曲线组合梁畸变效应的弹性地基梁有限元解法  

Finite element solution for curved composite beams with distortional effect based on elastic foundation beam method

作　　者：刘玉玲[1] 张彦玲[1] 张德莹[1] 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《广西大学学报（自然科学版）》2016年第1期203-211,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51108281);河北省自然科学基金资助项目(E2014210038);河北省高等学校科学技术研究项目(ZD2014025)

摘　　要：为了对曲线组合梁的畸变效应进行研究,针对钢—混凝土曲线组合梁,首先采用M/r法将曲线转化为直梁,然后基于能量变分原理,并考虑钢梁与混凝土板的材料差异,推导了畸变荷载作用下组合梁的畸变控制微分方程。以哈大线某曲线组合梁为计算模型,根据弹性地基梁比拟法,分别采用初参数法和Midas有限元模型对跨中截面的畸变角和畸变双力矩进行了计算。结果表明,在弹性地基梁原理基础上,初参数法和有限元法均可很好地模拟曲线组合梁的畸变效应。In order to analyze the distortion effect of curved composite beams,a curved steel-concrete composite beam was simulated as an equivalent straight one by the M / r method. Based on the energy-variational principle,and considering material difference between the concrete slab and steel girder,the distortional governing differential equation for the composite beam was deduced. A curved composite beam in Harbin-Dalian railway was selected as a computational example. Based on the elastic foundation beam analogy method,the distortional angle and bi-moment were obtained by the initial parameter method and the finite element method,respectively. The results indicate that,based on the elastic foundation beam analogy method,and simulating the curved composite beam to an equivalent straight one by the M / r method,both the initial parameter method and the finite element method can satisfyingly deduce the distortion effect of the curved composed beam.

关 键 词：曲线组合梁 畸变效应 弹性地基梁比拟法 初参数法 有限元法 

分 类 号：TU391[建筑科学—结构工程]