Design of composite beams with web openings
نویسنده
چکیده
ao"length of opening dh, dl"distance from top of steel section to centroid of concrete force at high and low moment ends of the opening, respectively dr"distance from outside edge of flange to centroid of reinforcement *b"maximum bending deflection for unperforated beam *m,b"maximum bending deflection for a member with an opening Fy"yield stress of steel FM y"reduced axial strength of steel in web due to combined axial stress and shear stress f @ c "compressive strength of concrete ho"length of opening Ig"gross moment of inertia of unperforated member Iwo"moment of inertia at web opening Ls"span length M"moment Mm"maximum nominal flexural capacity at opening Mn"nominal bending capacity Mth , Mtl"secondary moments at highand low-moment ends of opening, respectively Mu"factored bending moment l"dimensionless ratio relating secondary bending moment contributions of concrete and opening reinforcement to product of plastic capacity of a tee and the depth of the tee m"aspect ratio of a tee"ao/st Pch , Pcl"concrete forces at highand low-moment ends of opening, respectively Pr"force in reinforcement along edge of opening st"depth of tee tw"thickness of web V"shear Vm"maximum shear capacity at location of opening Vmt"maximum shear capacity of a tee Vn"nominal shear capacity Vpt"plastic shear capacity of web of tee Vu"factored shear Design of composite beams with web openings
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