A discussion on linear elastic stability safety coefficient of bridge structure

There are disputes in the calculation of elastic stability coefficient in bridge engineering,which brings inconvenience to the design and calculation of bridges.In view of that,three common methods about it were expatiated,and three opinions that should be paid attention to in elastic stability analysis were presented.Taking a bottom consolidated pillar as example,the elastic stability coefficients given by the common methods were analyzed and compared and a new ameliorated calculation method was proposed.The methods had been analyzed and compared in detail after being applied to a concrete-filled in steel tubes(CFST) stiff-skeleton arch bridge.The results showed that the new method firstly calculated the stability coefficient of structure under the action of dead loads,and then,on the Premise that the stability of the structure subjected to dead loads satisfing the lowest requirement,the stability safety coefficient of external loads was calculated.With this new method the elastic stability and bearing capacity of structure can be estimated more reasonably,providing a reference to engineering designers.