10-10-2014, 02:16 PM
Analysis of structures lateral forces is of considerable importance in engineering
practice. Lateral forces caused by natural phenomena like wind and earthquake
are random processes. Investigation of structural behaviour due to dynamic
forces caused by such phenomena is a growing structural engineering problem.
Chimneys and stacks are an important class of civil engineering structures which
demand an earthquake resistant in seismic areas. Although, the codes of practice
provide some guide lines for the design of such structures there are several
questions yet unanswered. One such question is about the effect of self weight
and vertical acceleration on the bending moment and shear force developed in a
structure during earthquake excitation. In this report an attempt is made to'
study this effect to a limited extent.
In Chapter-1, the free vibration analysis of the uniform, cantilever beam
including self weight is presented. In Chapter-2, the result of the free vibration
analysis has been used to study the relative velocity response, spectrum which is
normally sued as a basis for earthquake resistant design. In Chapter – 3, the
forced vibration analysis of a uniform cantilever structure under several
earthquake excitations has been presented. The effect of self weight and the
vertical component of the acceleration has been included in this analysis