关于连续梁桥墩计算长度系数的探讨

首先,在深入研究连续梁桥墩屈曲机理的基础上,结合实际工程特点,建立力学模型,根据欧拉公式进行理论推导分析得出桥墩计算长度系数的超越方程;然后进一步分析桥墩计算长度系数的影响因素及其与桥墩计算长度系数间的相互关系;最后,利用有限元建模对某高速公路桥梁进行稳定分析,求解出桥墩计算长度系数,并与理论计算结果进行对比分析。结果表明:有限元计算结果与理论计算结果吻合很好,验证了桥墩计算长度系数求解的正确性。

Study on effective length factor of the continuous bridge pier

According to the engineering features of structural system buckling of continuous bridge pier, the mechanical calculation model was set up and the transcendent equation involving pier effective length factor was derived relying on the euler formula. Secondly, the relationship of influencing factors and effec- tive length factor of the continuous bridge pier was analyzed. Lastly, the finite element analysis on an expressway bridge was made and the comparison between the finite element analysis and calculated result of transcendent equation was furnished. The theoretical calculated result was close with the modeling results. It shows that the solution of the effective length factor of the continuous bridge pier is correct and effective.