| Summary: | 碩士 === 中興大學 === 土木工程學系所 === 95 === This thesis is to discuss the maximun first story inner forces ratio of the reinforce concrete structrue between the dynamic analysis and the equivalent lateral static analysis without considering dynamic torsion separately,then the stories diffrence and the amplification effect. Besides,we also discuss the structrue model of five,ten and twenty stories subjected an one direction different eccentric (5%、 10%、 15% 、20% 、25%、 30% )earthquake excitation,the maximun first story column inner force in the dynamic analysis and the equivalent lateral static analysis without dynamic torsion.
The equipollence lateral static analysis without considering the dynamical torsion means that the equipollence lateral forces from dynamical analysis apply the stories for static analysis.Therefore,the effect of dynamical amplification increases with eccentricity for sturtures below four-story buildings ,however , the effect is getting lower for sturtures above four-story buildings
However,when obtaining the inner forces of frames with dynamical analysis , the moments of the frame nodes could not be balanced and the shear forces of some story would not equal the total shear force. Consequently , the research could display the distribution of the inner forces of the structure and more reasonable structure analysis ,by this means ,proposing the modified static analysis method replace the dynamical analysis.
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