Abstract:
Wall-frame structures in high rise buildings very
often Comprise columns and girders whose lateral dimensions
(i.e. the depth of column and width of girder) are Unequal.
~ simplified method of calculating the stresses and deflec_
tions in such structures, sUbjected to lateral loads, is
presented.
The accuracy of the method is verified by analyzing
a 10-storey wall-frame and comparing the results of the
simplified method with those obt~ned from a finite element
analysis and a continuous medium analysis.
The method, originally propOsed by A.H. Khan for wallframe
structures of uniform thickness, consists in dividing
the original structure into a discrete number of 'modules'
which are then replaced by uniform plate elements of same
height and width as the parent module and same thickness
as that of column of the parent module, but having analogous
stiffness properties. This report presents the results of
an effort to extend Khan's method to structures where the
lateral dimension of columns and girders are unequal.
General computer programmes for the analysis of wall_
frames, subject to lateral load, have been developed Using
the following three methods:
i. Simplified Method
ii. Finite Element Method
and iii. Continuous Medium Method
ii,
Wall-frames consisting of variable thickness columns
and girders are analysed by the proposed simplified method
and the results are compared with those obtained by continuous
Medium Method and Finite Element Method. The values
of stresses and deflections obtained from the simplified
method agree well with these obtained from a finite element
analysis and from continuous medium method.
