Study On The Stability Of Reinforced Concrete Rectangular High - Pier

With the rapid development of China’s road construction,a large number of high pier bridge are built in the mountain and hill areas. Because of its simple process, easy formwork supporting, convenient construction and other advantages, reinforced concrete rectangular piers has been widely used. With slenderness ratio of the pier becoming larger and larger, the stability of high pier is becoming increasingly important. The influential factors of the stability of square and rectangular reinforced concrete members under axial and eccentric compression are investigated in this paper, and based on the engineering program of Ge Men Great Bridge, the stability of high pier under actual load parameters is studied,the main contents are as follows:(1) Based on previous researches, an appropriate material constitutive model was chosen, and programming calculations on the ultimate bearing capacity of square and rectangular reinforced concrete under axial and eccentric compression are carried out with numerical integration method. Besides, the finite element software ABAQUS is used for simulation analysis of square and rectangular reinforced concrete members, the calculated results of the numerical integration method and ABAQUS simulation are found to be in good agreement with experimental results.(2) Parameter analysis is carried out with both numerical integration method and ABAQUS finite element analysis, the effecting factors of square and rectangular reinforced concrete columns under axial and eccentric compression are analyzed by changing the uniaxial compressive strength of concrete, yield strength of steel, reinforcement ratio, slenderness ratio and other parameters.(3)The actual piers are simplified and analyzed by using research methods introduced in this thesis. The influence of uniaxial compressive strength of concrete, yield strength of steel, reinforcement ratio and horizontal loads on the stability capacity of the piers are analyzed.