

Required

Available

Ratio

Control

212.57 kN

3400.704 kN

0.063

#### Bolt Bearing on Column Flange

 d h 30+3=33 mm Rn ÇYTHYEDY 13.3.13Equation 13.14a and13.14b Rn-edge Lc,spacing Rn-spacing Rn ΦRn

Required

Available

Ratio

Control

212.57 kN

3294.432 kN

0.065

#### Beam Web to End Plate Weld Strength

 Fyp 275000 kN/m2 AISC 358-16(6.7.6) 3 tbw 9 mm Fe 490000 kN/m2 w

Required

Available

Ratio

Control

4.763 mm

8.487 mm

0.561

#### Column Flange Thickness

 Muc 783.345 kNm AISC 358-16 (6.8-5) Fyp 275000 kN/m2 s c Yc Yc tcf

Required

Available

Ratio

Control

24.324 mm

31 mm

0.785

#### Column Panel Zone Shear

 Pr 429.124 kN ÇYTHYEDY 13.29a Py Fy 275000 kN/m2 Ag 28634.759 mm2 dc 650 mm tw 16 mm Rn ΦRn

Required

Ratio

Control

1595.191 kN

1716 kN

0.930

#### Panel Zone Thickness

 tmin ≥u / 180 TBDY 2018 9.3.4.2b tmin = tw 16 mm tw 16 mm u 2016 mm

Required

Available

Ratio

Control

11.2 mm

16 mm

0.700

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