Seismic Response Collapse and Earthquake Resistant Capacity of Multi-Story Concrete Filled Steel Tube Frame

点击翻译按钮获取中文摘要

The damage ratio equation of H-section cantilever beam under strong repeated load is obtained on the basis of the very low cycle fatigue of it. By introducing not only the steel tube crack of concrete filled steel tube column (CFT column) but also the very low cycle fatigue of H-section beam, the collapse analysis method of multi-story CFT frame under extremely strong ground motion has been proposed. Seismic response and collapse of multi-story CFT frames designed under quite different conditions are calculated by the presented numerical analysis method. From the calculated results it is shown that the crack of CFT column is closely related to the collapse of CFT frame but the failure of H-section beam does not effect directly on it.