A Computer Program For Generating Design Charts Of L-shaped Short Columns On The Basis Of Ebcs 2 - 1995

In this thesis a program is developed to generate design charts of L-shaped reinforced concreterncolumn on the basis of EBCS-2, 1995. Design chart can be prepared for any cross-sectionalrndimension of columns with possible arrangements of reinforcement bars. The program will havernalso freedom for the choice or different reinforcement and concrete grades. The section is alwaysrnbi-axial and strength is computed by assuming different position of the neutral axis of givenrnorientation. Strain compatibility and equilibrium equations are applied for the section capacityrndetermination according to the Ethiopian Building Code Standard.rnGreen’s theorem is used to convert the double integral over the area in to line integral. ThernGaussian Integration is also used to convert the double integral over the compressive zone in to arnline integral along the perimeter of the compressive zones. Finally numerical method is used tornconvert the line integral in to simpler mathematical expression for programming. The principles ofrncoordinate geometry are used to calculate the intersection point of two lines, the distance betweenrnto points and other important parameters to be incorporated in the program. Although equivalentrnrectangular stress-distribution due to Whitney can be used with out much loss in accuracy, thernparabolic-rectangular stress distribution is used for the analysis of the concrete section as isrnprimarily recommended by EBCS-2, 1995.rnThe design chart can be generated for all possible reinforcement ratios and any possible orientationrnof the neutral axis. It should however be noted that the Ethiopian building code standardrnlimitations on the reinforcement ratio, section dimension, amount of reinforcement bars should bernmaintained for good design. The program is written in visual Fortran programming language;rnhowever, the program can be run from Microsoft visual C++ window without any change in thernalgorithm. The output of the program will be automatically exported and saved in to a text file thatrncan be opened using Microsoft office excel program to generate the charts. The chart generated isrnfinally verified with registered version of Alashki’s program for accuracy and satisfactory resultsrnare obtained.

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