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Connection Failure Mode Explorer

AISC Limit States · Bolt Shear · Bearing · Tearout · Net Section · Block Shear

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Connection FAILS

Bolt Shear governs, φRn = 53.7 kip < Ru = 80 kip (DCR = 1.49).

🔧 Connection Geometry & Load

Applied load Ru80 kip

Number of bolts n3

Bolt diameter db

Steel grade

Bolt grade

Plate thickness t0.375 in

Plate width (gross) Wp6 in

Edge distance Le1.5 in

Bolt spacing s3 in

📐 Connection Sketch

AISC 360-16 Chapter J & D limit states for bolted connections. φ: bolt shear/bearing/tearout/net-fracture/block-shear = 0.75; gross yield = 0.90. The minimum φRn governs. Block shear tension area is approximated for a single bolt line — verify geometry for design. dh = db + 1/8 in (standard holes).

References

AISC 360-16 §J3.6 — bolt shear

§J3.10 — bearing & tearout

§J4.1 — tension yield/fracture

§J4.3 — block shear

§D2 — tension members

Governing Limit State

Bolt Shear

φRn = 53.7 kip · DCR = 1.49

6 / 6 revealed

Limit States — Ranked by φRn (ascending)

Limit StateφRn (kip)DCR

Bolt Shear◀ GOVERNS

AISC J3.6

53.71.49

Gross Section Yield

AISC J4.1 / D2

72.91.10

Net Section Fracture

AISC J4.1 / D2

83.60.96

Block Shear

AISC J4.3

87.40.92

Bolt Bearing

AISC J3.10

88.10.91

Bolt Tearout

AISC J3.10

104.00.77

■ DCR ≤ 0.75■ 0.75 < DCR ≤ 1.0■ DCR > 1.0 (overstress)

Demand vs Capacity

Applied load Ru80 kip

Governing capacity φRn53.7 kip

Governing modeBolt Shear

Demand-Capacity Ratio1.49