Shear response of reinforced concrete T. beams to static and repeated loads

As the mQthods of analysis for structures become morexact, the demand for more -Fundamental in;orm~tions in the.bQh~viour of reinforced concrete beams under v~rious typesof loading has become pressing. structural engineers. ofcourse, navs been aware’ of the need to ’\Jnderstand the shearresponse of ooncrete member’s to static and repeetad loedsw1 th connection wi tn over-reinforcedmambers. as in case ofbeams in high-rise buildi~g and bridges, L Although, most-C-”of the various Codes assess the sh-ear s t r-ang tb of under-vreinforced beams. no effic ient method for checki ng over+Ireinforced ones is given. I Therefore. it is bel ievad thatthe need exists Tor additional re$earch and development onshear rB$pOnSe of such ,beams, not only to provide a betterunderstanding of the behaviour o~ the over-reinforced con-crete baams. but also to broaden the acceptanb~ of the wellknown formul~e given by the Codes ’;or beams of high steelrlltio. In doing s o , such s.tudies must taken into considera-tion the effect of shear apan to depth ratio, steel percentage,concrste grade, ratio d.istributlon of web reinforcement. andflange dimen,ionl of T-beams. The role of the ef~8ct ofthese parameters on she~r resist~nce of such beams is notconspicouous from the available literature data. Con.sequently~the following quesion may arise: