摘要
Building collapse mostly can be caused by the loss of loading capacity in a primary structural component,resulting in the failure of surrounding elements,which in turn cause a failure propagation.Progressive collapses may be accidental,due to design deficiencies or errors,material failure or natural phenomenon(e.g.earthquakes)but it can be prevented by upgrade the concrete components’material[1,2].Well-engineered RC buildings generally have a good performance under normal loading conditions.However,faulty design,construction errors,material deterioration,and overloading are always occurred.When part of structure fails,the total load in the whole system will not disappear,which means the load will be redistributed unevenly to the adjacent part of structure.This phenomenon revealed that sustained high stresses in RC elements can lead to catastrophic collapse.Due to very few of papers did the research on the RC elements under high stress level sustained load,relevant experiments should be performed in this area.This paper gives the suggestions about how to apply the load in an experiment if researchers want to know the behavior of elements near to collapse especially focus on RC columns.
