multiple connections are part of the same Connection Rule from an integrated RISA-3D model), if any connection has an axial tension in its beam for any load combination then all of the Connections in that group will receive the L-shaped weld configuration. When multiple Double Angle Shear Connections are grouped together (i.e. In addition an Angle Leg Bending limit state is checked to ensure that the unsupported angle leg doesn't fail in bending due to the axial force. The capacity of the weld is then taken as double that of a single clip angle shear connection. Because no adequate methodology for the torsional strength of weld exists, the program will automatically place a weld on the bottom of the clip angles as well. When axial tension is present in the beam, the weld configuration of a single vertical weld on each clip angle (at the support) is inadequate, as that weld would have to resist the tension via torsion in the weld throat. The weld to beam is illustrated in Figure 10-4b of the AISC 14th Edition Manual. The weld to support is illustrated in Figure 10-4c of the AISC 14th Edition Manual. The geometries used are industry standard, and illustrated by the AISC. In order to make the connection property inputs easier these geometries may not be altered. The weld geometry for each connection is locked by the program. H(flat) = The workable flat (straight) dimension along the height, h (in.)ī(flat) = The workable flat (straight) dimension along the width, b (in.)Ī(surf) = The total surface area of a rectangular or square HSS section (ft.^2/ft.This topic is specific to welding geometry, base material strengths, weld strengths and all other welding considerations. SLBB = Short legs back-to-back for double angles LLBB = Long legs back-to-back for double angles Ro(bar) = Polar radius of gyration about the shear center = SQRT(xo^2+yo^2+(Ix+Iy)/A) (in.)
Yo = y-coordinate of shear center with respect to the centroid of the section (in.) Xo = x-coordinate of shear center with respect to the centroid of the section (in.)
Y(bar) = Distance from outside face of outside face of flange of WT or angle leg to Y-axis (in.)Įo = Horizontal distance from the outer edge of a channel web to its shear center (in.) = (approx.) tf*(d-tf)^2*(bf-tw/2)^2/(4*Ix)-tw/2 X(bar) = Distance from outside face of web of channel shape or outside face of angle leg to Y-axis (in.) Qw = Statical moment at the mid-depth of the section (in.^3) Qf = Statical moment for a point in the flange directly above the vertical edge of the web (in.^3) Sw = Warping statical moment at a point on the cross section (in.^4) Wno = Normalized warping function at a point at the flange edge (in.^2) G = Shear modulus of elasticity of steel = 11,200 ksi J = Torsional moment of inertia of member (in.^4)Ĭ = Torsional constant for HSS shapes (in.^3)Ī = Torsional property, a = SQRT(E*Cw/G*J) (in.)Į = Modulus of elasticity of steel = 29,000 ksi Ho = Distance between centroid of flanges, d-tf (in.) Yp = vertical distance from designated member edge to plastic neutral axis (in.) Xp = horizontal distance from designated member edge to plastic neutral axis (in.) Zy = Plastic section modulus of member taken about Y-axis (in.^3) Zx = Plastic section modulus of member taken about X-axis (in.^3) Ry = Radius of gyration of member taken about Y-axis (in.) = SQRT(Iy/A) Sy = Elastic section modulus of member taken about Y-axis (in.^3) Iy = Moment of inertia of member taken about Y-axis (in.^4) Rx = Radius of gyration of member taken about X-axis (in.) = SQRT(Ix/A) Sx = Elastic section modulus of member taken about X-axis (in.^3) Ix = Moment of inertia of member taken about X-axis (in.^4) Gage = Standard gage (bolt spacing) for member (in.) (Note: gages for angles are available by viewing comment box at cell K18.) T = Distance between fillets for wide-flange or channel shape = d(nom)-2*k(det) (in.) K1 = Distance from web centerline to flange toe of fillet (in.) K = Distance from outer face of flange to web toe of fillet (in.) H = Depth of member, parallel to Y-axis (in.)īf = Width of flange of member, parallel to X-axis (in.)ī = Width of member, parallel to X-axis (in.) NOMENCLATURE FOR AISC VERSION 14.1 MEMBER PROPERTIES AND DIMENSIONS:Ī = Cross-sectional area of member (in.^2)ĭ = Depth of member, parallel to Y-axis (in.) Here is a link to the website where the source database file can be found: This workbook is based on the "AISC Shapes Database" Version 14.1 (October 2013), and has the same look as the ones that I did based on earlier AISC shapes database/manual versions.