Deducing Formula of Critical ｌｏａｄ of Thin Wall Hollow Pier In Construction Stage 

Qiang YU 

College of Civil Engineering. Chongqing Jiaotong University,Chongqing,400074, CHINA 

Abstract: According to the calculation formula of critical ｌｏａｄ of thin-walled hollow pier in the construction stage of the derivation of Bessel differential equation, and using the ANSYS finite element model is established to verify the formula, numerical results show that using the formula to calculate the construction stage stability of thin-walled hollow pier is feasible, and has high precision. 

Keywords: Thin-Wall Hollow Pier;Central Pressure Par;Bessel Equation;Critical ｌｏａｄ