penetrations through concrete beams

huangyhg

penetrations through concrete beams
anyone have any good references for designing penetrations through concrete beams?  thanks.
check out our whitepaper library.
aci structural journal vol. 96 no. 5
675 design of reinforced concrete beams with small openings under combined loading
m.a. mansur
this one above is for small circular openings.
aci structural journal vol. 96 no. 6
899 effects of creating an opening in existing beams
m.a. mansur, k.h. tan & w. wei
for door, window and bigger rectangular holes it is useful a look to books related to rectangular holes in shear walls and vierendeel beams.
also, you can freely download from the collaboratory site at mathsoft a worksheet doing the small circular opening calculation as per mansur.