Assessment Of The Effect Of Concrete Class Variation On Dynamic Response Of Framed Structures

Most of the time attention is not given by engineers when higher quality of concrete than therndesign requirements is used. And this indeed will increase the stiffness. In order to study thernbehavior and response to such increased stiffness, moment resisting planar structure has beenrnselected for the research. Parametric study was conducted by varying the number of bays, thernnumber of storey and percentage of the total storey with which higher quality concrete is made.rnThe higher class concrete was obtained from actual test data selected out of 1,148 results out ofrnwhich 575 of them are the 28th day strength. The mean plus one standard deviation value isrnselected for the 28th day test result.rnTime history analysis using Newmark’s average acceleration method is used to obtain thernresponse at different times. The result shows that higher response was observed in all thernparametric cases as compared to what is obtained from uniform concrete class analysis.

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