Study of Failure Pattern for Three Building Structures due to 921 Chi-Chi Earthquake
|關鍵字:||軟弱層效應;短柱效應;集集大地震;soft story effect;short-column effect;921 Chi-Chi Earthquake|
The main purpose of this thesis is to discuss two main failure patterns of three building structures in 921 Chi-Chi earthquake. The soft story effect and the short-column effect are the major reasons for the failure. These two effects are strongly related to the existence of walls. We perform static analysis and dynamic time history analysis for three real buildings （labeled A, B and C） collapsed in this earthquake in order to compare the result with wall effect and that without wall effect. The results show that the columns in the ground story will bear more moment under the condition that the ground story becomes soft story which means that the walls in ground floor failure first. And the columns in the corner will bear extremely large axis force. The building A and C are failed by this effect. For building B, some half-height walls are filled for some spans in ground floor to create short column effect. And we found that those short columns during earthquake will have to resist double, even triple of the shears which is the result without considering short column effect.
|Appears in Collections:||Thesis|