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|Title:||PLASTIC HINGES IN CONCRETE STRUCTURES|
|Abstract:||The early pioneers in reinforced concrete worked with familiarity to the actual behaviourof concrete under stress and strains upto its failure. Many early design theories e.g.: of Koenen(1886) , Ritter (1 099) ,Whitney (190 and K.nseb(1914) (13~ maintain a good correlation between test results and calculated v ' values. But, after acme ti*e, there was a drift towards arbitrary design rules and finally 'Straight line and no tension' theory was accepted in practice as it was in line with elastic theory applied to steel structures, was simpler to use and safer In its results. The+straight line and no tension'th.ory for R.C.dt tares has no relation with reality and does-not give a true idea of the factor of safety of a sttruatur . The actual collapse load may be quite different from the one calculated on the basis of this theory. Thus, it is less In case of colmns and mere in cast of beams. Moreover # there is no consistency in present design procedures. Samstlmes ultimate strength methods are used(axiatly loaded cal= s) ! soae•tirnes elastic methods are used(bems) and sometimes a mixture of both is used (upto 15% reduction of support moment or span moment in the case of continuous beams according to *Cumber in the parenthesis refer to the number in the Bibliography|
|Appears in Collections:||MASTERS' DISSERTATIONS (Civil Engg)|
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